Hydrocarbons Question 323

Question: In paraffins, with the increasing molecular weight, it is found that [CPMT 1974]

Options:

A) Freezing point decreases

B) Boiling point decreases

C) Boiling point increases

D) Vapour pressure decreases

Show Answer

Answer:

Correct Answer: C

Solution:

Paraffins are non-polar compounds.

The intermolecular forces are weak Vander Waal’s forces.

As the molecular mass increases Vander Waal’s forces increases.

Hence boiling point increases.