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PROB SOLVING PBE > (1) CPI I > Flashcards

(1) CPI I Flashcards

1
Q

Oxidation of SO2 to SO3 is favoured by
a. low temperature and low pressure.
b. low temperature and high pressure.
c. high temperature and low pressure.
d. high temperature and high pressure.

A

b. low temperature and high pressure.

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2
Q

Gun powder, which is an explosive comprises of charcoal, sulphur and
a. glycerene
b. salt petre
c. nitro glycerene
d. dynamite

A

b. salt petre

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3
Q

Starting raw material for the manufacture of alum is
a. alumina
b. gypsum
c. bauxite
d. ammonium bicarbonate

A

c. bauxite

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4
Q

Salt cake is chemically represented by
a. Na2SO4
b. CaSO4 (1/2)H2O
c. MgSO4
d. BaSO4

A

a. Na2SO4

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5
Q

Which of the following sugars is the sweetest?
a. Glucose
b. Fructose
c. Sucrose
d. Lactose

A

b. Fructose

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6
Q

Paper pulp produced by kraft/sulphate process is
-bleached easily
-dull white in color
-strong fibrous
-dark colored

A

-strong fibrous

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7
Q

Claude process of gas liquefaction employs
-merely compression of gas beyond its critical pressure.
-Joule-Thomson expansion cooling.
-heat exchange with colder stream.
-adiabatic expansion against a piston or in a turbine.

A

-adiabatic expansion against a piston or in a turbine

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8
Q

The main use of HCl is in the
-drilling of petroleum wells and pickling of steel sheets.
-manufacture of cationic detergent.
-treatment of spent fuel of nuclear reactor.
-none of these.

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.
-exothermic
-endothermic
-catalytic
-autocatalytic

A

-endothermic

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10
Q

Viscose rayon is chemically
-cellulose nitrate
-regenerated cellulose nitrate
-cellulose acetate
-regenerated cellulose acetate

A

-regenerated cellulose acetate

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11
Q

All enzymes are made of
-fats
-carbohydrates
-proteins
-amino acids

A

proteins

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12
Q

The combustion reaction, C + O2 = CO2, is
-exothermic
-endothermic
-autocatalytic
-none of these

A

-exothermic

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13
Q

Styrene is produced from ethyl benzene by the process of
-dehydrogenation
-oxidation
-alkylation
-dehydration

A

-dehydrogenation

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14
Q

Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
-callagen
-tannin
-molasses
-carbohydrate

A

-callagen

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15
Q

The chamber process is
-preferred over contact process for producing 98 to 100% H2SO4 and various oleums.
-non-catalytic and operates only on pyrites.
-a batch process for directly producing high strength (98 to 100%) H2SO4.
-none of these.

A

-none of these.

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16
Q

Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
1 - 2
15 - 20
50 - 60
80 - 85

A

15 - 20

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17
Q

Fusel oil is a/an
-essential oil.
-extract from medicinal herbs.
-mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
-none of these.

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
-Poorer tensile strength.
-poorer resistance to oxidation.
-greater amount of heat build-up under heavy loading.
-all (a), (b) and (c).

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.
CaO
MnO2
ZnO
FeS

A

ZnO

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20
Q

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
-dilute H2SO4
-oleum
-ultraviolet light
-none of these

A

oleum

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21
Q

Haemoglobin is a/an
-amino acid
-biological catalyst
-protein
-enezyme

A

protein

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22
Q

Epoxy resin
-is a good adhesive.
-is an elastomer.
-cannot be used for surface coatings.
-is a polyester.

A

-is a good adhesive.

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23
Q

Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
10
25
50
98

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?
-High cost of mercury.
-High specific gravity of mercury.
-Non-availability of high purity mercury.
-Pollution of water stream by mercury.

A

-Pollution of water stream by mercury.

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25
Q

Esterification reaction produces
-detergent
-vanaspati
-soap
-mercaptans

A

soap

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26
Q

Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
-adsorbs
-oxidises
-reduces
-converts

A

adsorbs

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27
Q

Producer gas consists mainly of
-CO, CO2 N2, H2
-CO, H2
-H2, CH4
-C2H2, CO2, H2

A

CO, CO2 N2, H2

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28
Q

Neoprene is the trade name of
-polyurathane
-phenol formaldehyde
-polychloroprene
-styrene-butadiene rubber

A

-polychloroprene

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29
Q

Hard water
-does not affect the lather formation by soap.
-is not unfit for drinking purpose.
-pollutes the water stream.
-all (a), (b) and (c).

A

-is not unfit for drinking purpose.

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30
Q

Which of the following is an organo-metal-lic compound ?
-Isopropyl alcohol
-Tetra-ethyl lead
-Zeolite
-Cumene

A

-Tetra-ethyl lead

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31
Q

Sulphur addition in soap is done to
-improve the soap texture.
-cure pimples & dandruff.
-fasten lather formation.
-increase its cleansing action.

A

-cure pimples & dandruff.

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32
Q

Phosphate rock is a raw material for the manufacture of
-phosphoric acid
-phosphorous
-superphosphates
-all (a), (b) and (c)

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
-poor oxidation stability and high gum forming tendency.
-greater tendency of decomposition at elevated temperature.
-hydrolysis tendency in presence of water.
-all (a), (b) and (c).

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?
-Iron oxide
-Soda ash
-Limestone
-Silica

A

-Iron oxide

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35
Q

Esterification reaction
-produces soap.
-is reversible.
-is a reaction between an alcohol and an organic acid.
-all (a), (b) and (c).

A

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

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36
Q

In sulphate pulp manufacture, the pressure and temperature in the digestor is
-10 atm., 800 °C
-10 atm., 170-180°C
-1 atm., 170 - 180°C
-l atm., 800°C

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
-calcium sulphate
-sodium chloride
-sodium sulphate
-magnesium chloride.

A

-sodium chloride

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38
Q

Pick out the endothermic reaction out of the following.
C+1/2 O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO + 1/2 O2 = CO2

A

CaCO3 = CaO + CO2

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39
Q

Pasteurisation of milk means
-removal of fatty and albuminous substance from it.
-killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
-inhibiting the growth of micro-organisms without killing them.
-none of these.

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.
-alum
-limestone
-coke
-quartz

A

limestone

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41
Q

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
-Ostwald’s
-Bosch
-Solvay
-Haber’s

A

Solvay

42
Q

Polycaprolactum is commercially known as
-nylon-6
-nylon-66
-dacron
-rayon

A

-nylon-6

43
Q

Frasch process is for
-making oxygen
-producing helium
-mining sulphur
-making nitrogen

A

-mining sulphur

44
Q

Very fine suspended and colloidal impurities are removed from water by a process called
-sedimentation
-coagulation
-disinfection
-softening

A

coagulation

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
-its calorific value is very less.
-tar neutralises the residual acids present in pitch.
-it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
-all (a), (b) and (c).

A

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

46
Q

Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
-C
-CO
-CO2
-H2

A

CO

47
Q

The drug used in contraceptives is
-sulphadizene
-mestranol
-methyl salicylate
-pencillin

A

mestranol

48
Q

Raw materials used for producing __________ cement does not contain iron oxide.
-waterproof
-slag
-white
-pozzolan

A

white

49
Q

In the Lurgi coal gasifier
-coking coals cannot be used.
-low carbon conversion efficiency is achieved.
-entrainment of solids is higher.
-large quantity of coal can be processed.

A

-large quantity of coal can be processed.

50
Q

Neon gas is
-flammable in nature.
-used in color discharge tube.
-filled in lamps having tungsten filament.
-all (a), (b) and (c).

A

-used in color discharge tube.

51
Q

Calgon used in water treatment is chemically
-sodium phosphate
-sodium hexametaphosphate
-calcium phosphate
-tricresyl phosphate

A

-sodium hexametaphosphate

52
Q

Which oil is preferred for paint manufacture ?
-Drying oil
-Non-drying oil
-Semi-drying oil
-Saturated oil

A

-Drying oil

53
Q

Styrene butadiene rubber (SBR) is
-a natural rubber.
-a synthetic polymer.
-a synthetic monomer.
-another name of silicone rubber.

A

-a synthetic polymer.

54
Q

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
-1 atm & 100°C
-5 atm & 275°C
-100 atm & 500°C
-50 atm & 1000°C

A

-5 atm & 275°C

55
Q

Glycerine is not used in the
-manufacture of explosive.
-conditioning and humidification of tobacco.
-manufacture of pharmaceuticals.
-none of these.

A

-none of these.

56
Q

Cumene is the starting material for the production of
-benzoic acid
-phenol and acetone
-isoprene
-styrene

A

-phenol and acetone

57
Q

The type of high refractive index glass used in optical instruments is __________ glass.
-pyrex
-flint
-crookes
-none of these

A

flint

58
Q

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

A

vanadium

59
Q

Most commonly used rubber vulcanising agent is
-sulphur
-bromine
-platinum
-alumina

A

sulphur

60
Q

Terylene is
-same as dacron
-a polyester
-both (a) & (b)
-neither (a) nor(b)

A

-both (a) & (b)

61
Q

Free alkali in a toilet soap is __________ that in a laundary shop.
-less than
-more than
-same
-none of these

A

-less than

62
Q

Dehydrogenation of isopropanol produces
-propyl alcohol
-acetone
-trichloroethylene
-formaldehyde

A

acetone

63
Q

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

A

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

64
Q

Concentration of hydrogen peroxide is done by
-crystallisation
-vacuum crystallisation
-atmospheric distillation
-dehydration

A

-vacuum crystallisation

65
Q

Helium is produced on commercial scale from
-air
-natural gas
-coke oven gas
-none of these

A

-natural gas

66
Q

Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
< - 5
100 - 150
250 - 300

A

20 - 30

67
Q

The catalyst used in the manufacture of DDT is
-alumina.
-silica.
-20% oleum.
-aluminium chloride.

A

-20% oleum.

68
Q

Most widely and commonly used coagulant for the removal of suspended impurities in water is
-bleaching powder
-slaked lime
-alum
-copper sulphate

A

alum

69
Q

_________ is used as a catalyst in fat splitting.
ZnO
Ni
V2O5
FeO

A

ZnO

70
Q

Which of the following is not produced on commercial scale from sea water?
-Bromine.
-Magnesium compounds.
-Potassium compounds.
-Sodium sulphate.

A

-Sodium sulphate.

71
Q

Heating of __________ to 120°C, produces plaster of paris.
-blue vitriol
-gypsum
-calcium silicate
-calcium sulphate

A

gypsum

72
Q

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

A

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

73
Q

Which of the following has sodium bicarbonate as its main constituent ?
-Baking soda
-Baking powder
-Washing soda
-none of these

A

-Baking powder

74
Q

Ordinary glass is not a/an
-amorphous isotropic material.
-supercooled liquid.
-material with sharp definite melting point.
-electrical insulator.

A

-material with sharp definite melting point.

75
Q

In premitive days, __________ was being manufactured by Leblanc Process.
-alum
-washing soda
-soda ash
-calcium carbide

A

-soda ash

76
Q

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
-SASOL (in South Africa).
-Redcar (U.K.).
-Los-Angles (U.S.A.).
-Trombay (India).

A

-SASOL (in South Africa).

77
Q

Lurgi coal gasifier is a pressurised __________ bed reactor.
-moving
-fixed
-fluidised
-entrained

A

moving

78
Q

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
-cause cholesterol build up and blood clotting.
-are prone to rancid oxidation.
-always contain some amount of nickel (as their complete removal is very difficult).
-have affinity to retain harmful sulphur compounds.

A

-cause cholesterol build up and blood clotting.

79
Q

Paper grade bamboo contains about __________ percent cellulose.
5
20
40
60

A

5

80
Q

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
-surfactant
-builder
-optical brightening agent
-anti soil redeposition agent

A

-anti soil redeposition agent

81
Q

Vulcanisation of rubber
-decreases its tensile strength.
-increases its ozone & oxygen reactivity.
-increases its oil & solvent resistance.
-converts its plasticity into elasticity.

A

-converts its plasticity into elasticity.

82
Q

Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
-salt, limestone and coke or gas.
-ammonia, salt and limestone.
-ammonia limestone and coke.
-none of these.

A

-salt, limestone and coke or gas.

83
Q

Chloral is used in the manufacture of
-DDT
-BHC
-parathion
-none of these

A

DDT

84
Q

Bromine is used in the preparation of
-fire extinguishing compounds.
-fire proofing agents.
-dyes and antiknock compounds.
-all (a), (b) and (c).

A

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

85
Q

Sudden temperature fluctuation does not affect pyrex glass, because of its
-low co-efficient of expansion.
-high co-efficient of expansion.
-high melting point.
-both (b) and (c).

A

-low co-efficient of expansion.

86
Q

The process used for the manufacture of ethyl alcohol from molasses is
-distillation
-dehydration
-dehydrogenation
-none of these

A

-none of these

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.
75
< 10
> 30
50

A

< 10

88
Q

Absorption of SO3 in 97% H2SO4 is
-exothermic
-endothermic
-not possible
-none of these

A

exothermic

89
Q

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
-Solvay
-Ostwald’s
-Haber’s
-none of these

A

Ostwald’s

90
Q

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
-fertiliser manufacture
-car battery solution
-synthesis of oleum
-water treatment

A

-car battery solution

91
Q

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
-alumina
-silica gel
-platinum
-nickel

A

-alumina

92
Q

A good quality coal should have
-low fusion point of ash
-high ash content
-high sulphur content
-none of these

A
93
Q

Zeolite used in water softening process (cation exchange) is regenerated by washing with
-brine
-chloramines
-sodium bisulphite
-liquid chlorines

A

brine

94
Q

The catalyst used in shift converter is
-nickel
-vanadium
-silica gel
-alumina

A

nickel

95
Q

Which of the following is a detergent?
-Benzene hexachloride
-Alkyl benzene sulphonate
-Polytetraflouroethylene
-Cellulose nitrate

A

-Alkyl benzene sulphonate

96
Q

Drinking (potable) water treatment does not involve
-coagulation
-sedimentation
-softening
-disinfection

A

softening

97
Q

Phenol formaldehyde resin is used as an adhesive in making
-laminates
-card boxes
-furniture
-books

A

laminates

98
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.

99
Q

DDT should not be allowed to come in contact with iron (during its manufacture) to
-avoid its decomposition.
-prevent sulphonation of the monochlorobenzene by the acid catalyst.
-achieve non-hygroscopic property.
-none of these.

A

-avoid its decomposition.

100
Q

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
-V2O5 & Cr2O3.
-oxides of nitrogen & Cr2O3.
-V2O5 on a porous carrier & oxides of nitrogen.
-oxides of nitrogen & V2O5 on a porous carrier.

A

-oxides of nitrogen & V2O5 on a porous carrier.

PROB SOLVING PBE (11 decks)

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