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The bond order of a molecule in the exci...

The bond order of a molecule in the excited state can be

A

positive

B

negative

C

zero

D

both (2) and (3)

Text Solution

Verified by Experts

The correct Answer is:
B
In the excited state, electrons are promoted to higher energy levels. Thus, `N_agtN_b` and bond order `(N_b-N_a)//2` becomes negative. It implies that the molecule is unstable.
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Assertion(A) - The bond order in a molecule can have any value, positive or negative, integral or fractional or zero. Reason(R) - The bond order of a molecule depends upon the number of electrons in the bonding and antibonding molecular orbitals.