JEE Main Chemistry question

Electrolytes, when dissolved in water, dissociate into their constituent ions. The degree of dissociation of a weak electrolyte increases with

(A)The presence of a substance yielding a common ion
(B)Decreasing temperature
(C)Decreasing concentration of the electrolyteCorrect
(D)Increasing concentration of the electrolyte

Answer: (C)

Solution

For a weak electrolyte, the degree of dissociation increases on dilution (decreasing concentration), by Le Chatelier's principle / Ostwald's dilution law.

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Question ID VK-143507