Which raw material is essential for the production of steel?
a) Limestone
b) Iron ore
c) Bauxite
d) Copper
Answer: b) Iron ore

Which chemical is used to produce detergents?
a) Sulfuric acid
b) Sodium carbonate
c) Phosphoric acid
d) Ammonium nitrate
Answer: c) Phosphoric acid

Which of the following is a synthetic polymer?
a) Cellulose
b) Nylon
c) Silk
d) Rubber
Answer: b) Nylon

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

Which of the following is used as a catalyst in the production of polyethylene?
a) Platinum
b) Nickel
c) Titanium chloride
d) Palladium
Answer: c) Titanium chloride

Which gas is commonly used in the chemical industry for inert atmospheres?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Methane
Answer: b) Nitrogen

Which compound is produced by the electrolysis of brine?
a) Sodium carbonate
b) Sodium hydroxide
c) Calcium chloride
d) Potassium nitrate
Answer: b) Sodium hydroxide

Which of the following is a biodegradable polymer?
a) Polyethylene
b) Polylactic acid (PLA)
c) Polyvinyl chloride (PVC)
d) Nylon
Answer: b) Polylactic acid (PLA)

Which of the following is used in the vulcanization of rubber?
a) Sulfur
b) Phosphorus
c) Chlorine
d) Bromine
Answer: a) Sulfur

Which chemical is commonly used in the production of fertilizers?
a) Sodium chloride
b) Ammonium nitrate
c) Calcium sulfate
d) Potassium hydroxide
Answer: b) Ammonium nitrate