The number of ions from the following that are expected to behave as oxidising agent is: $\mathrm{Sn}^{4+}, \mathrm{Sn}^{2+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{3+}, \mathrm{Pb}^{4+}, \mathrm{Tl}^{+}$

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · p-Block Elements

The number of ions from the following that are expected to behave as oxidising agent is:

Sn^{4 +}, Sn^{2 +}, Pb^{2 +}, Tl^{3 +}, Pb^{4 +}, Tl^{+}

(A)3
(B)4
(C)1
(D)2✓ Correct

Answer: (D)

Solution

Ions that revert to a more stable configuration one or two units lower in oxidation state act as oxidising agents. Because of the inert-pair effect,

Tl^{3 +}

(which is reduced to

Tl^{+}

) and

Pb^{4 +}

(reduced to

Pb^{2 +}

) behave as oxidising agents.

Sn^{4 +}

Sn^{2 +}

Pb^{2 +}

and

Tl^{+}

are the stable forms and are not oxidising in this sense. Count

= 2

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Single correct option

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