
- A

- ✓

- C

- D








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$(A)$ ${SO}_{3}$ $(B)$ ${NO}_{3}^{-}$ $(C)$ ${PCl}_{3}$ $(D)$ ${CO}_{3}^{2-}$
$\mathrm{CH}_{3} \mathrm{COOH}+\mathrm{SOCl}_{2} \longrightarrow \mathrm{A} \xrightarrow[AlCl_3]{Benzene} \mathrm{B} \xrightarrow[-OH]{KCN} \mathrm{C}$

Assertion ($A$): Enthalpy of neutralisation of strong monobasic acid with strong monoacidic base is always $-57 \mathrm{~kJ} \mathrm{~mol}^{-1}$
Reason ($R$): Enthalpy of neutralisation is the amount of heat liberated when one mole of $\mathrm{H}^{+}$ions furnished by acid combine with one mole of ${ }^{-} \mathrm{OH}$ ions furnished by base to form one mole of water. In the light of the above statements, choose the correct answer from the options given below.