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Assertion : Cr^(2+) is reducing and Mn^(...

Assertion : `Cr^(2+)` is reducing and `Mn^(3+)` is oxidising.
Reason : `Cr^(2+)` and `Mn^(3+)` have `d^4` configuration.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true and reason not is the correct explanation of assertion.

C

If assertion is trun but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
`Cr^(2+)` is reducing as its configuration changes from `d^4" to " d^3`(half-filled `t_(2g)`). The change from `Mn^(3+)` to `Mn^(2+)` results in the half -filled `d^5` configurations which has extra stability.
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