Assertion :When a solute is added to pure water, the vapor pressure of the water will decrease. Reason: All solutes dissociate into positive and negative ions.

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 C Assertion is correct but Reason is incorrect
When solute is added to pure water, the vapour pressure decreases because the solvent molecule present on the surface layer decreases because of the addition of the solute particle.

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Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

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