Question

Bromination of an alkane as compared to chlorination proceeds _____________.

• A. at a slower rate
• B. at a faster rate
• C. with equal rate
• D. with equal rate (or) different rate depending upon the temperature

Answer 1

The correct option is A at a slower rate

Bromination of an alkane occurs at a slower rate than chlorination of an alkane. As we know that halogenation involves the formation of a carbon-halogen bond. Now, the ease of halogenation will certainly depend on the carbon-halogen bond strength.

Bond formation energy of $C-Cl$ is higher than that of $C-Br$ bond. So, the ease of bromination is lower than the ease of chlorination.

So, the correct answer is option (A).