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Question
Assertion (A): Elevation in boiling point is a colligative property.
Reason (R): The lowering of vapour pressure of solution causes elevation in boiling point.
Options
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
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Solution
Both (A) and (R) are true and (R) is the correct explanation of (A).
Explanation:
The boiling point of a solution rises as its vapour pressure falls. As a result, an increase in boiling point is a colligative feature.
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