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

N a H C O_{3}

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N a_{2} C O_{3}

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N a O H

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none of these

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Solution

The correct option is C $N a O H$
$2 A l + 2 N a O H + 2 H_{2} O \to 2 N a A l O_{2} + 3 H_{2}$
This reaction is extremely quick and produces a lot of energy.
This reaction occurs because $A l$ is always covered by a layer of un-reactive ${A l}_{2} O_{3}$ layer has to be taken down first.

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Similar questions

On passing $C O_{2}$ , through concentrated solution of $N a_{2} C O_{3}$ gives

$N a_{2} C O_{3} + H_{2} O + C O_{2} \to$ ___

C O_{2}

C O_{2}

N a O H, 2.8 l i t r e

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