Which of the following is a primary industry in chemical manufacturing?
a) Textile industry
b) Pharmaceutical industry
c) Petrochemical industry
d) Automotive industry
Answer: c) Petrochemical industry

Which raw material is primarily used in the manufacture of fertilizers?
a) Coal
b) Crude oil
c) Natural gas
d) Limestone
Answer: c) Natural gas

Which process is used for the industrial production of ammonia?
a) Haber process
b) Contact process
c) Ostwald process
d) Solvay process
Answer: a) Haber process

What is the main product of the Solvay process?
a) Ammonia
b) Sodium carbonate
c) Nitric acid
d) Sulfuric acid
Answer: b) Sodium carbonate

Which gas is commonly produced as a by-product in the petrochemical industry?
a) Oxygen
b) Methane
c) Carbon dioxide
d) Hydrogen
Answer: d) Hydrogen

The contact process is used for the production of:
a) Ammonia
b) Nitric acid
c) Sulfuric acid
d) Phosphoric acid
Answer: c) Sulfuric acid

Which catalyst is used in the Haber process?
a) Platinum
b) Iron
c) Copper
d) Nickel
Answer: b) Iron

In which industry is limestone primarily used as a raw material?
a) Textile
b) Cement
c) Pharmaceutical
d) Fertilizer
Answer: b) Cement

Which chemical is commonly used as a bleaching agent in the textile industry?
a) Sodium chloride
b) Sodium hydroxide
c) Calcium hypochlorite
d) Ammonium nitrate
Answer: c) Calcium hypochlorite

Which type of chemical reaction is most commonly used in the pharmaceutical industry to synthesize drugs?
a) Redox reactions
b) Hydrolysis
c) Polymerization
d) Esterification
Answer: d) Esterification