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  4. The solubility of AgI in NaI solution is less than that in pure water because

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Q. The solubility of $ AgI $ in $ NaI $ solution is less than that in pure water because

Rajasthan PETRajasthan PET 2011

Solution:

The solubility of $ AgI $ in $ NaI $ solution is less than that in pure water because solubility is decreased due to common ion effect.
$ AgI \rightleftharpoons A{{g}^{+}}+{{I}^{-}} $
$ NaI \rightleftharpoons N{{a}^{+}}+\underset{common\text{ }ion}{\mathop{{{I}^{-}}}}\, $