Chemistry · Electrochemistry

JEE Main 2025 — 29 January, Morning Shift — Question 2

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

Option A:
$\mathrm{E}_{\mathrm{Sn}^{+}}^{\ominus} / \mathrm{sn}^{n^{++}}{ }^{+}=+1.15 \mathrm{~V}$
Option B:
$\mathrm{E}_{\mathrm{Tl}^{3} / \mathrm{Tl}}^{\ominus}=+1.26 \mathrm{~V}$
Option C:
$\mathrm{E}_{\mathrm{Al}^{3} / \mathrm{Al}}^{\ominus}=-1.66 \mathrm{~V}$
Option D:
$\mathrm{E}_{\mathrm{P} b^{+}}^{\ominus} / \mathrm{Pb}^{++}{ }^{+}=+1.67 \mathrm{~V}$
Correct

Answer: D

Standard reduction potential value ( +ve ) increases oxidising capacity increases.

Answer key and solution verified before publishing.

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