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  • Which of the following is amphoteric oxide? {Mn}_{2} {O}_{7}, {CrO}_{3}, {Cr}_{2} {O}_{3}, {CrO}, {V}_{2} {O}_{5} {V}_{2}xt {O}_{4} (i) {V}_{2} {O}_{5} {Cr}_{2} {O}_{3} (ii) {Mn}_{2} {O}_{7} {CrO}_{3}

Which of the following is amphoteric oxide?

\text {Mn}_{2}\text {O}_{7}, \text {CrO}_{3}, \text {Cr}_{2}\text {O}_{3},\text {CrO}, \text {V}_{2}\text {O}_{5},\text {V}_{2}\text {O}_{4}

(i) \text {V}_{2}\text {O}_{5}, \text {Cr}_{2}\text {O}_{3}

(ii) \text {Mn}_{2}\text {O}_{7}, \text {CrO}_{3}

(iii) \text {CrO}, \text {V}_{2}\text {O}_{5}

(iv) \text {V}_{2}\text {O}_{5}, \text {V}_{2}\text {O}_{4}

Answers (1)

The answer is the option (i). Since they react with both acids and bases,  \text {V}_{2}\text {O}_{5}  and \text {Cr}_{2}\text {O}_{3} are amphoteric oxides.

Also, the basic character is predominant in lower oxides whereas the acidic character is predominant in higher oxides

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infoexpert23

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