36. Which petrochemical is used in the production of polyurethane foam?
a) Ethylene
b) Propylene
c) Toluene diisocyanate (TDI)
d) Benzene
Answer: c) Toluene diisocyanate (TDI)
37. Which chemical is commonly used as a desiccant to absorb moisture?
a) Silica gel
b) Activated charcoal
c) Calcium chloride
d) Zeolite
Answer: a) Silica gel
38. Which Indian state is known for its production of chemicals and petrochemicals in the eastern region?
a) West Bengal
b) Odisha
c) Jharkhand
d) Bihar
Answer: b) Odisha
39. Which chemical is commonly used as a bleaching agent in paper production?
a) Hydrogen peroxide
b) Sodium hypochlorite
c) Chlorine dioxide
d) Potassium permanganate
Answer: c) Chlorine dioxide
40. Which petrochemical is used in the production of ethylene glycol?
a) Ethylene
b) Propylene
c) Butadiene
d) Benzene
Answer: a) Ethylene
