Write a balanced chemical equation for each of the following.
(i) Action of heat on aluminum hydroxide.
(ii) Reaction of zinc with potassium hydroxide solution.

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Solution

Action of heat on aluminum hydroxide.
Aluminum hydroxide $(A l {(O H)}_{3})$ on heating gives aluminum oxide
$(A l_{2} O_{3}) a n d w a t e r (H_{2} O) 2 A l {(O H)}_{3} \to A l_{2} O_{3} + 3 H_{2} O$
Reaction of zinc with potassium hydroxide solution.
Zinc $(Z n)$ on reacting with potassium hydroxide $(K O H)$ gives Potassium zincate $(K_{2} Z n O_{2})$ and hydrogen gas $(H_{2})$
$Z n + 2 K O H \to K_{2} Z n O_{2} + H_{2} (↑)$
Therefore, below are the answers:
Action of heat on aluminum hydroxide.
$2 A l {(O H)}_{3} \to A l_{2} O_{3} + 3 H_{2} O$
Reaction of zinc with potassium hydroxide solution.
$Z n + 2 K O H \to K_{2} Z n O_{2} + H_{2} (↑)$

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Write a balanced chemical equation for each of the following. (i) Action of heat on aluminum hydroxide.(ii) Reaction of zinc with potassium hydroxide solution.

Write a balanced chemical equation for each of the following.
(i) Action of heat on aluminum hydroxide.
(ii) Reaction of zinc with potassium hydroxide solution.