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Preparations and Uses of Caustic Soda

Which of the ...

Question

Which of the following on heating 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 $Z n$
Sodium hydroxide( $N a O H$ ) reacts with zinc( $Z n$ ) to form sodium zincate $(N a_{2} Z n O_{2})$ along with liberation of inflammable hydrogen gas.

$Z n + 2 N a O H \to N a_{2} Z n O_{2} ↓ + H_{2}$

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Preparations and Uses of Caustic Soda

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