Assertion : $1 M$ solution of $K C l$ has greater osmotic pressure than $1 M$ solution of glucose at the same temperature. Reason: In solution $K C l$ dissociates to produce more number of particles.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In case of KCl we have,

$π = i C R T$ , $i = 2$

and in case of glucose, we have

$π = i C R T, i = 1$

Hence, KCl solution has greater osmotic pressure because KCl is dissociates to produce number of particles(i =2).

Osmotic pressure in KCl solution increase due to dissociation.

Hence, option (A) is correct.

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