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NEET2014Chemistry-Inorganic Chemistry

NEET 2014 Chemistry Oxidation States MCQ Question

Type: MCQ-conceptual-Medium-Class 11

In acidic medium, H₂O₂ changes Cr₂O₇²⁻ to CrO₅ which has two (O–O) bonds. Oxidation state of Cr in CrO₅ is

A

+5

B

+3

C

+6

D

-10

Correct Answer

Option A

Detailed Explanation

In CrO₅, Cr is in the +5 oxidation state as the peroxo linkage contribute $s^{-1}$ each, balancing the overall charge.

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