Equilibrium Question 361

Question: The values of dissociation constants of some acids (at $ 25^{o}C $ ) are as follows. Indicate which is the trongest acid in water [MP PMT 1991]

Options:

A) $ 1.4\times {10^{-2}} $

B) $ 1.6\times {10^{-4}} $

C) $ 4.4\times {10^{-10}} $

D) $ 4.3\times {10^{-7}} $

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Answer:

Correct Answer: A

Solution:

More is $ K_{a} $ , lesser is $ pK_{a},(pK_{a}=-\log K_{a}) $ more is acidic strength.



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