CHEMICAL PROCESS QUIZ

Coke used for the production of calcium carbide should have

All of these

Low ash content

High electrical resistivity

Low ignition temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Starting material for the commercial production of ethyl alcohol in India is

Maize

Rice

Fruit of Mahua tree

Molasses

TRUE ANSWER : ?
YOUR ANSWER : ?

The most widely used coagulant for removing suspended impurities from water is

Bleaching powder

Chlorine

Alum

Calcium sulphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Transparent soaps (e.g. Pears) are

Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency

Metallic soaps with frothing agent from which glycerine has not been recovered

Metallic soaps with frothing agent and free stearic acid to achieve transparency

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Plasticisers are added to paints to

Increase atmospheric oxidation

Make glossy surface

Give elasticity & prevent cracking of the film

Make it corrosion resistant

TRUE ANSWER : ?
YOUR ANSWER : ?

Celluloid is chemically

Cellulose acetate

Cellulose acetate butyrate

Regenerated cellulose

Cellulose nitrate

TRUE ANSWER : ?
YOUR ANSWER : ?

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

> 30

< 10

75

50

TRUE ANSWER : ?
YOUR ANSWER : ?

The most commonly used substance to speed up the sedimentation of sewage is

Sodium bisulphite

Sulphuric acid

Lime

Chlorine

TRUE ANSWER : ?
YOUR ANSWER : ?

A bio-catalyst produced by living cells which acts independent of the cell is called a/an

Nutrient

Substrate

Enzyme

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Resistance to fusion of the refractory under a steady rising temperature condition is called

Spalling

Both A & B

Refractoriness

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?