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Diagonal Relationship

Which of the ...

Question

Which of the following oxides of chromium is amphoteric in nature

A

C r O

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B

C r_{2} O_{3}

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C

C r O_{3}

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D

n o n e

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Solution

The correct option is B $C r_{2} O_{3}$
$C r O$ - basic
$C r_{2} O_{3}$ - amphoteric
$C r O_{3}$ - Acidic
With the increasing oxidation number, acid character increases

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