Question

Melting point of alkanes increases with ___ in the molecule.

• A. increase in no of carbon atoms
• B. decrease in no of carbon atoms
• C. increase in molecular mass of alkanes
• D. decrease in molecular mass of alkanes

Answer 1

Answer: (A), (C)

The correct options are
A

increase in no of carbon atoms

C

increase in molecular mass of alkanes

The melting point of hydrocarbons increases as the the number of carbon atoms increases in the molecule. This is because of forces between molecule increase as the size increases.

Molecular mass of hydrocarbon increases when the number of carbon atoms increase.So A and C are correct.