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Properties & Uses of Aluminium

Hydrogen gas ...

Question

Hydrogen gas is liberated by the action of aluminium with concentrated solution of ________.

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Solution

Sodium hydroxide and aluminium react to form sodium tetrahydroxoaluminate(III) and hydrogen gas. The pressure of the produced hydrogen gas is used to open blocked drains.

$2 A l + 2 N a O H + 6 H_{2} O \to 2 N a^{+} [A l (O H)_{4}] + 3 H_{2}$

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