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I. Multiple Choice Questions (Type-I) 1. Which of the ...

NCERT Exemplar solutions of Class 12 Chemistry Chapter 2 solutions . I. Multiple Choice Questions (Type-I) 1. Which of the following units is useful in relating the concentration of a solution with its vapour pressure ? (i) mole fraction (ii) parts per million (iii) mass percentage (iv) molality Solution: Option (i) is the answer. 2. On dissolving sugar in water at room temperature solution feels cool to touch. Under Which of the following cases dissolution of sugar will be most rapid? (i) Sugar crystals in cold water. (ii) Sugar crystals in hot water. (iii) Powdered sugar in cold water. (iv) Powdered sugar in hot water. Solution: Option (iv) is the answer.

(iii) Decreasing order of osmotic pressure for 0.01 M aqueous solutions of . barium chloride, potassium chloride, acetic acid and sucrose is . BaCl2> KCl > CH3COOH > sucrose. (iv) According to Raoult’s law, the vapour pressure exerted by a volatile . component of a solution is directly proportional to its mole fraction in . the solution ...

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