JEE Main Chemistry question

In which case of mixing of a strong acid and a base, each of 1N concentration, is the temperature increase highest?

(A)20 mL acid − 20 mL alkaliCorrect
(B)10 mL acid − 40 mL alkali
(C)25 mL acid − 25 mL alkaliCorrect
(D)35 mL acid − 15 mL alkali

Answer: (A),(C)

Solution

With both solutions at the same normality, maximum heat release (per unit volume) occurs at the stoichiometric 1:1 mixing ratio, since any excess of either reagent only dilutes the mixture without releasing extra heat. Both (a) (20:20)

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Question ID VK-135306