The reaction of sodium hydrogen carbonate with ethanoic acid is used as a test for detection of carboxylic acid, Why?

because carbon dioxide gas is produced in this reaction which can be easily identified.

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because acetic acid is soluble in water.

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because acetic acid can react with sodium hydrogen carbonate.

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because water is produced in this reaction which can be easily identified.

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Solution

The correct option is B because carbon dioxide gas is produced in this reaction which can be easily identified.
If you pour some dilute ethanoic acid onto some white sodium carbonate or sodium hydrogencarbonate crystals, there is an immediate fizzing as carbon dioxide is produced. You end up with a colourless solution of sodium ethanoate.
$N a H C O_{3}$ + $C H_{3} C O O H$ ---> $C H_{3} C O O N a$ + $H_{2} O$ + $C O_{2}$ .

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