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Preparations and Uses of Sodium Bicarbonate and Common Salt

NaHCO3 on hea...

Question

$N a H C O_{3}$ on heating gives:

N a_{2} C O_{3}, H_{2}, O_{2}

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N a_{2} C O_{3}, H_{2}, C O_{2}

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N a C O_{3}, H_{2} O, C O_{2}

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N a_{2} C O_{3}, H_{2} O, C O_{2}

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Solution

The correct option is C $N a_{2} C O_{3}, H_{2} O, C O_{2}$
Sodium carbonate or washing soda or soda ash is the sodium salt of carbonic acid. It is prepared by passing carbon dioxide gas in a concentrated solution of sodium hydroxide. Further on heating, sodium bicarbonate gives sodium carbonate, $C O_{2}$ and water.
$N a H C O_{3} \to N a_{2} C O_{3} + C O_{2} + H_{2} O$

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