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Standard X

Chemistry

Carbonates

A substance A...

Question

A substance A reacts with another substance B to produce the product C and a gas D. If a mixture of the gas D and ammonia is passed through an aqueous solution of C, baking soda is formed. The substances A and B are:

H C l

and

N a O H

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H C l

and

N a_{2} C O_{3}

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N a

and

H C l

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N a_{2} C O_{3}

and

H_{2} O

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Solution

The correct option is B $H C l$ and $N a_{2} C O_{3}$
A substance A reacts with another substance B to produce the product C and a gas D.
$N a_{2} C O_{3} + 2 H C l \to 2 N a C l + H_{2} O + C O_{2}$
If a mixture of the gas D and ammonia is passed through an aqueous solution of C, baking soda is formed.
$N a C l + H_{2} O + C O_{2} + N H_{3} \to N a H C O_{3} + N H_{4} C l$
The substances A and B are HCl and Na $_{2}$ CO $_{3}$ respectively.

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