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NEETChemistryd and f Block Elements

Why is Cr2+ reducing?

Options

  1. ABecause its d4 configuration changes to d3.
  2. BBecause its d4 configuration changes to d5.
  3. CBecause its d4 configuration changes to d2.
  4. DBecause its d4 configuration changes to d6.

Correct answer

A. Because its d4 configuration changes to d3.

Step-by-step solution

Cr2+ is reducing as its configuration changes from d4 to d3, which results in a half-filled t 2g level.

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