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Preparations and Uses of Sodium Bicarbonate and Common Salt

Which of the ...

Question

Which of the following give brisk effervescence with baking soda ?

A

methanoic acid

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B

propanoic acid

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C

ethanoic acid

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D

all of these

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Solution

The correct option is C all of these
The carboxylic acids react with baking soda to form sodium acetate, carbon dioxide and water. The general reaction can be written as:
$R C O O H + N a H C O_{3} \to C H_{3} C O O N a + C O_{2} + H_{2} O$
Thus the effervescence results from the release of carbon dioxide gas.

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Preparations and Uses of Sodium Bicarbonate and Common Salt

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