Which of the following hydrocarbons is used as an anti-knock agent in gasoline?**
a) Methane
b) Ethylene
c) Benzene
d) Toluene
Answer: d) Toluene

The presence of which type of bond in hydrocarbons contributes to their unsaturation?
a) Single bond
b) Double bond
c) Triple bond
d) Quadruple bond
Answer: b) Double bond

Which of the following is the smallest alkane?
a) Methane
b) Ethane
c) Propane
d) Butane
Answer: a) Methane

Which hydrocarbon is commonly used as a fuel in lighters?
a) Ethane
b) Propane
c) Butane
d) Methane
Answer: c) Butane

Which of the following is a property of aromatic hydrocarbons?
a) They are highly soluble in water
b) They have a characteristic odor
c) They are non-flammable
d) They contain carbonyl groups
Answer: b) They have a characteristic odor

The process of removing hydrogen from a hydrocarbon is known as:
a) Hydrogenation
b) Dehydrogenation
c) Cracking
d) Halogenation
Answer: b) Dehydrogenation

Which of the following hydrocarbons is used as a starting material in the synthesis of detergents?
a) Methane
b) Propylene
c) Benzene
d) Ethylene
Answer: b) Propylene

The name of the compound with the formula C₅H₁₂ is:
a) Pentene
b) Pentane
c) Pentadiene
d) Pentyne
Answer: b) Pentane

Which of the following hydrocarbons is used as a precursor for the manufacture of synthetic fibers?
a) Ethylene
b) Propylene
c) Styrene
d) Benzene
Answer: c) Styrene