Chemistry · d and f Block Elements

JEE Main 2025 — 28 January, Evening Shift — Question 27

The amphoteric oxide among $\mathrm{V}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{4}$ and $\mathrm{V}_{2} \mathrm{O}_{5}$ upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is :

Option A:
3
Option B:
7
Option C:
5
Correct
Option D:
4

Answer: C

Step-by-step solution

$\quad \mathrm{V}_{2} \mathrm{O}_{5}+$ alkali $\rightarrow \mathrm{VO}_{4}^{3-}$

In $\mathrm{VO}_{4}^{3-}$ ion, vanadium is in +5 oxidation state

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Exam: JEE Main 2025
Paper: 28 January, Evening Shift
Subject: Chemistry
Chapter: d and f Block Elements
Topic: Properties of general compounds of transition elements

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Answer: C

Step-by-step solution

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