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Question: Which of the following hydroxides is acidic?...

Which of the following hydroxides is acidic?

A

Al(OH)3Al(OH)_{3}

B

Ga(OH)3Ga(OH)_{3}

C

Tl(OH)3Tl(OH)_{3}

D

B(OH)3B(OH)_{3}

Answer

B(OH)3B(OH)_{3}

Explanation

Solution

: B(OH)3B(OH)_{3}orthoboric acid is acidic in nature and can accept OH−OH^{-} ions to release H+H^{+} in solution.

H3BO3+H2O→H3O++H2BO3−H_{3}BO_{3} + H_{2}O \rightarrow H_{3}O^{+} + H_{2}BO_{3}^{-}