AIIMS 2014 Chemistry Colligative properties MCQ Question
Assertion Addition of a non-volatile solute to a volatile solvent increases the boiling point. Reason Addition of non-volatile solute results in lowering of vapour pressure.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are false
Correct Answer
Detailed Explanation
The correct answer is A because both the assertion and reason are true: the addition of a non-volatile solute to a volatile solvent increases the boiling point due to the elevation of boiling point, which is a colligative property. This occurs because the presence of the solute lowers the vapor pressure of the solvent, requiring a higher temperature to reach the boiling point. Thus, the reason correctly explains the assertion.
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