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JEE Advanced 2015Paper 1
Exam
JEE Advanced
Year
2015
Paper
Paper 1
Subject
Chemistry
Chapter
d and f Block Elements

JEE Advanced 2015 · Paper 1 · Chemistry · d and f Block Elements

The correct statement(s) about C r ^ 2 + and M n ^ 3 + is (are)...

The correct statement(s) about Cr2+C{r}^{2 +} and Mn3+M{n}^{3 +} is (are)
[Atomic number of Cr = 24 and Mn = 25]

Options

  1. ACr2+C{r}^{2 +} is a reducing agent
  2. BMn3+M{n}^{3 +} is an oxidizing agent
  3. CBoth Cr2+C{r}^{2 +} and Mn3+M{n}^{3 +} exhibit d4{d}^{4} electronic configuration
  4. DWhen Cr2+C{r}^{2 +} is used as a reducing agent, the chromium ion attains d5{d}^{5} electronic configuration.

Correct answer

A. Cr2+C{r}^{2 +} is a reducing agent

Step-by-step solution

Cr2++Mn3+⇌Cr3++Mn2+C{r}^{2 +} + M{n}^{3 +} ⇌ C{r}^{3 +} + M{n}^{2 +}
Cr2+C{r}^{2 +} is a reducing agent agent Mn3+M{n}^{3 +} is an oxidizing agent both Cr2+ and Mn3+C{r}^{2 +} \text{ and } M{n}^{3 +} exhibit d4{d}^{4} electronic configuration.
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