The $- C O O H$ group in a carboxylic acid can be replaced by hydrogen atom by heating the acid with:

Z n

and

H C l

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H_{2}

in the presence of nickel

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sodalime

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bromine and concentrated aqueous alkali

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Solution

The correct option is D sodalime
The $- C O O H$ group in a carboxylic acid can be replaced by hydrogen atom by heating the acid with sodalime, which acts as a decarboxylating agent.

$C H_{3} C H_{2} C O O N a + N a O H C a O - --------- \to D e c a r b o x y l a t i o n C H_{3} C H_{3} + N a_{2} C O_{3}$

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