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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -13.2, -13.4, -2.9 and -3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength
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03/10/2021 12:12 pm
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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -13.2, -13.4, -2.9 and -3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength
(a) HCOOH > CH3COOH > H2S > HCN
(b) CH3COOH > HCOOH > H2S > HCN
(c) H2S > HCOOH > CH3COOH > HCN
(d) HCOOH > H2S > CH3COOH > HCN
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03/10/2021 12:14 pm
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Correct answer: (a) HCOOH > CH3COOH > H2S > HCN
Explanation:
The greater the (negative value) of heat of neutralisation, the more is the strength of the acid.
Hence, HCOOH > CH3COOH > H2S > HCN
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