Which of the following hydrocarbons has a sweet odor and is used as a solvent in dry cleaning?
a) Methane
b) Toluene
c) Ethylene
d) Benzene
Answer: d) Benzene

Which type of hydrocarbon contains one or more double bonds?
a) Alkane
b) Alkene
c) Alkyne
d) Aromatic hydrocarbon
Answer: b) Alkene

Which of the following is used in the production of synthetic rubber and plastics?
a) Ethylene
b) Propylene
c) Styrene
d) All of the above
Answer: d) All of the above

Which of the following hydrocarbons is used as a refrigerant in cooling systems?
a) Methane
b) Ethylene
c) Freon
d) Propylene
Answer: c) Freon

The process of adding hydrogen to an alkene to convert it to an alkane is called:
a) Hydrogenation
b) Dehydration
c) Halogenation
d) Cracking
Answer: a) Hydrogenation

Which of the following is the smallest alkyne?
a) Ethylene
b) Propylene
c) Ethyne
d) Butyne
Answer: c) Ethyne

Which of the following hydrocarbons is used in the production of detergents and surfactants?
a) Benzene
b) Propylene
c) Ethylene
d) Methane
Answer: b) Propylene

Which of the following is a property of aromatic hydrocarbons?
a) They are saturated hydrocarbons
b) They contain a benzene ring
c) They have the general formula CₙH₂ₙ
d) They are less reactive than alkenes
Answer: b) They contain a benzene ring

Which of the following hydrocarbons is used in the production of antifreeze?
a) Ethylene glycol
b) Methanol
c) Benzene
d) Propylene
Answer: a) Ethylene glycol

Which of the following hydrocarbons is used as a solvent in paint thinners?
a) Ethylene
b) Propylene
c) Toluene
d) Methane
Answer: c) Toluene

Which type of hydrocarbon has the general formula CₙH₂ₙ?
a) Alkane
b) Alkene
c) Alkyne
d) Aromatic hydrocarbon
Answer: b) Alkene

Which of the following is a characteristic of alkanes?
a) They are unsaturated hydrocarbons
b) They have the general formula CₙH₂ₙ
c) They are less reactive than alkenes
d) They contain one or more double bonds
Answer: c) They are less reactive than alkenes