COMEDK · Chemistry · 4. Chemical Bonding and Molecular Structure

Pick up the incorrect statement.

A Dipole moment of ammonia is due to orbital dipole and resultant dipole in the same direction.
B In \(\mathrm{BF}_{3}\) bond dipoles are higher but dipole moment is zero.
C Dipole moment is a vector quantity.
D \(\mathrm{O}_{2}\) and \(\mathrm{H}_{2}\) show bond dipole due to polarisation.

Verified Solution

Answer & Solution

Correct Answer

(D) \(\mathrm{O}_{2}\) and \(\mathrm{H}_{2}\) show bond dipole due to polarisation.

Step-by-step Solution

Detailed explanation

\(\mathrm{O}_{2}\) and \(\mathrm{H}_{2}\) do not show bond dipole as they are homoatomic molecules, hence, they are non-polar.

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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