Question

The correct order of boiling point of $1,2,3$ alcohol is:

• A. $1>2>3$
• B. $2>3>1$
• C. $2>1>3$
• D. $3>2>1$

Answer 1

Answer: (A)

The presence of $-OH$ groups in a compound leads to Hydrogen-bonding which greatly increases its boiling. Generally, the more 'exposed' the $-OH$ group, the better it can participate in intermolecular H-bonding and thus, the boiling point will elevate. By that logic, primary alcohols will have the highest boiling point while tertiary alcohols will have the lowest boiling point.
$1°>2°>3°$
Hence, Option A is correct.