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NEET levelSingle correct optionDifficulty 1 of 3ie007

When a solution of a weak electrolyte is diluted at constant temperature, the degree of ionisation and the ionisation constant respectively

Adecrease and remain constant
Bincrease and increase
Cincrease and remain constant
Dremain constant and decrease

Answer: C

By Ostwald's dilution law

α \approx K_{a} / c

, so lower

c

gives larger

α

.

K_{a}

depends only on temperature and stays constant.

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