TS EAMCET · Chemistry · d and f Block Elements

Choose the correct statement from the following with reference to inert pair effect

A \(\mathrm{Sn}^{+4}\) is reducing agent but \(\mathrm{Pb}^{+4}\) is an oxidizing agent
B \(\mathrm{Sn}^{+4}\) is an oxidizing agent but \(\mathrm{Pb}^{+2}\) is a reducing agent
C \(\mathrm{Sn}^{+2}\) is reducing agent but \(\mathrm{Pb}^{+4}\) is an oxidizing agent
D \(\mathrm{Sn}^{+2}\) is an oxidizing agent but \(\mathrm{Pb}^{+4}\) is a reducing agent

Verified Solution

Answer & Solution

Correct Answer

(C) \(\mathrm{Sn}^{+2}\) is reducing agent but \(\mathrm{Pb}^{+4}\) is an oxidizing agent

Step-by-step Solution

Detailed explanation

The inert pair effect results in the stabilization of an oxidation state, two units less than the common group oxidation state. The stability of the oxidation state, two units less than the group oxidation state increases down the group. Thus, \(\mathrm{Pb}^{2+}\) is much more…

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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