Alkane MCQs

41. Which of the following alkanes has the highest boiling point?

• A) Methane
• B) Butane
• C) Hexane
• D) Octane
• Answer: D

42. Which alkane is a major component of gasoline?

• A) Methane
• B) Hexane
• C) Pentane
• D) Octane
• Answer: D

43. Which of the following compounds is not an alkane?

• A) C₄H₁₀
• B) C₂H₆
• C) C₅H₁₀
• D) C₆H₁₄
• Answer: C

44. The reaction of alkanes with chlorine in the presence of sunlight is called:

• A) Hydrogenation
• B) Substitution
• C) Elimination
• D) Oxidation
• Answer: B

45. Which alkane is used as a refrigerant?

• A) Methane
• B) Ethane
• C) Propane
• D) Butane
• Answer: C

46. Which property decreases with an increase in the molecular mass of alkanes?

• A) Melting point
• B) Boiling point
• C) Density
• D) Solubility in water
• Answer: D

47. Which of the following is a property of alkanes?

• A) They are polar
• B) They are soluble in water
• C) They are non-polar
• D) They are highly reactive
• Answer: C

48. Alkanes are found in:

• A) Proteins
• B) Carbohydrates
• C) F

ats and oils

• D) Plastics
• Answer: C

49. Which of the following reactions is NOT characteristic of alkanes?

• A) Combustion
• B) Substitution
• C) Hydrogenation
• D) Addition
• Answer: D

50. Which of the following is true about alkanes?

• A) They are highly soluble in polar solvents
• B) They can form hydrogen bonds
• C) They are less dense than water
• D) They contain π-bonds
• Answer: C