66. Which petrochemical is used in the production of synthetic rubber?
a) Ethylene
b) Propylene
c) Butadiene
d) Benzene
Answer: c) Butadiene
67. Which chemical is commonly used as a solvent in dry cleaning?
a) Tetrachloroethylene
b) Benzene
c) Ethanol
d) Xylene
Answer: a) Tetrachloroethylene
68. Which Indian state is known for its production of dyes and dyestuffs?
a) Rajasthan
b) Uttar Pradesh
c) Tamil Nadu
d) Punjab
Answer: c) Tamil Nadu
69. Which chemical is commonly used as a fire extinguishing agent?
a) Carbon dioxide
b) Water
c) Foam
d) Dry chemical powder
Answer: a) Carbon dioxide
70. Which petrochemical is used in the production of nylon?
a) Ethylene
b) Propylene
c) Caprolactam
d) Benzene
Answer: c) Caprolactam
