Which of the following oxides of Cr is amphoteric

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CrO2

Cr2O3

CrO5

CrO3

answer is A.

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Detailed Solution

Acidic nature of oxides increases with the increase in O.S. of the metal atom e.g.,, Cr2O3 , is basic . CrO2 acidic CrO5 is also acidic in nature

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