Section 1

Question 1

Oxidation of SO2 to SO3 is favored by

Answer 1

low temperature and high pressure

Question 2

Gun powder, which is an explosive comprises of charcoal, sulphur, and

Answer 2

salt petre

Question 3

Starting raw material for the manufacture of alum is

Answer 3

Na2SO4

Question 4

Which of the following sugars is the sweetest?

Answer 4

Fructose

Question 5

Paper pulp produced by kraft /sulphate process is

Answer 5

strong fibrous

Question 6

Claude process if gas liquifaction employs

Answer 6

adiabatic expansion against piston

Question 7

The main use of hcl is in the

Answer 7

drilling of petroleum wells and pickling of steel sheets

Question 8

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

Answer 8

endothermic

Question 9

Viscose rayon is chemically known as

Answer 9

regenerated cellulose acetate

Question 10

All enzymes are made of

Answer 10

proteins

Question 11

The combustion reaction, C + O2 = CO2 is

Answer 11

exothermic

Question 12

Styrene is produced from ethyl benzene by the process of

Answer 12

dehydrogenation

Question 13

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

Answer 13

callagen

Question 14

the chamber process is

Answer 14

none of these

Question 15

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

Answer 15

15 - 20

Question 16

Fussel oil is a/an

Answer 16

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

Question 17

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

Answer 17

• poorer tensile strength
• poorer resistance to oxidaion
• greater amount of heat build - up under heavy loading

Question 18

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

Answer 18

ZnO (Zinc oxide)

Question 19

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

Answer 19

oleum

Question 20

Hemoglobin is a/an

Answer 20

protein

Question 21

Epoxy resin

Answer 21

is a good adhesive

Question 22

salt cake is chemically represented by

Answer 22

Na2SO4

Question 23

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

Answer 23

50

Question 24

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda

Answer 24

Pollution of water stream by mercury

Question 25

Esterification reaction produces

Answer 25

soap

Question 26

Wood charcoal is used for decoloration of sugar, because it ________ the coloured materials

Answer 26

adsorbs

Question 27

Producer gas consists mostly of

Answer 27

CO, CO2, N2, H2

Question 28

Neoprene is the trade name of

Answer 28

polychlororene

Question 29

Hard water

Answer 29

is not unfit for drinking purposes

Question 30

Which of the following is an organometallic compound

Answer 30

Tetra-ethyl-lead

Question 31

Sulfur addition in soap is done to

Answer 31

cure pimples & dundruff

Question 32

Phosphate rock is raw material for the manufacture of

Answer 32

- phosphoric acid - phosphorous - superphosphates Ans. All of the choices

Question 33

Mineral oils (eg. petroleum oils) are preferred over fatty acids (eg. mustard oil, ghee, tallow, palm oil, olive oil etc.) as lubricant due to its

Answer 33

- poor oxidation stability and high gum forming tendency - greater tendency of decomposition at elevated temperature - hydrolysis tendency in presence of water Ans. All of the choices

Question 34

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

Answer 34

Iron oxide

Question 35

Esterification reaction

Answer 35

- produces soap - is reversible - is a reaction between an alcohol and an organic acid Ans. All of the choices

Question 36

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

Answer 36

10 atm; 170 - 180 oC

Question 37

Zeolites remove both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolites are regenerated by flashing with the solution of

Answer 37

sodium chloride

Question 38

Pick out the endothermic reaction out of the following

Answer 38

CaCO3 = CaO + CO2

Question 39

Pasteurization of milk means

Answer 39

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

Question 40

Fusion of bauxite and _______ produces alumina cement.

Answer 40

limestone

Question 41

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

Answer 41

Solvay

Question 42

Polycaprolactum is commercially known as

Answer 42

nylon-6

Question 43

Frasch process is for

Answer 43

mining of sulphur

Question 44

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

Answer 44

Coagulation

Question 45

Pitch (a product of coal and tar distillation) is always mixed with creosite oil, when it is to be burnt in a burner, because

Answer 45

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

Question 46

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

Answer 46

CO

Question 47

The drug used in contraceptives is

Answer 47

mestranol

Question 48

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

Answer 48

white

Question 49

In the lurgi coal gasifier

Answer 49

large quantity of coal can be processed

Question 50

Neon gas is

Answer 50

used in color discharge tube