Which compound is produced from the fermentation of sugars?
a) Ethanol
b) Methanol
c) Acetic acid
d) Propylene
Answer: a) Ethanol

Which of the following is a common application of phosphoric acid?
a) Food additive
b) Fuel additive
c) Pesticide
d) Detergent
Answer: a) Food additive

Which chemical is used as a water softener in detergents?
a) Sodium chloride
b) Sodium carbonate
c) Calcium chloride
d) Potassium nitrate
Answer: b) Sodium carbonate

Which of the following is a monomer for producing polyethylene?
a) Ethylene
b) Propylene
c) Butadiene
d) Styrene
Answer: a) Ethylene

Which industry uses large amounts of hydrogen gas?
a) Fertilizer
b) Cement
c) Textile
d) Petrochemical
Answer: d) Petrochemical

Which chemical is used in the process of saponification to produce soap?
a) Sodium chloride
b) Sodium hydroxide
c) Calcium carbonate
d) Potassium nitrate
Answer: b) Sodium hydroxide

Which compound is used as a flame retardant in the chemical industry?
a) Ammonium chloride
b) Calcium sulfate
c) Phosphorus compounds
d) Potassium nitrate
Answer: c) Phosphorus compounds

Which of the following is a by-product of the steel industry?
a) Coke
b) Ammonia
c) Calcium sulfate
d) Ethylene
Answer: a) Coke

Which process is used to separate crude oil into different fractions?
a) Distillation
b) Hydrogenation
c) Cracking
d) Polymerization
Answer: a) Distillation

Which of the following is used as a raw material in the production of aluminum?
a) Bauxite
b) Iron ore
c) Copper ore
d) Limestone
Answer: a) Bauxite