Read the Assertion and Reason below and choose the correct option. — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Adding a non-volatile solute to a solvent physically blocks the surface, lowering the vapour pressure (Statement II). Because the vapour pressure is lower, the solution must be heated to a higher temperature to make its vapour pressure equal to the external atmospheric pressure, causing an elevation in boiling point (Statement I). Both are correct and II explains I. Therefore, correct answer is A.