Question

Which of the following species is para-magnetic

• A. A carbonium ion
• B. A free radical
• C. A carbonium
• D. All of these

Answer 1

The correct option is B A free radical

$\text{Solution}:$

1. Paramagnetism is a form of magnetism whereby some materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field.

2. Free radicals are paramagnetic in nature due to the presence of unpaired electron in them.

$\text{Hence B is the correct option}$