Equilibrium Question 353

Question: The degree of dissociation of $ 0.1,M,HCN $ solution is 0.01%. Its ionisation constant would be [RPMT 1999]

Options:

A) $ {10^{-3}} $

B) $ {10^{-5}} $

C) $ {10^{-7}} $

D) $ {10^{-9}} $

Show Answer

Answer:

Correct Answer: D

Solution:

$ HA $ ⇌ $ {H^{+}}+{A^{-}} $

$ K=Ca^{2}=0.1\times {{({10^{-4}})}^{2}}={10^{-9}} $



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