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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/ 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
Producer gas consists mainly of
CO, CO2 N2, H2
26
Neoprene is the trade name of
polychloroprene
27
Hard water does not affect the lather formation by soap. is not unfit for drinking purpose. pollutes the water stream.
is not unfit for drinking purpose.
28
Which of the following is an organo-metal-lic compound ? Isopropyl alcohol Tetra-ethyl lead Zeolite Cumene
Tetra-ethyl lead
29
Sulphur addition in soap is done to
cure pimples & dandruff.
30
Phosphate rock is a raw material for the manufacture of phosphoric acid phosphorous superphosphates
all of these
31
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 of these
32
Which of the following is not a raw material used for the manufacture of ordinary glass? Iron oxide Soda ash Limestone Silica
Iron oxide
33
Esterification reaction produces soap. is reversible. is a reaction between an alcohol and an organic acid.
All of these
34
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 170-180°C
35
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
sodium chloride
36
Pick out the endothermic reaction out of the following.
CaCO3 = CaO + CO2
37
Pasteurisation of milk means
killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
38
Fusion of bauxite and __________ produces high alumina cement.
limestone
39
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Solvay
40
Polycaprolactum is commercially known as
nylon-6
41
Frasch process is for
mining sulphur
42
Very fine suspended and colloidal impurities are removed from water by a process called
coagulation
43
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
44
Which is the main reducing agent during production of iron from iron ore in a blast furnace ? C CO CO2 H2
CO
45
The drug used in contraceptives is
mestranol
46
aw materials used for producing __________ cement does not contain iron oxide.
white
47
In the Lurgi coal gasifier
large quantity of coal can be processed.
48
Neon gas is
used in color discharge tube.
49
Calgon used in water treatment is chemically
sodium hexametaphosphate
50
Which oil is preferred for paint manufacture ?
Drying oil
51
Styrene butadiene rubber (SBR) is
a synthetic polymer.
52
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm & 275°C
53
Glycerine is not used in the manufacture of explosive. conditioning and humidification of tobacco. manufacture of pharmaceuticals. none of these
none of these
54
Cumene is the starting material for the production of
phenol and acetone
55
The type of high refractive index glass used in optical instruments is __________ glass.
flint
56
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale. nickel vanadium alumina iron
vanadium
57
Most commonly used rubber vulcanising agent is
sulphur
58
Terylene is same as dacron a polyester both (a) & (b)
both (a) & (b)
59
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
60
Dehydrogenation of isopropanol produces
Acetone
61
Pick out the wrong statement.
Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
62
Concentration of hydrogen peroxide is done by
vacuum crystallisation
63
Helium is produced on commercial scale from
natural gas
64
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
65
The catalyst used in the manufacture of DDT is
20% oleum.
66
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
67
__________ is used as a catalyst in fat splitting.
ZnO
68
Which of the following is not produced on commercial scale from sea water?
Sodium sulphate.
69
Heating of __________ to 120°C, produces plaster of paris.
Gypsum
70
Pick out the wrong statement.
Decomposition of sulphuric acid on heating does not start before its boiling.
71
Which of the following has sodium bicarbonate as its main constituent ?
Baking powder
72
Ordinary glass is not a/an
material with sharp definite melting point.
73
In premitive days, __________ was being manufactured by Leblanc Process.
soda ash
74
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa).
75
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
76
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting.
77
Paper grade bamboo contains about __________ percent cellulose.
5
78
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
79
Vulcanisation of rubber
converts its plasticity into elasticity.
80
Raw materials for 'Solvay Process' for manufacture of the soda ash are
salt, limestone and coke or gas.
81
Chloral is used in the manufacture of
DDT
82

INDIABIX (5 decks)

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