Which industry heavily relies on the use of nitrogen fertilizers?
a) Textile
b) Agriculture
c) Pharmaceutical
d) Petrochemical
Answer: b) Agriculture

What is the primary use of sodium carbonate in the chemical industry?
a) As a food preservative
b) In the manufacture of glass
c) As a catalyst
d) In the production of plastics
Answer: b) In the manufacture of glass

Which chemical is used to soften hard water in industrial processes?
a) Sodium chloride
b) Sodium carbonate
c) Calcium carbonate
d) Potassium chloride
Answer: b) Sodium carbonate

Which process is used to convert vegetable oils into margarine?
a) Hydrogenation
b) Dehydration
c) Esterification
d) Oxidation
Answer: a) Hydrogenation

Which industry is the largest consumer of chlorine gas?
a) Textile
b) Paper and pulp
c) Pharmaceutical
d) Cement
Answer: b) Paper and pulp

Which chemical is used as a desiccant to absorb moisture in industrial processes?
a) Sodium chloride
b) Calcium chloride
c) Sodium carbonate
d) Potassium nitrate
Answer: b) Calcium chloride

Which of the following is a natural polymer?
a) Polyethylene
b) Rubber
c) Nylon
d) Polyester
Answer: b) Rubber

Which chemical is used in the production of PVC (polyvinyl chloride)?
a) Ethylene
b) Acetylene
c) Vinyl chloride
d) Propylene
Answer: c) Vinyl chloride

Which industry produces the most wastewater pollutants?
a) Textile
b) Pharmaceutical
c) Cement
d) Petrochemical
Answer: a) Textile

Which gas is released during the production of cement?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Methane
Answer: b) Carbon dioxide