નીચેના પૈકી ક્યુ શૂન્ય સ્ફટિક ક્ષેત્ર સ્થાયીકરણ ઊર્જા \((CFSE)\) દર્શાવે છે ?

A \([Mn(H_2O)_6]^{3+}\)
B \([Fe(H_2O)_6]^{3+}\)
C \([Co(H_2O)_6]^{2+}\)
D \([Co(H_2O)_6]^{3+}\)

Verified Solution

Answer & Solution

Correct Answer

(B) \([Fe(H_2O)_6]^{3+}\)

Step-by-step Solution

Detailed explanation

\(\mathrm{H}_{2} \mathrm{O}\) is a weak field ligand, hence \(\Delta_{o}<\) pairing energy.

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.

Same subject

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From NEET

સ્તંભ \(A\) માં ઓકસાઈડ આપેલા છે સાથે સ્તંભ \(B\) માં તેના ગુણધર્મો આપેલા છે

સ્તંભ \(A\)	સ્તંભ \(B\)
\((i) \;\mathrm{Na}_{2} \mathrm{O}\)	\((a)\) તટસ્થ
\((ii) \;\mathrm{Al}_{2} \mathrm{O}_{3}\)	\((b)\) બેઝિક
\((iii)\;\mathrm{N}_{2} \mathrm{O}\)	\((c)\) એસિડિક
\((iv)\;\mathrm{Cl}_{2} \mathrm{O}_{7}\)	\((d)\) ઉભયગુણી

NEET 2019 Medium

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