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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/ potassium nitrate

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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

Styrene is produced from ethyl benzene by the process of

A

dehydrogenation

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12
Q

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

A

callagen

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13
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. method of producing sulfuric acid by oxidizing sulfur dioxide with moist air, using gaseous nitrogen oxides as catalysts

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14
Q

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

A

15 - 20

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15
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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16
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 of these

A

all of these

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17
Q

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

A

ZnO

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18
Q

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

A

oleum

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19
Q

Haemoglobin is a/an

A

protein

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20
Q

Epoxy resin

A

is a good adhesive.

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21
Q

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

A

50

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22
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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23
Q

Esterification reaction produces

A

soap

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24
Q

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

A

adsorbs

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25
Q

Producer gas consists mainly of

A

CO, CO2 N2, H2

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26
Q

Neoprene is the trade name of

A

polychloroprene

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27
Q

Hard water

does not affect the lather formation by soap.

is not unfit for drinking purpose.

pollutes the water stream.

A

is not unfit for drinking purpose.

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28
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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29
Q

Sulphur addition in soap is done to

A

cure pimples & dandruff.

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30
Q

Phosphate rock is a raw material for the manufacture of

phosphoric acid
phosphorous
superphosphates

A

all of these

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31
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.

A

All of these

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32
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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33
Q

Esterification reaction

produces soap.

is reversible.

is a reaction between an alcohol and an organic acid.

A

All of these

34
Q

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

A

10 atm., 170-180°C

35
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

36
Q

Pick out the endothermic reaction out of the following.

A

CaCO3 = CaO + CO2

37
Q

Pasteurisation of milk means

A

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

38
Q

Fusion of bauxite and __________ produces high alumina cement.

A

limestone

39
Q

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

A

Solvay

40
Q

Polycaprolactum is commercially known as

A

nylon-6

41
Q

Frasch process is for

A

mining sulphur

42
Q

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

A

coagulation

43
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.

44
Q

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

C
CO
CO2
H2

A

CO

45
Q

The drug used in contraceptives is

A

mestranol

46
Q

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

A

white

47
Q

In the Lurgi coal gasifier

A

large quantity of coal can be processed.

48
Q

Neon gas is

A

used in color discharge tube.

49
Q

Calgon used in water treatment is chemically

A

sodium hexametaphosphate

50
Q

Which oil is preferred for paint manufacture ?

A

Drying oil

51
Q

Styrene butadiene rubber (SBR) is

A

a synthetic polymer.

52
Q

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

A

5 atm & 275°C

53
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

54
Q

Cumene is the starting material for the production of

A

phenol and acetone

55
Q

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

A

flint

56
Q

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

nickel
vanadium
alumina
iron

A

vanadium

57
Q

Most commonly used rubber vulcanising agent is

A

sulphur

58
Q

Terylene is
same as dacron
a polyester
both (a) & (b)

A

both (a) & (b)

59
Q

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

A

less than

60
Q

Dehydrogenation of isopropanol produces

A

Acetone

61
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.

62
Q

Concentration of hydrogen peroxide is done by

A

vacuum crystallisation

63
Q

Helium is produced on commercial scale from

A

natural gas

64
Q

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

A

20 - 30

65
Q

The catalyst used in the manufacture of DDT is

A

20% oleum.

66
Q

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

A

alum

67
Q

__________ is used as a catalyst in fat splitting.

A

ZnO

68
Q

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

A

Sodium sulphate.

69
Q

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

A

Gypsum

70
Q

Pick out the wrong statement.

A

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

71
Q

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

A

Baking powder

72
Q

Ordinary glass is not a/an

A

material with sharp definite melting point.

73
Q

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

A

soda ash

74
Q

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

A

SASOL (in South Africa).

75
Q

Lurgi coal gasifier is a pressurised __________ bed reactor.

A

moving

76
Q

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

A

cause cholesterol build up and blood clotting.

77
Q

Paper grade bamboo contains about __________ percent cellulose.

A

5

78
Q

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

A

anti soil redeposition agent

79
Q

Vulcanisation of rubber

A

converts its plasticity into elasticity.

80
Q

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

A

salt, limestone and coke or gas.

81
Q

Chloral is used in the manufacture of

A

DDT

82
Q
A

INDIABIX (5 decks)

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