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Preparations and Uses of Caustic Soda

Which one on ...

Question

Which one on reaction with NaOH solution gives inflammable gas?

A

$S$

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B

$Z n$

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C

$N H_{4} C l$

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D

$I_{2}$

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Solution

The correct option is B
$Z n$

$Z n + 2 H_{2} O + 2 N a O H ⟶ N a_{2} Z n (O H)_{4} + H_{2}$

As you can see - Zinc liberates hydrogen gas.

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