CPI

Question 1

Oxidation of SO2
to SO3 is favored 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.

Answer 1

B. low temperature and high pressure.

Question 2

Gun powder, an explosive, comprises of
charcoal, sulfur and .
A. glycerin
B. saltpeter
C. nitroglycerin
D. dynamit

Answer 2

B. saltpeter

Question 3

The starting raw material for the manufacture
of alum is .
A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate

Answer 3

C. bauxite

Question 4

Paper pulp produced by kraft/sulfate process
is .
A. bleached easily
B. dull white in color
C. strong & fibrous
D. dark colored

Answer 4

C. strong & fibrous

Question 5

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

Answer 5

D. adiabatic expansion against a piston or in a turbine.

Question 6

Viscose rayon is chemically .
A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate

Answer 6

D. regenerated cellulose acetate

Question 7

Styrene is produced from ethyl benzene by
the process of .
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration

Answer 7

A. dehydrogenation

Question 8

Gelatin which is a nitrogenous organic protein
is obtained by the hydrolysis of .
A. tannin
B. molasses
C. chitin
D. collagen

Answer 8

D. collagen

Question 9

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

Answer 9

B. 15 - 20

Question 10

Fusel oil is a/an
A. essential oil.
B. extract from medicinal herbs.
C.mixture of higher molecular weight alcohols (a byproduct obtained during production of alcohol from
molasses).
D. none of these.

Answer 10

C.mixture of higher molecular weight alcohols (a byproduct obtained during production of alcohol from
molasses).

Question 11

Styrene-butadiene-rubber (SBR) as
compared to natural rubber has .
A. poorer tensile strength.
B. poorer resistance to oxidation.
C.greater amount of heat build-up under
heavy loading.
D. all (a), (b) and (c)

Answer 11

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

Question 12

Coefficient of thermal expansion of glass is
decreased by the addition of during its
manufacture.
A. CaO
B. MnO2
C. ZnO
D. FeS

Answer 12

C. ZnO

Question 13

The catalyst used in the manufacture of DDT (from
chloral and chlorobenzene) is
A. dilute H2SO4
B. oleum
C. ultraviolet light
D. none of these

Answer 13

oleum

Question 14

Epoxy resin
A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.

Answer 14

A. is a good adhesive.

Question 15

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A. High cost of mercury.
B. High specific gravity of mercury.
C. Non-availability of high purity mercury.
D. Pollution of water stream by mercury.

Answer 15

D. Pollution of water stream by mercury.

Question 16

Esterification reaction produces
A. aerosol
B. trans fat
C. soap
D. mercaptans

Answer 16

C. soap

Question 17

Wood charcoal is used for decoloration of sugar
because it the colored materials.
A. adsorbs
B. oxidizes
C. reduces
D. converts

Answer 17

A. adsorbs

Question 18

Producer gas consists mainly of
A. CO, CO2, N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H

Answer 18

A. CO, CO2, N2, H2

Question 19

Neoprene is the trade name of
A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber

Answer 19

C. polychloroprene

Question 20

Sulfur addition in soap is done to
A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.

Answer 20

B. cure pimples & dandruff.

Question 21

Phosphate rock is a raw material for the
manufacture of
A. phosphoric acid
B. phosphorous
C. superphosphates
D. all of the above

Answer 21

D. all of the above

Question 22

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.
B. greater tendency of decomposition at elevated temperature.
C. hydrolysis tendency in presence of water.
D. all of the above

Answer 22

B. greater tendency of decomposition at elevated temperature

Question 23

Which of the following is NOT a raw material used
for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica

Answer 23

A. Iron oxide

Question 24

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. calcium sulphate
B. sodium chloride
C. sodium sulphate
D. magnesium chloride

Answer 24

B. sodium chloride

Question 25

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

Answer 25

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

Question 26

Fusion of bauxite and produces high alumina cement. A. alum B. limestone C. coke D. quartz

Answer 26

B. limestone

Question 27

process is used for the manufacture of sodium carbonate by ammonia soda process. A. Ostwald’s B. Bosch C. Solvay D. Haber's

Answer 27

C. Solvay

Question 28

Polycaprolactum is commercially known as A. nylon-6 B. nylon-66 C. dacron D. rayon

Answer 28

A. nylon-6

Question 29

Frasch process is for A. making oxygen B. producing helium C. mining sulfur D. making nitrogen

Answer 29

C. mining sulfur

Question 30

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because A. its calorific value is very less. B. tar neutralizes the residual acids present in pitch. C.it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop. D. all of the above

Answer 30

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

Question 31

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

Answer 31

B. CO

Question 32

The drug used in contraceptives is A. sulphadizene B. mestranol C. methyl salicylate D. cholecalcifero

Answer 32

B. mestranol

Question 33

Raw materials used for producing _ _ cement does not contain iron oxide. A. waterproof B. slag C. white D. pozzolan

Answer 33

C. white

Question 34

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

Answer 34

D. large quantity of coal can be processed

Question 35

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

Answer 35

B. used in color discharge tube.