Which of the following is an ester? A. CH3COOH B. CH3COCH3 C. CH3COOC2H5 D. CH3CHO

CH3COOH
CH3COCH3
CH3COOC2H5
CH3CHO

The correct answer is C. CH3COOC2H5.

An ester is an organic compound that is formed when a carboxylic acid reacts with an alcohol. The general formula for an ester is R-COO-R’, where R and R’ are alkyl groups.

In option A, CH3COOH, the compound is acetic acid, which is a carboxylic acid. In option B, CH3COCH3, the compound is acetone, which is a ketone. In option C, CH3COOC2H5, the compound is ethyl acetate, which is an ester. In option D, CH3CHO, the compound is acetaldehyde, which is an aldehyde.

Esters are typically sweet-smelling compounds that are used in perfumes and other fragrances. They are also used in the production of plastics, resins, and solvents.

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