Q.

Which of the following reactions does not involve either oxidation or reduction?

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a

VO2+→ V2O3

b

Na→ Na⊕

c

CrO42-→ Cr2O72-

d

Zn2+→ Zn

answer is C.

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Detailed Solution

Cr+6O42−→ Cr2+6O72−Since oxidation state of Cr in both reactant and product is same
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Which of the following reactions does not involve either oxidation or reduction?