Chemical Process MCQs

Question 1

Fumigant insecticides

Accepted Answer

Emit poisonous vapour

Answer

Kill insects, when they eat it

Answer

Are absorbed throughout the plant

Answer

None of these

Question 2

Fusel oil is a/an

Accepted Answer

Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses)

Answer

Essential oil

Answer

Extract from medicinal herbs

Answer

None of these

Question 3

Which of the following is a constituent of coffee?

Accepted Answer

Caffeine

Answer

Nicotine

Answer

Calgon

Answer

Lignin

Question 4

Which of the following is an endothermic reaction?

Accepted Answer

Both B and C

Answer

Absorption of SO3 in 98% H2SO4

Answer

C + H2O = CO + H2

Answer

Thermal dissociation of iron pyrites

Question 5

Salt is added in the kettle during soap manufacture to separate

Accepted Answer

Soap from lye

Answer

Glycerine from lye

Answer

The metallic soap

Answer

The unsaponified fat from soap

Question 6

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

Accepted Answer

Both A and B

Answer

Flocculate the impurities

Answer

Facilitate fast filtration

Answer

Neither A nor B

Question 7

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

Accepted Answer

Avoid corrosion

Answer

Increase the rate of absorption

Answer

Reduce the cooling water circulation rate

Answer

None of these

Question 8

Glass is

Accepted Answer

A super cooled liquid

Answer

Mainly CaO

Answer

Subjected to galvanising

Answer

All of the above

Question 9

Glauber's salt is chemically

Accepted Answer

None of these

Answer

Calcium sulphate

Answer

Potassium sulphate

Answer

Potassium chlorate