MHT CET · Chemistry · Chemical Bonding and Molecular Structure

Select the incorrect statement about \(\mathrm{N}_2\) molecule.

A It is more stable than \(\mathrm{O}_2\) molecule.
B It consists more electrons in bonding molecular orbitals than \(\mathrm{O}_2\)
C Its bond order is 3
D It is dimagnetic

Verified Solution

Answer & Solution

Correct Answer

(B) It consists more electrons in bonding molecular orbitals than \(\mathrm{O}_2\)

Step-by-step Solution

Detailed explanation

\(\mathrm{N}_2\) bonding electrons: \(\sigma_{1s}^2 \sigma_{2s}^2 \pi_{2p}^4 \sigma_{2p_z}^2 \rightarrow N_b = 2+2+4+2 = 10\) \(\mathrm{O}_2\) bonding electrons: \(\sigma_{1s}^2 \sigma_{2s}^2 \sigma_{2p_z}^2 \pi_{2p}^4 \rightarrow N_b = 2+2+2+4 = 10\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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