Question

The heats of neutralisation of four acids $A,B,C$ and $D$ when neutralised against a common base are $13$. $7,9.4,11.2$, and $12.4kcal$ respectively. The weakest and strongest among these acids are respectively

• A. $B$ and $A$
• B. $A$ and $C$
• C. $C$ and $D$
• D. $A$ and $B$

Answer 1

Answer: (A)

Lower the value of heat of neutralisation, weaker is the acid and vice-versa. Hence, $B$ is the weakest and $A$ is the strongest acid among the given acids.