Which of the following is an amphoteric oxide?

MgO

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A l_{2} O_{3}

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S i O_{2}

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P_{2} O_{5}

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Solution

The correct option is B $A l_{2} O_{3}$
a. $M g O$ is basic in nature.

b. $A l_{2} O_{3}$ can react both as an acid and as a base. Hence, it is amphoteric in nature.

c. $S i O_{2}$ is very mildly acidic in nature.

d. $P_{2} O_{5}$ is acidic in nature.

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B_{2} O_{3}, A l_{2} O_{3}

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