TS EAMCET · Chemistry · Coordination Compounds

According to Valence Bond Theory, the number of unpaired electrons present in ${[{MnCl}_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}$ and ${[Co (C_{2} O_{4})]}^{3 -},$ respectively, are

A $0; 5; 0$
B $4; 3; 2$
C $4; 1; 0$
D $5; 4; 3$

Verified Solution

Answer & Solution

Correct Answer

(C) $4; 1; 0$

Step-by-step Solution

Detailed explanation

In MnCl63- oxidation state of manganese is +3, Mn+3, electronic configuration is Ar3d44s0, due to the presence of weak field ligand Cl-pairing of electrons do not occur, so the number of unpaired electrons are 4. In FeCN63- oxidation state of Fe is +3, Fe+3 electronic…

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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Class Interval	Frequency
0 - 6	10
6 - 12	8
12 - 18	6
18 - 24	4
24 - 30	2

According to Valence Bond Theory, the number of unpaired electrons present in MnCl63-, Fe(CN)63- and CoC2O43-, respectively, are

Step-by-step Solution

According to Valence Bond Theory, the number of unpaired electrons present in ${[{MnCl}_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}$ and ${[Co (C_{2} O_{4})]}^{3 -},$ respectively, are