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Question

The correct statement(s) about Cr2+ and Mn3+ is(are)
[Atomic numbers of Cr=24 and Mn=25]

A
Cr2+ is a reducing agent
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B
Mn3+ is an oxidizing agent
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C
Both Cr2+ and Mn3+ exhibit d4 electronic configuration
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D
When Cr2+ is used as a reducing agent, the chromium ion attains d5 electronic configuration.
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Solution

The correct options are
A Cr2+ is a reducing agent
B Mn3+ is an oxidizing agent
C Both Cr2+ and Mn3+ exhibit d4 electronic configuration
Cr2++Mn3+Cr3++Mn2+

Here, Cr2+ is a reducing agent and Mn3+ is an oxidising agent. Both Cr2+ & Mn3+ have d4 electronic configuration.

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