Chemical Process MCQs

Question 1

The major constituent of black liquor generated during paper manufacture is sodium

Accepted Answer

Carbonate

Answer

Sulphate

Answer

Hydroxide

Answer

Bi-carbonate

Question 2

Boiling of water containing temporary hardness produces

Accepted Answer

CO2

Answer

CaSO4

Answer

CaHCO3

Answer

None of these

Question 3

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?

Accepted Answer

Calcium & aluminium stearate

Answer

Xanthates

Answer

Stearic acid

Answer

Formic acid

Question 4

Pick out the wrong statement.

Accepted Answer

Presence of sodium sulphate in pulp makes the pulp bleachability poor

Answer

Fibrillation of fibre during paper manufacture is done to develop the strength in paper

Answer

Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number

Answer

Bagasse fibre contains both lignin & cellulose

Question 5

Nicotine is

Accepted Answer

Both A and B

Answer

A volatile alkaloid

Answer

Obtained by treating by-products of the tobacco processing industry

Answer

Neither A nor B

Question 6

The purpose of tanning in leather industry is to

Accepted Answer

Stiffen the leather

Answer

Smoothen the leather

Answer

Make it flexible

Answer

Impart water resistance

Question 7

What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?

Accepted Answer

Cl2, H2 & NaOH solution

Answer

Cl2 & Na

Answer

Cl2 & H2

Answer

O2 & H2

Question 8

Pick out the wrong statement.

Accepted Answer

Benzene hexachloride is not a contact insecticide

Answer

DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction

Answer

Chloral is obtained by the chlorination of ethyl alcohol

Answer

Insecticides acting on the insects through the respiratory system are called fumigants

Question 9

Nylon-6 is a

Accepted Answer

Polyamide

Answer

Thermosetting resin

Answer

Polyester

Answer

None of these