Question

An odd electron molecule among the following is

• A. CO
• B. SO$_2$
• C. CO$_2$
• D. NO
• E. OF$_2$

Hint:

Odd number of electrons → paramagnetic molecule.

Answer 1

The Correct Option is D

Concept: An odd electron molecule contains an odd total number of electrons and is usually paramagnetic.

Step 1: Count total electrons in each molecule.
• CO: \(6 + 8 = 14\) (even)
• SO$_2$: \(16 + 2\times8 = 32\) (even)
• CO$_2$: \(6 + 2\times8 = 22\) (even)
• NO: \(7 + 8 = 15\) (odd)
• OF$_2$: \(8 + 2\times9 = 26\) (even)

Step 2: Identify odd electron molecule. Only NO has an odd number of electrons.

Step 3: Conclusion. \[ \boxed{\text{NO}} \]