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Q.

Which of the following are amphoteric oxide?
${Mn}_{2} O_{7}, {CrO}_{3}, {Cr}_{2} O_{3}, CrO, V_{2} O_{5}, V_{2} O_{4}$

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a

$CrO, V_{2} O_{5}$

b

${Mn}_{2} O_{7}, {CrO}_{3}$

c

$V_{2} O_{5}, V_{2} O_{4}$

d

$V_{2} O_{5}, {Cr}_{2} O_{3}$

answer is A.

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Detailed Solution

$V_{2} O_{5}$ and ${Cr}_{2} O_{3}$ are amphoteric oxides.

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Which of the following are amphoteric oxide? Mn2O7,CrO3,Cr2O3,CrO,V2O5, V2O4