The heats of neutralization of four acids A, B, C, D are $- 13.7, - 9.4, - 11.2, - 12.4 k c a l$ respectively, when they are neutrelized by a common base. The acidic character obeys the order :

A>B>C>D

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A>D>C>B

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D>C>B>A

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D>B>C>A

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Solution

The correct option is B A>D>C>B
Greater the heat of neutralization, more stronger is the acid ot more is the acidic strength.
So, the acidic character order is A>D>C>B .

Note : Greater the enthalpy of ionization of any acid or base, weaker will be the acid or base.

Acidic strength of acid proportional to Magnitude of $Δ_{n e u t} H$ .

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Enthalpy of Neutralisation

Standard XIII Chemistry

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