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Question

Assertion (A): Al(OH)3 is amphoteric in nature.
Reason (R): Al(OH)3 is H+ donor acid as well as OH donor base.

A
(A) is correct; (R) is correct and (R) correctly explains (A).
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B
(A) is correct; (R) is correct and (R) doesn't explain (A) correctly.
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C
(A) is correct; (R) is incorrect.
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D
(A) is incorrect; (R) is correct.
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Solution

The correct option is C (A) is correct; (R) is incorrect.
Al(OH)3 sure is amphoteric. It can react with both an acid as well as a base:

Al(OH)3+3HClAlCl3+3H2O
Al(OH)3+3NaOHNa[Al(OH)4]

It is not a H+ donor. Hence assertion is true but the reason is false.

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