Q38 · CSIR-NET Chemistry, December 2011

Paper: CSIR-NET December 2011 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Hydrogen Bonding Weak Interactions · Marks: 2 · Difficulty: Medium

The number of anti-bonding electrons in NO and CO according to MO theory are respectively.

(a)1,0

(b)2,2

(c)3,2

(d)2,3

Answer

Answer: C ✓ checked by 4AB · confidence medium

The source book printed A; on checking, C is correct — see the explanation.

Explanation

Counting all antibonding MOs: CO has σ*(2s)² = 2 antibonding electrons; NO has σ*(2s)² plus one in π* = 3. Hence 3 and 2.

Study loop for Chemical Bonding

1. Practise the PYQsPrevious-year questions, with answers

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