Q.

According to molecular orbital theory

Moderate

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C22− is expected to be diamagnetic

O22+ is expected to have a longer bond length than O2

N2+and N2−have the same bond order

He2+has the same energy as two isolated He atoms.

answer is A.

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Detailed Solution

(1) is true because all electrons are paired. (2) is false. Bond length of O22+< bond length of O2. (3) is true because both have same bond order (2.5). (4) is false.

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