Identify the organic compound $A$ which is widely used as a preservative in pickles and has a molecular formula $C_{2} H_{4} O_{2}$ . This compound reacts with ethanol to form a sweet-smelling compound $B$ .

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Solution

The compound $A$ is ethanoic acid or vinegar, i.e, $C H_{3} C O O H$ .

It reacts with ethanol to form a sweet-smelling compound $B$ -
$C H_{3} C O O H + C_{2} H_{5} O H ⟶ C H_{3} C O O C_{2} H_{5} + H_{2} O$
$A$ $B$

The compound B is $e t h y l e t h a n o a t e$ or $e t h y l a c e t a t e$ .
Also, the compound $A$ is $e t h a n o i c a c i d .$

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Identify the organic compound A which is widely used as a preservative in pickles and has a molecular formula C2H4O2. This compound reacts with ethanol to form a sweet-smelling compound B.

The compound A is ethanoic acid or vinegar, i.e, CH3COOH.It reacts with ethanol to form a sweet-smelling compound B -CH3COOH+C2H5OH⟶CH3COOC2H5+H2O A BThe compound B is ethyl ethanoate or ethyl acetate.Also, the compound A is ethanoic acid.

Identify the organic compound $A$ which is widely used as a preservative in pickles and has a molecular formula $C_{2} H_{4} O_{2}$ . This compound reacts with ethanol to form a sweet-smelling compound $B$ .