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Chemical Process Flashcards

1
Q

Oxidation of SO2 to SO3 is favoured by

A

low temperature and high pressure.

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2
Q

Gun powder, which is an explosive comprises of charcoal, sulphur and

A

salt petre

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3
Q

Starting raw material for the manufacture of alum is

A

bauxite

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4
Q

Salt cake is chemically represented by

A

Na2SO4

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5
Q

Which of the following sugars is the sweetest?

A

Fructose

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6
Q

Paper pulp produced by kraft/sulphate process is

A

strong fibrous

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7
Q

Claude process of gas liquefaction employs

A

adiabatic expansion against a piston or in a turbine.

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8
Q

The main use of HCl is in the

A

drilling of petroleum wells and pickling of steel sheets.

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9
Q

The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.

A

endothermic

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10
Q

Viscose rayon is chemically

A

regenerated cellulose acetate

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11
Q

All enzymes are made of

A

proteins

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12
Q

The combustion reaction, C + O2 = CO2, is

A

exothermic

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13
Q

Styrene is produced from ethyl benzene by the process of

A

dehydrogenation

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14
Q

Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of

A

callagen

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15
Q

The chamber process is

A

none of these.

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16
Q

Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

A

15 - 20

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17
Q

Fusel oil is a/an

A

mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).

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18
Q

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A

all (a), (b) and (c).

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19
Q

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

A

ZnO

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20
Q

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

A

oleum

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21
Q

Haemoglobin is a/an

A

protein

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22
Q

Epoxy resin

A

is a good adhesive.

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23
Q

Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.

A

50

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24
Q

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A

Pollution of water stream by mercury.

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25
Q

Esterification reaction produces

A

soap

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26
Q

Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.

A

adsorbs

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27
Q

Producer gas consists mainly of

A

CO, CO2 N2, H2

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28
Q

Neoprene is the trade name of

A

polychloroprene

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29
Q

Hard water

A

is not unfit for drinking purpose.

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30
Q

Which of the following is an organo-metal-lic compound ?

A

Tetra-ethyl lead

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31
Q

Sulphur addition in soap is done to

A

cure pimples & dandruff.

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32
Q

Phosphate rock is a raw material for the manufacture of

A

all (a), (b) and (c)

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33
Q

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A

all (a), (b) and (c).

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34
Q

Which of the following is not a raw material used for the manufacture of ordinary glass?

A

Iron oxide

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35
Q

Esterification reaction

A

all (a), (b) and (c).

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36
Q

In sulphate pulp manufacture, the pressure and temperature in the digestor is

A

10 atm., 170-180°C

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37
Q

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

A

sodium chloride

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38
Q

Pick out the endothermic reaction out of the following.

A

CaCO3 = CaO + CO2

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39
Q

Pasteurisation of milk means

A

killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.

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40
Q

Fusion of bauxite and __________ produces high alumina cement.

A

limestone

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41
Q

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

A

Solvay

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42
Q

Polycaprolactum is commercially known as

A

nylon-6

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43
Q

Frasch process is for

A

mining sulphur

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44
Q

Very fine suspended and colloidal impurities are removed from water by a process called

A

coagulation

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45
Q

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

A

it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.

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46
Q

Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

A

CO

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47
Q

The drug used in contraceptives is

A

mestranol

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48
Q

Raw materials used for producing __________ cement does not contain iron oxide.

A

white

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49
Q

In the Lurgi coal gasifier

A

large quantity of coal can be processed.

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50
Q

Neon gas is

A

used in color discharge tube.

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51
Q

Calgon used in water treatment is chemically

A

sodium hexametaphosphate

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52
Q

Which oil is preferred for paint manufacture ?

A

Drying oil

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53
Q

Styrene butadiene rubber (SBR) is

A

a synthetic polymer.

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54
Q

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A

5 atm & 275°C

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55
Q

Glycerine is not used in the

A

none of these.

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56
Q

Cumene is the starting material for the production of

A

phenol and acetone

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57
Q

The type of high refractive index glass used in optical instruments is __________ glass.

A

flint

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58
Q

Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.

A

vanadium

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59
Q

Most commonly used rubber vulcanising agent is

A

sulphur

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60
Q

Terylene is

A

both (a) & (b)

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61
Q

Free alkali in a toilet soap is __________ that in a laundary shop.

A

less than

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62
Q

Dehydrogenation of isopropanol produces

A

acetone

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63
Q

Pick out the wrong statement.

A

Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.

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64
Q

Concentration of hydrogen peroxide is done by

A

vacuum crystallisation

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65
Q

Helium is produced on commercial scale from

A

natural gas

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66
Q

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

A

20 - 30

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67
Q

The catalyst used in the manufacture of DDT is

A

20% oleum.

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68
Q

Most widely and commonly used coagulant for the removal of suspended impurities in water is

A

alum

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69
Q

__________ is used as a catalyst in fat splitting.

A

ZnO

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70
Q

Which of the following is not produced on commercial scale from sea water?

A

Sodium sulphate.

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71
Q

Heating of __________ to 120°C, produces plaster of paris.

A

gypsum

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72
Q

Pick out the wrong statement.

A

Decomposition of sulphuric acid on heating does not start before its boiling.

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73
Q

Which of the following has sodium bicarbonate as its main constituent ?

A

Baking powder

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74
Q

Ordinary glass is not a/an

A

material with sharp definite melting point.

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75
Q

In premitive days, __________ was being manufactured by Leblanc Process.

A

soda ash

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76
Q

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at

A

SASOL (in South Africa).

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77
Q

Lurgi coal gasifier is a pressurised __________ bed reactor.

A

moving

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78
Q

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

A

cause cholesterol build up and blood clotting.

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79
Q

Paper grade bamboo contains about __________ percent cellulose.

A

5

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80
Q

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

A

anti soil redeposition agent

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81
Q

Vulcanisation of rubber

A

converts its plasticity into elasticity.

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82
Q

Raw materials for ‘Solvay Process’ for manufacture of the soda ash are

A

salt, limestone and coke or gas.

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83
Q

Chloral is used in the manufacture of

A

DDT

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84
Q

Bromine is used in the preparation of

A

all (a), (b) and (c).

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85
Q

Sudden temperature fluctuation does not affect pyrex glass, because of its

A

low co-efficient of expansion.

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86
Q

The process used for the manufacture of ethyl alcohol from molasses is

A

none of these

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87
Q

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

A

< 10

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88
Q

Absorption of SO3 in 97% H2SO4 is

A

exothermic

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89
Q

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

A

Ostwald’s

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90
Q

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

A

car battery solution

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91
Q

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is

A

alumina

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92
Q

A good quality coal should have

A

none of these

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93
Q

Zeolite used in water softening process (cation exchange) is regenerated by washing with

A

brine

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94
Q

The catalyst used in shift converter is

A

nickel

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95
Q

Which of the following is a detergent ?

A

Alkyl benzene sulphonate

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96
Q

Drinking (potable) water treatment does not involve

A

softening

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97
Q

Phenol formaldehyde resin is used as an adhesive in making

A

laminates

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98
Q

Pick out the correct statement.

A

All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.

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99
Q

DDT should not be allowed to come in contact with iron (during its manufacture) to

A

avoid its decomposition.

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100
Q

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively

A

oxides of nitrogen & V2O5 on a porous carrier.

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101
Q

DDT stands for

A

dichloro-diphenyl-trichloroethane.

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102
Q

Phosphoric acid is prepared from

A

rock phosphate

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103
Q

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

A

as a lubricant.

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104
Q

Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?

A

Lime-soda process

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105
Q

Bleaching action of bleaching powder is due to its __________ properties.

A

oxidising

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106
Q

Solvent extracted oil

A

none of these.

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107
Q

Which of the following is not required in the manufacture of soda ash by Solvay process ?

A

Nitric acid

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108
Q

Saponification number of an oil or fat

A

all (a), (b) & (c).

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109
Q

The purpose of tanning in leather industry is to

A

stiffen the leather.

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110
Q

Lime and soda ash are added to water to remove

A

bicarbonates & sulphates of calcium and magnesium.

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111
Q

Kaoline is a/an

A

refractory material

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112
Q

Hydrogenation of edible vegetable oils

A

all (a), (b) and (c).

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113
Q

Phenol is mainly used

A

to produce phenol formaldehyde.

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114
Q

Main constituent of dolomite is

A

MgCO3

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115
Q

Conversion of CO to CO2 by steam in presence of a catalyst is called

A

shift conversion.

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116
Q

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

A

recuperator

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117
Q

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

A

Cl2

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118
Q

Plasticisers are added to paints to

A

give elasticity & prevent cracking of the film.

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119
Q

Resistance to fusion of the refractory under a steady rising temperature condition is called

A

refractoriness

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120
Q

Portland cement consists mainly of

A

CaO & SiO2

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121
Q

__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

A

Pyrex

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122
Q

The amount of benzene present in pure benzol is about __________ percent.

A

70

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123
Q

Cumene (isopropyl benzene) is made by

A

propylene alkylation of benzene.

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124
Q

Which of the following is not a pyrite ore?

A

Siderite

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125
Q

Mannheim furnace is used in the manufacture of

A

hydrochloric acid.

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126
Q

Thermosetting materials

A

are cross-linked molecules.

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127
Q

Pick out the wrong statement. Iodine value of an oil or fat is

A

independent of the type of oil, whether it is drying or non-drying.

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128
Q

Nickel is not used as a catalyst in the

A

Ostwald’s process of HNO3 manufacture.

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129
Q

__________ iron is the purest form of iron.

A

Wrought

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130
Q

Enamels

A

give good glossy finish.

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131
Q

Black liquor is converted into white liquor by

A

evaporation and burning the concentrate followed by causticisation of products.

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132
Q

Varnish does not contain

A

pigment

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133
Q

Alcohol is produced by the

A

hydrolysis of an ether

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134
Q

Varnish does not contain

A

pigment

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135
Q

Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called

A

teflon

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136
Q

Solvent used for extraction of oil is

A

hexane

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137
Q

Insulin is an __________ drug.

A

none of these

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138
Q

Liquor poisoning generally occurs due to the presence of __________ in it.

A

methyl alcohol

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139
Q

Neoprene is chemically known as

A

polychloroprene

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140
Q

Pick out the wrong statement.

A

Contact process of sulphuric acid manufacture uses nickel as the catalyst.

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141
Q

Pick out the wrong statement.

A

Raw materials for DDT manufacture are benzene and chlorine.

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142
Q

Molecular weights of polymers are in the range of

A

102 - 107

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143
Q

Sulphur removal by heating of pyrite ore in presence of air is called its

A

roasting

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144
Q

Deacon’s method is used for the manufacture of

A

chlorine

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145
Q

Pick out the true statement pertaining to water treatment.

A

Normally, the turbidity is removed by adding a coagulent prior to sedimentation.

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146
Q

Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.

A

borosilicate

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147
Q

Prussian blue is chemically represented by

A

Fe4 [Fe (CN6)3]

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148
Q

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

A

nitric acid

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149
Q

The most stable allotropic form of phosphorous is the __________ phosphorous.

A

black

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150
Q

Function of thinner in a paint is to

A

suspend pigments & dissolve film forming materials.

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151
Q

Starting material for the production of styrene butadiene rubber (SBR) is

A

both (a) & (b)

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152
Q

Which one of the following is not an elastomer ?

A

None of these

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153
Q

Which of the following processes can remove both temporary as well as permanent hardness of water ?

A

Distillation

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154
Q

Dacron is a

A

none of these.

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155
Q

Rancidity of the fatty oil can be reduced by its

A

hydrogenation

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156
Q

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like

A

all (a), (b) and (c)

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157
Q

__________ of rubber decreases after its vulcanisation.

A

Tackiness

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158
Q

Boiling of water containing temporary hardness produces

A

CO2

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159
Q

Starting material for the commercial production of ethyl alcohol in India is

A

molasses

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160
Q

Phenol formaldehyde

A

employs condensation polymerisation.

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161
Q

Which of the following is not an insecticide?

A

Hexane

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162
Q

Shrinkage volume in cement setting does not depend upon the

A

sand to cement ratio.

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163
Q

Bisphenol A is produced by the condensation of acetone with

A

phenol

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164
Q

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

A

sodium sulphide & sodium carbonate.

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165
Q

Presence of carbonaceous matter in the sewage

A

all (a), (b) and (c).

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166
Q

A mineral is termed as ‘ore’, if

A

a metal can be economically extracted from it.

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167
Q

In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst

A

all (a), (b) and (c).

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168
Q

At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system )

A

sqrt P

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169
Q

Oleum produces fumes of

A

SO3

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170
Q

20% oleum means that in 100 kg oleum, there are 20 kg of

A

SO3 and 80kg of H2SO4.

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171
Q

Chloramines are used in water treatment for

A

disinfection and control of taste & odour.

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172
Q

Glycerine is recovered from lye by

A

evaporation followed by vacuum distillation.

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173
Q

Inversion of sucrose produces

A

glucose

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174
Q

Enzymes are organic catalysts used in the __________ reactions.

A

biochemical

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175
Q

Linde process of gas liquefaction employs

A

adiabatic expansion through a throttle valve (Joule-Thomson expansion).

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176
Q

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.

A

50

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177
Q

Ore concentration by froth floatation utilises the __________ of ore particles.

A

wetting characteristics

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178
Q

The main use of activated carbon in water treatment is to control

A

taste and odour

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179
Q

The most commonly used substance to speed up the sedimentation of sewage is

A

lime

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180
Q

Sucrose is a

A

disacchride

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181
Q

Sugar content in sugarcane on cane basis is about __________ percent by weight.

A

5 to 10

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182
Q

Pick out the wrong statement.

A

Total sugar content in molasses is about 10%.

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183
Q

The major use of butadiene is

A

in the manufacture of synthetic rubber.

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184
Q

The manufacture of Kraft pulp is done by a/an __________ process.

A

alkaline

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185
Q

Antibiotic

A

inhibits/destroys the growth of microorganisms.

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186
Q

Which of the following paper does not require a filler during manufacture ?

A

Blotting paper

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187
Q

Industrial production of chloroform requires acetone and

A

calcium hypochlorite

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188
Q

Pencillin, an antibiotic drug was discovered by

A

Alexender

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189
Q

Styrene (a monomer for the production of polystyrene) is commercially produced by

A

catalytic dehydrogenation of ethyl benzene.

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190
Q

Hydrogenation of oil takes place in a/an __________ reactor.

A

trickle bed

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191
Q

Fatty material used in soap making is

A

tallow

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192
Q

__________ glass is used for the manufacture of optical glass.

A

Flint

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193
Q

Thermosetting plastic materials

A

can not be melted after forming.

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194
Q

Favourable conditions for the liquefaction of gases in general are

A

high pressure & low temperature.

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195
Q

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :

A

furnace → converter → absorber

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196
Q

__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

A

Complex forming

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197
Q

__________ is an ore of lead.

A

Galena

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198
Q

Which of the following is an yellow pigment ?

A

Lead chromates

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199
Q

Catalytic oxidation of toluene produces

A

phenol

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200
Q

SO2 is bubbled through hot sugar cane juice to

A

act as an acidifying agent.

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201
Q

The noble gas which occurs most abundantly in the atmosphere is

A

argon

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202
Q

Production of alcohol by fermentation of molasses is an __________ process.

A

aerobic

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203
Q

Main constituents of portland cement are calcium aluminate and

A

silicates

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204
Q

Pick out the wrong statement.

A

High early strength cement are made from materials having high silica to lime ratio.

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205
Q

Common salt is generally not produced commonly by __________ method from brine.

A

freeze drying

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206
Q

Which of the following is a detergent ?

A

Alkyl benzene sulphonate (ABS)

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207
Q

Sulphuric acid is mainly used in the __________ industry.

A

fertiliser

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208
Q

Pick out the wrong statement pertaining to nitric acid.

A

Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.

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209
Q

Alcohol percentage in molasses may be around

A

40

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210
Q

Main use of hydrazine is

A

as a rocket fuel

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211
Q

Main use of liquid nitrogen is in

A

refrigerative cooling.

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212
Q

Comparing sulphate process with sulphite process, we find that __________ in the later.

A

both temperature & pressure in the former is more than that

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213
Q

Which of the following is a disacchride ?

A

Sucrose

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214
Q

Proximate analysis of coal determines its __________ content.

A

moisture & volatile matter

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215
Q

Pick out the exothermic reaction out of the following:

A

CaC2 + H2O = Ca(OH)2 + C2H2

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216
Q

__________ is produced using polycondensation reaction.

A

Phenol formaldehyde

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217
Q

Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

A

vinyl chloride

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218
Q

In industrial nomenclature, alcohol means

A

ethanol

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219
Q

Which of the following is the purest form of water out of the following ?

A

Rain water

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220
Q

Use of water having dissolved oxygen in boilers promotes

A

corrosion

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221
Q

Unsaturated oils compared to saturated oils have

A

lower melting point & higher reactivity to oxygen.

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222
Q

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

A

decreases

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223
Q

Chemical formula of oleum is

A

H2S2O7

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224
Q

Electrodeposition of metals i.e. electroplating is never done on

A

refractories

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225
Q

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

A

strengthening

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226
Q

The biochemical treatment applied to sewage effluents is a process of

A

oxidation

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227
Q

Ultimate analysis of coal determines its __________ content.

A

carbon, hydrogen, nitrogen & sulphur

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228
Q

A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).

A

10

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229
Q

Sucrose content in cane sugar may be around __________ percent.

A

95

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230
Q

‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of

A

final rolling out of paper.

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231
Q

Yellow glycerine is made into white, using

A

activated carbon

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232
Q

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.

A

30 to 50

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233
Q

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A

reverse osmosis

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234
Q

Major component of flint glass is

A

lead oxide

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235
Q

Gypsum is chemically

A

calcium sulphate

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236
Q

Calcination of gypsum produces

A

plaster of paris

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237
Q

Phthalic anhydride is produced by the oxidation of

A

benzene

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238
Q

Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.

A

pyrex

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239
Q

Zeigler process

A

produces high density polyethylene.

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240
Q

Massecuite is

A

none of these.

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241
Q

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

A

94

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242
Q

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.

A

soft

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243
Q

Synthetic glycerine is produced from

A

propylene

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244
Q

A ‘unit process’ is exemplified by the

A

hydrogenation of oils

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245
Q

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is

A

all (a), (b) and (c).

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246
Q

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

A

reduce the variation in its viscosity with temperature.

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247
Q

Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction

A

decreases as the moisture content of flakes increases.

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248
Q

Sea weeds are an important source of

A

iodine

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249
Q

Polythene is a/an __________ polymerisation product.

A

addition

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250
Q

Catalytic oxidation-dehydrogenation of methyl alcohol produces

A

formaldehyde

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251
Q

In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by

A

removing some quantity of SO3 during intermediate stage.

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252
Q

Tall oil obtained as a by-product from the black liquor recovery is

A

all (a), (b) & (c).

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253
Q

__________ is a polysacchride.

A

Starch

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254
Q

Styrene is produced from ethyl benzene by the process of

A

dehydrogenation

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255
Q

Acetone is produced by catalytic dehydrogenation of

A

isopropanol

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256
Q

Nitrogen is an essential component of

A

proteins

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257
Q

Bromine content in sea water may be around __________ ppm.

A

70

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258
Q

Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is

A

0.94

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259
Q

Poly tetraflouro ethylene (P.T.F.E.) is known as

A

teflon

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260
Q

Bakelite is

A

same as thermosetting phenol-formaldehyde.

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261
Q

__________ is produced by the dehydrogenation of ethyl benzene.

A

Styrene

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262
Q

Which of the following is used as a coagulant in water treatment ?

A

Ferrous sulphate

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263
Q

__________ paper is used in the manufacture of newsprint paper.

A

Groundwood

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264
Q

Hydrodenation of vegetable oils is a/an __________ reaction.

A

exothermic

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265
Q

Permanent hardness of water is due to the presence of calcium & magnesium

A

sulphates & chlorides

266
Q

Concentration of sulphide ores is done usually by

A

froth floatation

267
Q

Dacron is a/an

A

polyester

268
Q

Sodium carbonate (soda ash) is not used in the manufacture of

A

detergents

269
Q

Viscose rayon

A

utilises H2SO4, NaOH and CS2 during its manufacture.

270
Q

Nylon 6-6 is manufactured from

A

hexamethylene diamine and adipic acid.

271
Q

Glauber’s salt is chemically represented by

A

Na2SO4.10H2O

272
Q

Chemical name of Grignard reagent is

A

ethyl magnesium chloride.

273
Q

Which of the following processes is absent in glass manufacturing process ?

A

Sintering

274
Q

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

A

2.5

275
Q

Dacron (or terylene) fibres as compared to nylon’fibres have

A

all (a), (b) and (c).

276
Q

Grignard reagent is chemically known as

A

ethyl magnesium chloride.

277
Q

The function of gypsum addition during cement making is to

A

decrease the cement setting rate.

278
Q

Low purity oxygen is used for

A

chemical oxidation processes.

279
Q

__________ is produced using molasses as the starting raw material.

A

ethyl alcohol

280
Q

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have

A

sharp melting points.

281
Q

A substance produced by a living organism and capable of anti-microbial activity is called a/an

A

antibiotic

282
Q

Deaeration of water in its treatment is necessary, as it

A

minimises its corrosiveness.

283
Q

Hydrochloric acid is also known as

A

muriatic acid

284
Q

Aryl benzene sulphonate (ABS) is a

A

detergent

285
Q

Adipic acid is an intermediate in the manufacture of

A

nylon-66

286
Q

The temperature in the calcium carbide furnace is __________ °C.

A

2000-2200

287
Q

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

A

4 kgf/cm2 & 500°C.

288
Q

Soaps remove dirt by

A

none of these.

289
Q

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?

A

Calcium & aluminium stearate

290
Q

Chemical name of soda ash is

A

none of theseOut of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

291
Q

Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

A

neutral sulphite semi-chemical

292
Q

__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.

A

Limestone

293
Q

Gun powder uses

A

all (a), (b), & (c)

294
Q

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

A

trichloroethane

295
Q

The basic difference between vegetable oils and fats is in their

A

physical state

296
Q

Which of the following is not a food additive?

A

Ammonium chloride

297
Q

Alum is commercially produced from

A

bauxite

298
Q

CaO is called

A

quick lime

299
Q

Starting raw material for the manufacture of maleic anhydride is

A

either (a) or (b)

300
Q

Pick out the wrong statement.

A

Presence of sodium sulphate in pulp makes the pulp bleachability poor.

301
Q

Which of the following contains least amount of N2 ?

A

Coke oven gas

302
Q

Calcination of limestone is not done in a __________ kiln for producing lime.

A

fixed bed

303
Q

Neoprene is a

A

synthetic rubber

304
Q

Saponification value/number of an oil or fat is a measure of its

A

average molecular weight.

305
Q

Ethyl alcohol cannot be produced

A

none of these.

306
Q

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

A

15-30

307
Q

Cement mainly contains

A

CaO, SiO2, Al2O3

308
Q

Sand and __________ is fused at 1300°C, to produce sodium silicate.

A

soda ash

309
Q

Coke used for the production of calcium carbide should have

A

all (a), (b) and (c).

310
Q

Sucrose is a disaccharide consisting of

A

glucose and fructose

311
Q

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

A

remove unexposed silver halide.

312
Q

High temperature carbonisation of coal takes place at __________ °C.

A

1100

313
Q

White phosphorous is stored under water, because

A

its kindling temperature in dry air is very low.

314
Q

__________ is not a constituent of gun powder.

A

Carbon

315
Q

Hydrophilic group of a soap or detergent solution is

A

water loving

316
Q

Rotary kiln is not involved in the production of

A

slaked lime from quick lime

317
Q

Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.

A

60-70

318
Q

Vanillin is a type of

A

flavour

319
Q

Temporary hardness of water can be removed by

A

boiling

320
Q

More than 100 percent of __________ is present in oleum.

A

H2SO4

321
Q

Pure rectified spirit contains about __________ percent alcohol.

A

95

322
Q

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

A

-183

323
Q

Titanium dioxide is a/an __________ colour pigment.

A

white

324
Q

Mercury cells for caustic soda manufacture, compared to diaphragm cells

A

none of these.

325
Q

Cellulose percentage in bamboo fibre is about

A

50

326
Q

Essential oils are usually obtained using

A

steam distillation

327
Q

Impurities present in brine is normally removed by treatment with

A

all (a), (b) and (c).

328
Q

Hydrogenation of oil/fat does not

A

none of these.

329
Q

Solvay process as compared to dual process (i.e. modified Solvay process)

A

both (b) and (c).

330
Q

Builders are added in soap to act as

A

cleaning power booster

331
Q

H2S is scrubbed from refinery gases by absorption using

A

ethanol amine

332
Q

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?

A

Oxidation of Cl- ions

333
Q

Zeolite is a/an

A

naturally occuring clay which is capable of exchanging cations.

334
Q

Type of glass used in optical work is the __________ glass.

A

lead

335
Q

Pick out the wrong statement pertaining to the soap manufacture.

A

Transparent soaps are made by cold process.

336
Q

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?

A

Teflon

337
Q

Glass is

A

a super cooled liquid

338
Q

Analgesic drugs are

A

pain relievers

339
Q

Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.

A

-183

340
Q

Commonly used glass is known as the __________ glass.

A

soda

341
Q

Fusion of limestone and __________ produces high alumina cement.

A

bauxite

342
Q

Massacuits is a terminology used in the __________ industry.

A

sugar

343
Q

The basic constituent of vegetable oils is

A

triglyceride

344
Q

The most economical pulp for the production of newsprint would be the __________ pulp.

A

groundwood

345
Q

Which of the following is the second major component of cement ?

A

SiO2

346
Q

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

A

all (a), (b) and (c).

347
Q

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.

A

Chromates

348
Q

L.D. converter is used in the production of

A

steel

349
Q

The terminology ‘BTX’ used in coal tar distillation industry refers to

A

benzene-toluene-xylene.

350
Q

Which of the following is not responsible for causing permanent hardness of water ?

A

Ca(HCO3)2

351
Q

In the Solvay process, the product from the calciner is

A

light soda ash

352
Q

Commercially ethylene is produced from naphtha by

A

hydrocracking

353
Q

Poly Vinyl Chloride (P.V.C.) is a __________ material.

A

thermoplastic

354
Q

Pig iron is produced by blast furnaces in India using mostly the iron ore named

A

hematite

355
Q

The difference between saponification value and acid value is

A

called ester value.

356
Q

Fourdrinier machine is used in the manufacture of

A

paper

357
Q

Pencillin is made employing __________ fermentation process.

A

aerobic batch

358
Q

Sulphuric acid saturated with SO3 is called

A

oleum

359
Q

Nylon 66 is so named because the

A

average degree of polymerisation of the polymer is 1966.

360
Q

Wet chlorine gas produced during electrolysis of brine is dehydrated by

A

spraying 66° Be H2SO4 counter current to the flow of the gas.

361
Q

CaSO4 .1/2 H2O is known as

A

plaster of Paris

362
Q

__________ of quicklime produces slaked lime.

A

Hydration

363
Q

Main product in calcium carbide-water reaction is

A

C2H2

364
Q

Glauber’s salt is chemically

A

none of these

365
Q

Which of the following fuel gases contains maximum amount of carbon monoxide ?

A

L.D. converter gas

366
Q

Baking soda is chemically represented by

A

NaHCO3

367
Q

P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as

A

teflon

368
Q

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?

A

Depithing

369
Q

Percentage of glycerene present in the spent lye obtained during soap manufacture is about

A

5

370
Q

Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.

A

10

371
Q

Commercial production of Vanaspati is done by __________ of edible vegetable oils.

A

hydrogenation

372
Q

Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?

A

AgO

373
Q

Phenolic antiseptics are added in the __________ soap.

A

medicated

374
Q

Solvay process is used for the manufacture of

A

soda ash

375
Q

A mixture of chlorine & sodium bromide acts as a/an

A

fire retardant

376
Q

Which is a high grade pulp ?

A

Sulphate pulp

377
Q

Stereospecific agents are exemplified by

A

all (a), (b) & (c)

378
Q

Starting material for the production of butadiene in India is

A

ethyl alcohol

379
Q

Yellow phosphorus is transported under

A

water

380
Q

Permanent hardness of water can be removed by

A

passing it through cation & anion exchangers.

381
Q

Celluloid is chemically

A

cellulose nitrate

382
Q

Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of

A

sulphuric acid

383
Q

Which of the following is an explosive ?

A

All (a), (b), and (c)

384
Q

Zeolite is used in the

A

water treatment.

385
Q

Thermoplastic materials

A

none of these.

386
Q

Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of

A

perchloroethylene

387
Q

Salt is added in the kettle during soap manufacture to separate

A

soap from lye.

388
Q

Manufacture of phthalic anhydride uses __________ as a catalyst.

A

V2O5

389
Q

Which of the following is not a product of coal tar distillation ?

A

None of these

390
Q

Teflon is

A

poly tetrafluoroethylene (P.T.F.E.).

391
Q

Chrome tanning and vegetable tanning are done for

A

light & heavy leather respectively.

392
Q

Catalyst used during the manufacture of ‘Vanaspati Ghee’ is

A

nickel

393
Q

Iron ore hametite is concentrated using

A

gravity separation.

394
Q

Refractory bricks burnt at very high temperature have got

A

greater resistance to corrosion by slags.

395
Q

Nitrile rubber is produced by the polymerisation of

A

acrylonitrile and butadiene.

396
Q

Carbon disulphide is mainly used in the production of

A

viscose rayon.

397
Q

99.5% purity oxygen is used in

A

all (a), (b), and (c).

398
Q

Nylon-6 is manufactured from

A

caprolactum

399
Q

Permanent hardness of water can be removed by

A

boiling it with Na2CO3.

400
Q

Sizing material is incorporated in paper to

A

impart resistance to penetration by liquids.

401
Q

Pick out the wrong statement.

A

Oils and fats are alkaloids.

402
Q

Which of the following, when pyrolysed, produces perchloro-ethylene ?

A

Carbon tetrachloride

403
Q

Chemical name of aspirin (an analgesic drug) is

A

acetylsalicylic acid

404
Q

Which is the most efficient absorbant for SO3 out of the following ?

A

98%H2SO4

405
Q

Coal tar is used as a

A

all (a), (b) and (c).

406
Q

Caprolactum (a raw material for nylon-6 manufacture) is produced from

A

benzene

407
Q

The purpose of adding Na2CO3 to water of low alkalinity is to

A

permit the use of alum as a coagulant.

408
Q

Ca(OH)2 is called

A

slaked lime

409
Q

Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about

A

0.1 to 0.5

410
Q

Potassium is kept & transported under

A

kerosene oil

411
Q

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A

electrolytic reduction

412
Q

Bakelite is chemically known as

A

phenol formaldehyde

413
Q

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?

A

H2

414
Q

Phthalic anhydride is made by the

A

oxidation of naphthalene.

415
Q

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

A

cyclo trimethylene trinitramine.

416
Q

Raw material used in alcohol distilleries in India is

A

molasses

417
Q

Oil produced by solvent extraction

A

neither (a) nor (b).

418
Q

High acid value of an oil or fat is an indication of

A

storage under improper conditions.

419
Q

Yeast is used in the manufacture of

A

wine

420
Q

Liquefaction of gases can not be done by

A

merely compressing it beyond critical pressure.

421
Q

Anion exchanger is regenerated usually with

A

NaOH

422
Q

__________ is the major constituent of the Portland cement.

A

Tricalcium silicate

423
Q

Catalytic oxidation of naphthalene produces

A

phthalic anhydride

424
Q

Parathion and Malathion are

A

pesticides

425
Q

Transparent soaps (e.g. Pears) are

A

usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.

426
Q

Dehydrogenation of ethyl benzene produces

A

styrene

427
Q

Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces

A

dacron

428
Q

Lindane is

A

BHC (Benzene Hexa Chloride) containing 99% γ-isomer.

429
Q

Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate

A

is soluble in ammonium chloride and potassium chloride solution.

430
Q

Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

A

Sodium borate

431
Q

In the production of soda ash by Solvay process, the by-product is

A

CaCl2

432
Q

The ideal pulp for the manufacture of paper should have high __________ content.

A

cellulose

433
Q

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A

independent of

434
Q

Which of the following is a constituent of vinegar ?

A

Both (a) and (b)

435
Q

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A

its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced).

436
Q

Kopper-Totzek coal gasifier

A

can give ammonia synthesis gas (H2 + N2).

437
Q

Addition of calcium oxide to water produces

A

all (a), (b) & (c)

438
Q

Sodium bisulphite is used for __________ water.

A

both (a) & (b)

439
Q

Riboflavin is a/an

A

vitamin

440
Q

Flash point of most vegetable oils is about __________ °C.

A

200

441
Q

Presence of sodium tripolyphosphate (an additive) in synthetic detergent

A

facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions).

442
Q

Dense soda ash used in the manufacture of glass, is chemically represented by

A

Na2CO3.H2O

443
Q

Reverse osmosis is normally used for the

A

desalination of brackish water to produce potable (drinking) water.

444
Q

Hydrazine is largely used

A

as rocket fuel.

445
Q

‘Synthesis gas’ meant for the synthesis of organic compound is a variable mixture of

A

CO & H2

446
Q

Litharge is

A

lead oxide

447
Q

Coagulant is used __________ filtration.

A

before

448
Q

10% oleum comprises of 10% free

A

SO3

449
Q

Use of chlorine in the treatment of sewage

A

helps in grease separation.

450
Q

Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.

A

precipitation

451
Q

A unit operation is exemplified by the process of

A

desorption

452
Q

The major constituents of glass are

A

sand, lime and soda ash

453
Q

Margarine is a/an

A

fat

454
Q

Oils and fats are converted to soap in a process called

A

saponification

455
Q

Glycerine can be obtained from

A

fat

456
Q

Blue vitriol is chemically

A

copper sulphate

457
Q

Trinitro-toluene (TNT) is

A

an explosive.

458
Q

Thorium is mainly used

A

for the manufacture of gas mantles.

459
Q

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

A

avoid corrosion.

460
Q

Good quality of edible salt is obtained from brine by the process of

A

vacuum evaporation

461
Q

Electric bulbs are made of __________ glass.

A

flint

462
Q

Which of the following is used as a binding material in soap to improve soap texture ?

A

Borax

463
Q

An alkali metal salt of palmitic acid is known as

A

metallic soap

464
Q

Washing soda is chemically represented by

A

Na2CO3.10H2O

465
Q

Magnesium and calcium __________ cause temporary hardness of water.

A

bicarbonates

466
Q

Which form of sulphur is the most stable at room temperature ?

A

Rhombic

467
Q

Vegetable oils and fats basically differ in their

A

physical state

468
Q

Average sulphur content in Indian pyrites is about __________ percent.

A

35

469
Q

Oil is a/an

A

mixture of glycerides of fatty acids.

470
Q

Which of the following is a constituent of coffee ?

A

Caffeine

471
Q

Which of the following is the main constituent of the mother liquor produced in salt industry ?

A

Bromine

472
Q

Silicon carbide is a/an

A

abrasive

473
Q

Oxygen is produced by fractionation of air using __________ process.

A

either (a) or (b)

474
Q

Trinitrotoluene (TNT), an explosive, is made by the nitration of

A

toluene

475
Q

Which of the following is used as a coagulant in treating turbid water ?

A

Ferric sulphate

476
Q

Carborundum consists mainly of

A

silicon carbide

477
Q

Wax is a

A

mixture of esters of polyhydric alcohols excepting glycerine.

478
Q

Catalyst used in the hydrogenation of oil is

A

nickel

479
Q

Viscose rayon is

A

none of these.

480
Q

Triple superphosphate is manufactured by reacting

A

phosphate rock with phosphoric acid.

481
Q

Use of hydrated lime in water treatment

A

all (a), (b) and (c).

482
Q

Higher vicosity index of a lubricating oil denotes

A

less changes in fluidity of oil with temperature.

483
Q

Le-Blanc process is a primitive process for the manufacture of

A

soda ash

484
Q

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?

A

1000°C

485
Q

Cement setting under water employs a/an __________ process.

A

hydration

486
Q

__________ are added in lacquers to remove film brittleness and to improve adhereness.

A

Plasticisers

487
Q

Washing of coal is done to

A

both(b) and (c).

488
Q

Systemic insecticides

A

are absorbed throughout the plant.

489
Q

Dry ice (solidified CO2) is used for the

A

storage & shipment of frozen foods and ice-creams.

490
Q

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

A

diamine and the dibasic acid.

491
Q

Chemical formula of BHC, which is an insecticide is

A

C6H6Cl6

492
Q

A bio-catalyst produced by living cells which acts independent of the cell is called a/an

A

enzyme

493
Q

Pick out the wrong statement.

A

Benzene hexachloride is not a contact insecticide.

494
Q

The product obtained on mixing calcium oxide with water is called

A

slaked lime

495
Q

The major constituent of black liquor generated during paper manufacture is sodium

A

carbonate

496
Q

Plaster of Paris is

A

both (a) and (b)

497
Q

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an

A

detergent

498
Q

Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.

A

98

499
Q

Coke oven gas consists mainly of

A

H2, & CH4

500
Q

Chemical name of ‘alum’ is

A

aluminium sulphate.

501
Q

Lithopaneis

A

ZnS (white pigment)

502
Q

What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?

A

Cl2, H2 & NaOH solution.

503
Q

__________ acid is the main constituent of cotton seed oil.

A

Linoleic

504
Q

Chemical formula of ‘salt cake’ is

A

Na2SO4

505
Q

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in

A

all (a), (b) and (c).

506
Q

Nicotine is

A

both (a) and (b).

507
Q

Separation of fresh water from sea water can be done by the __________ operation.

A

reverse osmosis

508
Q

Na2CO3.10H2O is called

A

washing soda

509
Q

Reaction of an alcohol with organic acid is called the __________ reaction.

A

esterification

510
Q

Ethanol amine is produced using ammonia and

A

ethylene oxide

511
Q

__________ acid is an unsaturated fatty acid.

A

Oleic

512
Q

CO & H2 are the constituents of

A

all (a), (b) and (c)

513
Q

Economics of ‘Solvay Process’ depends upon the efficiency of

A

ammonia recovery and size of the plant

514
Q

__________ is a thermosetting plastic.

A

Bakelite

515
Q

Na2CO3 is called

A

soda ash

516
Q

Flux addition during smelting of ore is done to

A

remove impurities/gangue.

517
Q

Hydrazine is used in water treatment for the removal of

A

dissolved oxygen

518
Q

Direct conversion of chemical energy into electrical energy is done in a

A

fuel cell.

519
Q

Which of the following is not produced commercially from sea water ?

A

Iodine

520
Q

Pick out the wrong statement.

A

none of these.

521
Q

Nylon-6 as compared to Nylon-66 is having higher

A

none of these

522
Q

Digestion of wood-base materials (for manufacture of pulp) is done to

A

remove lignin.

523
Q

Soap cannot be used with hard water, because

A

they form insoluble calcium soaps which precipitate.

524
Q

Which of the following is not an antibiotic ?

A

Quinine

525
Q

The most reactive allotropic form of phosphorus is __________ phosphorus.

A

yellow

526
Q

Plasticisers are added to synthetic plastics to

A

all (a), (b) and (c).

527
Q

Rosin soap is added during paper manufacture to

A

impart resistance to penetration by liquids.

528
Q

Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by

A

iron-steam reaction.

529
Q

Carboxymethyl cellulose (CMC) is added in detergents to

A

prevent redeposition of soil on cleaned surface.

530
Q

Synthesis gas is a mixture of

A

CO and H2

531
Q

Which of the following impurities in feed water for high pressure boiler is the most detrimental ?

A

Silica

532
Q

Which glass is usually used in optical work?

A

Lead glass

533
Q

Fourdrinier machine is used in the manufacture of

A

paper

534
Q

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.

A

anionic

535
Q

Reaction of calcium carbide with water produces a gas, which is used

A

both (a) & (b).

536
Q

Salt is the basic raw material for the manufacture of

A

caustic soda

537
Q

Pick out the wrong statement.

A

TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.

538
Q

Hydrazine (N2H4) is used mainly as a/an

A

rocket fuel

539
Q

Hydrocynic acid (HCN) is used as an insecticide for

A

citrus fruits

540
Q

Molecular weight of plastics ranges from

A

20000 to 250000

541
Q

Acrylonitrile is mainly used in the __________ industry.

A

dyeing

542
Q

The enzyme which converts starch into the disacharides maltose is

A

diastase

543
Q

Pick out the false statement pertaining to water treatment.

A

The zeolite water softening process reduces the hardness of water by not more than 50%.

544
Q

Presence of H2S in raw water (to be chlorinated) results in the

A

increased dosage of chlorine to provide a disinfecting residual in the water.

545
Q

Contact process of sulphuric acid manufacture

A

yields acid of higher concentration than chamber process.

546
Q

Fat dispersed in water is exemplified by

A

butter

547
Q

Maleic anhydride is produced by catalytic oxidation of

A

benzene

548
Q

Catalyst used in the oxidation of benzene to produce maleic anhydride is

A

V2O5

549
Q

Widely used method for the conditioning of boiler feed water is the

A

hot-lime soda process

550
Q

Blue colour is imparted to glass by the addition of

A

CaO

551
Q

In the manufacture of viscose rayon, the raw material used industrially is

A

fine teak wood

552
Q

Bordeaux mixture is a/an

A

inorganic fungicide

553
Q

Silicone is a/an

A

inorganic polymer

554
Q

Nickel is not used as a catalyst in the __________ reaction.

A

shift conversion

555
Q

Roasting of metallurgical ores is done mainly to

A

remove arsenic & sulphur.

556
Q

Molasses is the starting material for the production of

A

alcohol

557
Q

BHC (Benzene hexachloride) is made by the chlorination of benzene

A

which is an addition reaction.

558
Q

Diaphragm electrolytic cell as compared to mercury electrolytic cell

A

requires lesser investment for similar capacity.

559
Q

Calcareous & argillaceous materials are used in the manufacture of

A

cement

560
Q

Pick out the wrong statement.

A

none of these.

561
Q

Commercial production of calcium carbide requires limestone and __________ as raw materials.

A

coke

562
Q

Which one of the following is not likely to be a constituent of vegetable oils ?

A

Citric acid

563
Q

Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and

A

sulphuric acid

564
Q

The process involved in converting rubber into a thin sheet or coating it on fabric is called

A

calendering

565
Q

Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

A

both (b) and (c)

566
Q

Air used in aerobic fermentation must be sterilized, otherwise the

A

contamination of pure culture would result.

567
Q

Alkylbenzene sulfonate (ABS) is a

A

detergent

568
Q

High temperature carbonisation of coal produces

A

none of these.

569
Q

Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

A

7-14 and 14-30

570
Q

Setting of plaster of paris is accompanied with

A

hydration

571
Q

Process conditions in fermentator used for production of penicillin is

A

25°C, 2 atm.

572
Q

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of

A

arsenic

573
Q

Sodium chloride content in sea water is about __________ gms/litre.

A

25

574
Q

Fluorescent dyes are added in detergents to

A

act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.

575
Q

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

A

both (a) and (b).

576
Q

Polyvinyl chloride (PVC) is

A

made by employing emulsion polymerisation.

577
Q

Bleaching of paper pulp is done with

A

chlorine or chlorine dioxide

578
Q

Pick out the wrong statement.

A

none of these.

579
Q

Isopropyl benzene produced by alkylation of benzene with propylene is known as

A

cumene

580
Q

Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis.

A

i - Ni/Al2O3; ii - Fe/Al2O3

581
Q

For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison.

A

(A) nickel (B) sulphur

582
Q

Main constituents of natural rubber is

A

polyisoprene

583
Q

Highly porous refractory bricks are

A

none of these.

584
Q

Fumigant insecticides

A

emit poisonous vapour.

585
Q

Which of the following is an endothermic reaction ?

A

Both (b) and (c).

586
Q

Fermentator temperature during production of alcohol from molasses is around __________ °C.

A

30

587
Q

Which of the following coals has the highest calorific value ?

A

Anthracite

588
Q

Which of the following is not an abrasive material ?

A

Bakelite

589
Q

Pick out the wrong statement.

A

Red color is imparted to glass by addition of arsenic oxide.

590
Q

Finely ground calcium aluminate & silicate is a/an

A

cement

591
Q

Cooking liquor in case of sulphite process is

A

sodium sulphite and sodium bisulphite.

592
Q

90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

A

10-30

593
Q

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

A

non-drying

594
Q

Fats as compared to oils have

A

less unsaturated glycerides of fatty acids.

595
Q

Thermal pyrolysis of ethylene dichloride produces

A

vinyl chloride

596
Q

The main component of pyrex glass is

A

lead

597
Q

Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove

A

all (a), (b) and (c)

598
Q

__________ is an ore concentrating metallurgical process involving a chemical change.

A

Roasting

599
Q

Basic oxide is absent in __________ glass.

A

quartz

600
Q

Graphite is a/an

A

both (b) and (c).

601
Q

Nylon-6 is a

A

polyamide

602
Q

Enzymes are

A

all (a), (b) and (c).

603
Q

Multistage catalytic converter is not used in the

A

NH3 synthesis reaction.

604
Q

The main product of high temperature carbonisation of coal is

A

coke

605
Q

__________ is a thermosetting plastic.

A

Epoxy polymer

606
Q

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

A

(NH4)2SO4

607
Q

Flexible foam (for mattresses) is usually made of

A

polyurethanes

608
Q

Glycerine is a by-product of the __________ industry.

A

soap

609
Q

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

A

adjust the pH of the syrup.

610
Q

Permanent hardness of water can be removed by

A

all (a), (b), and (c).

611
Q

Chalcopyrite is the main ore of

A

copper

612
Q

The end bleaching agent used to move last traces of colour bodies from the pulp is

A

chlorine dioxide (ClO2)

613
Q

Bio-degradable detergents

A

can be readily oxidised.

614
Q

Sea water contains about __________ ppm of bromine.

A

70

615
Q

Which allotrope of sulphur is insoluble in carbon disulphide ?

A

Plastic sulphur

616
Q

Lubricating greases are a mixture of

A

mineral oil, soap and additives.

617
Q

Metallic soap is __________ salt of fatty acids.

A

aluminium or calcium

618
Q

Cation exchanger is regenerated usually with

A

H2SO4

619
Q

In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because

A

water forms an acid mist, which is difficult to absorb.

620
Q

Bitterns is a/an

A

none of these.

621
Q

The most widely used coagulant for removing suspended impurities from water is

A

alum

622
Q

Main constituent of limestone is

A

CaCO3

623
Q

__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.

A

Chlorine

624
Q

Fat splitting catalyst is

A

ZnO

625
Q

Phthalic anhydride is used

A

as plasticisers

626
Q

Penicillin is separated from fermented broth by

A

extraction with amyl or butyl acetate.

627
Q

__________ process is used for producing soda ash.

A

Solvay

628
Q

Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on

A

slaked lime

629
Q

Which of the following is an unsaturated fatty acid ?

A

Oleic acid

630
Q

The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

A

3

631
Q

__________ is used as a flux in the smelting of copper ore like chalcopyrite.

A

Silica/quartz

632
Q

Phenol formaldehyde is produced by condensation polymerisation. It is also known as

A

bakelite

633
Q

Hydrogenation of oil does not

A

none of these.

634
Q

Main constituents of cotton fiber is

A

cellulose

635
Q

CaCl(OCl) is the chemical formula of

A

bleaching powder

636
Q

Which is the most suitable dye for synthetic fibres ?

A

Acid dye

637
Q

Pick out the wrong statement.

A

none of these.

638
Q

Pick out the wrong statement.

A

Acetylene gas can not be used for illumination purpose.

639
Q

Hydrolysis of sugar is called

A

inversion

640
Q

Sulphuric acid completely saturated with sulphur trioxide is called

A

concentrated sulphuric acid.

641
Q

Fish contains about __________ percent oil.

A

20

642
Q

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

A

avoid mechanical weakening of fibre.

643
Q

Polymethyl methacrylate (PMMA) is known as

A

perspex

644
Q

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

A

copper

645
Q

Percentage of alcohol in beer may be around __________ percent.

A

2-8

646
Q

Which of the following is an ore of iron ?

A

Hematite

647
Q

Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?

A

NH3

648
Q

High purity nitrogen is used in

A

both (a) & (b).

649
Q

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

A

brine and coal

650
Q

Naphthalene is removed from coke oven gas by

A

scrubbing with wash oil.

651
Q

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.

A

1600

652
Q

Which of the following is not present in bagasse fibre ?

A

None of these

653
Q

Nitric acid is not used in the manufacture of

A

detergents

654
Q

Naphthols are derivates of

A

naphthalene

655
Q

Fermentation is adversely affected by the

A

high concentration.

656
Q

Extraction of __________ employs an electrolytic process.

A

aluminium

657
Q

Dechlorination of treated water is necessary to

A

remove chlorinous taste.

658
Q

Fire clay is __________ refractory material.

A

an acidic

659
Q

An oil is converted into fat by its

A

hydrogenation

660
Q

Production of one ton of cement requires about __________ tons of limestone.

A

1.2

661
Q

Low temperature carbonisation of coal takes place at __________ °C.

A

700

662
Q

Shaving soaps are

A

soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.

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