Chemical Process MCQs

Question 1

Bleaching action of bleaching powder is due to its __________ properties.

Accepted Answer

Oxidising

Answer

Reducing

Answer

Disinfecting

Answer

None of these

Question 2

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

Accepted Answer

Cyclo trimethylene trinitramine

Answer

Trinitro resorcinol

Answer

Cyclo tetramethylene tetranitramine

Answer

Trinitro benzene

Question 3

Dechlorination of treated water is necessary to

Accepted Answer

Remove chlorinous taste

Answer

Remove residual turbidity

Answer

Reduce the bacterial load on filter

Answer

Control taste and odour

Question 4

Deaeration of water in its treatment is necessary, as it

Accepted Answer

Minimises its corrosiveness

Answer

Minimises its turbidity

Answer

Helps in controlling its taste and odour

Answer

None of these

Question 5

Phenol formaldehyde resin is used as an adhesive in making

Accepted Answer

Laminates

Answer

Card boxes

Answer

Furniture

Answer

Books

Question 6

Solvent used for extraction of oil is

Accepted Answer

Hexane

Answer

Methyl ethyl ketone

Answer

Furfurol

Answer

None of these

Question 7

Soap cannot be used with hard water, because

Accepted Answer

They form insoluble calcium soaps which precipitate

Answer

Hard water contains sulphate

Answer

They attract back the removed dirt

Answer

None of these

Question 8

Which glass is usually used in optical work?

Accepted Answer

Photo-sensitive glass

Answer

Lead glass

Answer

High silica (borosilicate) glass

Answer

Fibre glass

Question 9

The purpose of adding Na2CO3 to water of low alkalinity is to

Accepted Answer

Permit the use of alum as a coagulant

Answer

Increase the softening capacity of zeolite

Answer

Facilitate easy regeneration of zeolite

Answer

All of the above