Which chemical is used to neutralize acidic wastewater?
a) Sodium chloride
b) Sodium hydroxide
c) Calcium carbonate
d) Ammonium nitrate
Answer: b) Sodium hydroxide

Which of the following is a property of a polymer?
a) High melting point
b) Low molecular weight
c) High molecular weight
d) Brittle
Answer: c) High molecular weight

Which compound is used in the production of polyester?
a) Ethylene glycol
b) Methanol
c) Butadiene
d) Propylene
Answer: a) Ethylene glycol

Which industry uses carbon black as a reinforcing agent?
a) Textile
b) Pharmaceutical
c) Rubber
d) Cement
Answer: c) Rubber

Which gas is used in the manufacture of fertilizers?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Methane
Answer: b) Nitrogen

Which of the following is a renewable source of energy?
a) Coal
b) Crude oil
c) Natural gas
d) Biomass
Answer: d) Biomass

Which chemical is commonly used in the manufacture of glass?
a) Sodium chloride
b) Calcium carbonate
c) Silica
d) Ammonium nitrate
Answer: c) Silica

Which of the following is used as a plasticizer in the chemical industry?
a) Phthalates
b) Ethanol
c) Methanol
d) Acetic acid
Answer: a) Phthalates

Which compound is used as a precursor in the production of synthetic fibers?
a) Ethylene
b) Acetylene
c) Vinyl chloride
d) Propylene
Answer: d) Propylene

Which chemical is used as a degreasing agent in industrial cleaning?
a) Sodium chloride
b) Sodium hydroxide
c) Trichloroethylene
d) Potassium nitrate
Answer: c) Trichloroethylene

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

Which process is used to convert vegetable oils into margarine?
a) Hydrogenation
b) Dehydration
c) Esterification
d) Oxidation
Answer: a) Hydrogenation

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

Which industry heavily uses chlorine gas in its processes?
a) Textile
b) Paper and pulp
c) Pharmaceutical
d) Cement
Answer: b) Paper and pulp