Question

Assertion :The C-O bond in $C{O}^{+}$ is longer than in CO. Reason: In changing from $CO$ to $C{O}^{+}$, the electron is removed from nonbonding molecular orbital having anti bonding character.

• A. The Assertion is true, Reason is true and Reason is the correct explanation for Assertion
• B. The Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
• C. The Assertion is true, Reason is false.
• D. The Assertion is false, Reason is true.

Answer 1

The correct option is D The Assertion is false, Reason is true.

In changing from $CO$ to $C{O}^{+}$, the electron is removed from non-bonding molecular orbital having an antibonding character. In this case, the bond length decreases.

Since the bond length is inversely proportional to bond order, so the bond order increases.

$\therefore$ The $C-O$ bond in $C{O}^{+}$ is smaller than in $CO$.

Hence, option $D$ is correct.