81. Which chemical is commonly used as a solvent in nail polish remover?
a) Acetone
b) Ethanol
c) Isopropyl alcohol
d) Toluene
Answer: a) Acetone
82. Which petrochemical is used in the production of polyester?
a) Ethylene
b) Propylene
c) Ethylene glycol
d) Benzene
Answer: c) Ethylene glycol
83. Which chemical is commonly used as a flavor enhancer in food products?
a) Monosodium glutamate (MSG)
b) Sodium benzoate
c) Potassium chloride
d) Calcium propionate
Answer: a) Monosodium glutamate (MSG)
84. Which Indian state is known for its production of industrial chemicals in the western region?
a) Maharashtra
b) Gujarat
c) Rajasthan
d) Madhya Pradesh
Answer: b) Gujarat
85. Which chemical is commonly used as an antacid to neutralize stomach acid?
a) Sodium bicarbonate
b) Calcium carbonate
c) Magnesium hydroxide
d) Aluminum hydroxide
Answer: b) Calcium carbonate
