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Question

Which of the following is an amphoteric hydroxide?

A
Mg(OH)2
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B
Be(OH)2
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C
Ca(OH)2
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D
Sr(OH)2
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Solution

The correct option is B Be(OH)2
Amphoteric substances are those substances which can react both as acid and as a base.

Be(OH)2 is amphoteric in nature since it can react both with acid and base.

Be(OH)2+2HClBeCl2+2H2O

Be(OH)2+2NaOHNa2[Be(OH)4]

Mg(OH)2, Ca(OH)2,and Sr(OH)2 are basic hydroxides.

Hence, option (b) is correct.

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