An example of a reversible reaction

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$2 Na (s) + 2 H_{2} O (l) \to 2 NaOH (aq) + H_{2} (g)$

$Pb {({NO}_{3})}_{2} (aq) + 2 Na (aq) \to {Pb}_{2} (s) + 2 {NaNO}_{3} (aq)$

${CH}_{3} {COOC}_{2} H_{5} (aq) + H_{2} O (l) \to {CH}_{3} COOH (aq) + C_{2} H_{5} OH (aq)$

${AgNO}_{3} {(aq)}_{(} + HCl (aq) \to AgCl (s) + {NaNO}_{3} (aq)$

answer is D.

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Detailed Solution

Most of the equilibrium reactions are reversible. Out of the given options, ${CH}_{3} {COOC}_{2} H_{5} (aq) + H_{2} O (l) \to {CH}_{3} COOH (aq) + C_{2} H_{5} OH (aq)$ is a reversible reaction. In this case, the reactants and products are stable in nature. Ethyl ethanoate decomposes to form ethanol and acetic acid in presence of water. Ethanol and acetic acid combine to form ethyl ethanoate and water. Hence, option (D) is correct.