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INDIABIX > CHEMICAL PROCESS > Flashcards

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

Which of the following sugars is the sweetest?

A

FRUCTOSE

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4
Q

Salt cake is chemically represented by

A

Na2SO4

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5
Q

Paper pulp produced by kraft/sulphate process is

A

STRONG FIBROUS

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6
Q

Claude process of gas liquefaction employs

A

adiabatic expansion against a piston or in a turbine.

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7
Q

The main use of HCl is in the

A

drilling of petroleum wells and pickling of steel sheets.

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8
Q

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

A

endothermic

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9
Q

Viscose rayon is chemically

A

regenerated cellulose acetate

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10
Q

All enzymes are made of

A

proteins

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11
Q

The combustion reaction, C + O2 = CO2, is

A

exothermic

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12
Q

Styrene is produced from ethyl benzene by the process of

A

dehydrogenation

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13
Q

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

A

callagen

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14
Q

The chamber process is

A

NONE OF THESE HAHA

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15
Q

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

A

15-20

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16
Q

Fusel oil is a

A

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

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17
Q

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

A

Poorer tensile strength.
poorer resistance to oxidation.
greater amount of heat build-up under heavy loading.

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18
Q

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

A

ZnO

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19
Q

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

A

OLEUM

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20
Q

Haemoglobin is a/an

A

enzyme

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21
Q

Epoxy resin

A

is a good adhesive

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22
Q

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

A

50

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23
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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24
Q

Esterification reaction produces

A

soap

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25
Q

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

A

adsorbs

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26
Q

Producer gas consists mainly of

A

CO, CO2 N2, H2

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27
Q

Neoprene is the trade name of

A

polychloroprene

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28
Q

Hard water

A

is not unfit for drinking purpose.

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29
Q

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

A

Tetra-ethyl-lead

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30
Q

Sulphur addition in soap is done to

A

cure pimples & dandruff.

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31
Q

Phosphate rock is a raw material for the manufacture of

A

phosphoric acid
phosphorous
superphosphates

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32
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

poor oxidation stability and high gum forming tendency.
greater tendency of decomposition at elevated temperature.
hydrolysis tendency in presence of water.

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33
Q

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

A

iron oxide

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34
Q

Esterification reaction

A

produces soap.
is reversible.
is a reaction between an alcohol and an organic acid.

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35
Q

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

A

10 atm, 170-180C

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36
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

NaCl

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37
Q

Pick out the endothermic reaction out of the following.
C+O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO +O2 = CO2

A

C

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38
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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39
Q

Fusion of bauxite and __________ produces high alumina cement.

A

limestone

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40
Q

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

A

solvay

41
Q

Polycaprolactum is commercially known as

A

nylon 6

42
Q

Frasch process is for

A

mining sulphur

43
Q

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

A

coagulation

44
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.

45
Q

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

A

CO

46
Q

The drug used in contraceptives is

A

mestranol

47
Q

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

A

white

48
Q

In the Lurgi coal gasifier

A

large quantity of coal can be processed.

49
Q

Neon gas is

A

used in color discharge tubes

50
Q

Calgon used in water treatment is chemically

A

sodium hexametaphosphate

51
Q

Which oil is preferred for paint manufacture ?

A

drying oil

52
Q

Styrene butadiene rubber (SBR) is

A

synthetic polymer

53
Q

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

A

5 atm & 275°C

54
Q

Glycerine is used in the

A

manufacture of explosive.
conditioning and humidification of tobacco.
manufacture of pharmaceuticals.

55
Q

Cumene is the starting material for the production of

A

phenol and acetone

56
Q

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

A

flint

57
Q

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

A

vanadium

58
Q

Most commonly used rubber vulcanising agent is

A

sulphur

59
Q

Terylene is

A

same as dacron
a polyester

60
Q

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

A

<

61
Q

Dehydrogenation of isopropanol produces

A

acetone

62
Q

Pick out the wrong statement.
A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
B. Soap powder is prepared by mixing soap with hydrated sodium carbonate.
C. Detergents differ from soaps in their action in hard water.
D. Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.

A

d

63
Q

Concentration of hydrogen peroxide is done by

A

vacuum crystallization

64
Q

Helium is produced on commercial scale from

A

natural gas

65
Q

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

A

20-30

66
Q

The catalyst used in the manufacture of DDT is

A

20% oleum

67
Q

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

A

alum

68
Q

__________ is used as a catalyst in fat splitting.

A

Zno

69
Q

Which of the following is produced on commercial scale from sea water?

A

Bromine.
Magnesium compounds.
Potassium compounds.

70
Q

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

A

gypsum

71
Q

Pick out the wrong statement.
A. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%.
B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide.
C. Vitriol oil is nothing but technical sulphuric acid.
d. Decomposition of sulphuric acid on heating does not start before its boiling.

A

d

72
Q

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

A

baking powder

73
Q

Ordinary glass is not a/an

A

material with sharp definite melting point.

74
Q

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

A

soda ash

75
Q

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

A

SASOL (in South Africa).

76
Q

Lurgi coal gasifier is a pressurised __________ bed reactor.

A

moving

77
Q

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

A

cause cholesterol build up and blood clotting

78
Q

Paper grade bamboo contains about __________ percent cellulose.

A

5

79
Q

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

A

anti soil redeposition agent

80
Q

Vulcanisation of rubber

A

converts its plasticity into elasticity.

81
Q

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

A

salt, limestone and coke or gas.

82
Q

Chloral is used in the manufacture of

A

DDT

83
Q

Bromine is used in the preparation of

A

fire extinguishing compounds.
fire proofing agents.
dyes and antiknock compounds.

84
Q

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

A

low co-efficient of expansion.

85
Q

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

A

NONE OF THESE SKSKSKS

86
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

87
Q

Absorption of SO3 in 97% H2SO4 is

A

EXOTHERMIC

88
Q

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

A

OSTWALD’S

89
Q

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

A

CAR BATTERY SOLUTION

90
Q

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

A

ALUMINA

91
Q

A good quality coal should have

A

NONE OF THSE

92
Q

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

A

BRINE

93
Q

The catalyst used in shift converter is

A

Ni

94
Q

Which of the following is a detergent ?

A

Alkyl benzene sulphonate

95
Q

Drinking (potable) water treatment does not involve

A

softening

96
Q

Phenol formaldehyde resin is used as an adhesive in making

A

laminates

97
Q

Pick out the correct statement.
A fat is converted into oil by its hydrogenation.
There is no difference between a fat and an oil so far as its physical properties are concerned.
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.

A

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

98
Q

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

A

avoid its decomposition

99
Q

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

A

oxides of nitrogen & V2O5 on a porous carrier.

100
Q
A

INDIABIX (11 decks)

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