Which one of the following statements is false?

Raoult's law states that the vapour pressure of a component over a solution is proportional to its mole fraction

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The osmotic pressure

(π)

of a solution is given by the equation

π = M R T

, where, M is the molarity of the solution

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The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is

B a C l_{2} > K C l > C H_{3} C O O H > s u c r o s e

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Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression

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Solution

The correct option is D Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression
$Δ T_{f} = K_{f} m$

Different solvents will have different values of $K_{f}$ . So $Δ T_{f}$ for the two solutions of sucrose will be different.

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Question 14
Which of the following statements is false?
(a) Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.
(b) The osmotic pressure of a solution is given by the equation $π = C R T$ (where, C is the molarity of the solution)
(c) Decreasing order of osmotic pressure for 0.01 M aqueous solutions of barium chloride, potassium chloride, acetic acid and sucrose is
$B a C l_{2} > K C l > C H_{3} C O O H > s u c r o s e$
(d) 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