Chemical Process MCQs

Question 1

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

Accepted Answer

20 - 30

Answer

< - 5

Answer

100 - 150

Answer

250 - 300

Question 2

The end bleaching agent used to move last traces of colour bodies from the pulp is

Accepted Answer

Chlorine dioxide (ClO2)

Answer

MgO

Answer

SO2 gas

Answer

Mercaptans

Question 3

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

Accepted Answer

All of the above

Answer

Poorer tensile strength

Answer

Poorer resistance to oxidation

Answer

Greater amount of heat build-up under heavy loading

Question 4

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

Accepted Answer

Depithing

Answer

Digestion

Answer

Bleaching

Answer

None of these

Question 5

Black liquor is converted into white liquor by

Accepted Answer

Evaporation and burning the concentrate followed by causticisation of products

Answer

Multi-effect evaporation only

Answer

Selective liquid extraction

Answer

Extractive distillation

Question 6

Glycerine is a by-product of the __________ industry.

Accepted Answer

Soap

Answer

Detergent

Answer

Oil hydrogenation

Answer

Paint

Question 7

Sudden temperature fluctuation does not affect pyrex glass, because of its

Accepted Answer

Low co-efficient of expansion

Answer

High co-efficient of expansion

Answer

High melting point

Answer

Both B and C

Question 8

Starting material for the production of butadiene in India is

Accepted Answer

Ethyl alcohol

Answer

Naphthalene

Answer

Benzol

Answer

Phthalic anhydride

Question 9

Commercial production of calcium carbide requires limestone and __________ as raw materials.

Accepted Answer

Sand

Answer

Coke

Answer

Soda ash

Answer

Fuel oil