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How many of the following are basic
A) $V_{2} O_{3}$ B) $V_{2} O_{4}$ C) ${Cr}_{2} O_{3}$ D) $V_{2} O_{5}$

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A , B only

A , B ,D only

B , C only

A , B , C , D

answer is A.

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Detailed Solution

$V_{2} O_{3}$ - basic

$V_{2} O_{4}$ - weakly basic

$V_{2} O_{5}$ - amphoteric with more acidic character

${Cr}_{2} O_{3}$ - amphoteric

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