Chemical Process MCQs

Question 1

Washing of coal is done to

Accepted Answer

Both B and C

Answer

Remove the inherent impurities

Answer

Remove the adhering impurities

Answer

Reduce the ash content

Question 2

Wax is a

Accepted Answer

Mixture of esters of polyhydric alcohols excepting glycerine

Answer

Mixture of glycerides

Answer

Liquid at room temperature

Answer

Mixture of glycerides of fatty acids

Question 3

Molecular weight of plastics ranges from

Accepted Answer

20000 to 250000

Answer

5000 to 10000

Answer

500 to 5000

Answer

106 to 109

Question 4

Which is a high grade pulp?

Accepted Answer

Sulphate pulp

Answer

Rag pulp

Answer

Mechanical pulp

Answer

Sulphite pulp

Question 5

Higher vicosity index of a lubricating oil denotes

Accepted Answer

Less changes in fluidity of oil with temperature

Answer

Substantially high change in fluidity of oil with temperature

Answer

Its unsuitability under varying temperature conditions

Answer

None of these

Question 6

Acetone is produced by catalytic dehydrogenation of

Accepted Answer

Isopropanol

Answer

Phenol

Answer

Naphthalene

Answer

Ethyl benzene

Question 7

Highly porous refractory bricks are

Accepted Answer

None of these

Answer

Less susceptible to chemical attack by molten fluxes and gases etc

Answer

Very strong

Answer

Having very high thermal conductivity

Question 8

__________ is produced by the dehydrogenation of ethyl benzene.

Accepted Answer

Styrene

Answer

Ethyl alcohol

Answer

Cumene

Answer

Phenol

Question 9

Fluorescent dyes are added in detergents to

Accepted Answer

Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics

Answer

Attain distinctiveness from other brands

Answer

Act as tarnish inhibitor for metals like German silver

Answer

None of these