Question

Assertion (A): Among isomeric pentanes, 2, 2-dimethylpentane has highest boiling point.

Reason (R): Branching does not affect the boiling point.

Options

• Both A and R are correct and R is the correct explanation of A.

• Both A and R are correct but R is not the correct explanation of A.

• Both A and R are not correct.

• A is not correct but R is correct.

Answer 1

Both A and R are not correct.

Explanation:

The boiling decreases with branching due to the decrease in surface area, which leads to a decrease in van der Waals force.