Carboxylic group is present in:

ethylene

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methanoic acid

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formaldehyde

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ethanol

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Solution

The correct option is A methanoic acid
When a carbon compound is attached to the functional group $- C O O H$ (carboxyl group) then the compound refers to as carboxylic acids. From above structure formula of methanoic acid is $H C O O H$ ,hence it contain carboxylic acid group.

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Similar questions

The functional group present in carboxylic acids is

- O H

(- O | | C - O H)

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