Assertion :Salt dissolved in water lowers the freezing point. Reason: The change in freezing point is given by: $Δ T_{f} = i K_{f} m$ .

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
We have,
$Δ T_{f} = i K_{f} m$ to calculate the change in freezing point,
on adding salt the value of $i$ increases and hence, the freezing point of water decreases.

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