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Chapter 25: Problem 6

Which of the following is a colligative property? (a) molar refractivity (b) optical rotation (c) depression in freezing point (d) viscosity

Short Answer

Expert verified
The colligative property among the options given is (c) depression in freezing point.

Step by step solution

01

Define Colligative Property

Colligative properties are properties of solutions that depend on the ratio of the number of solute particles to the number of solvent molecules in a solution, and not on the nature of the chemical species present. They include freezing point depression, boiling point elevation, vapour pressure lowering, and osmotic pressure.
02

Evaluate Each Choice

Evaluate each choice to determine which is based on the number of particles and not their nature. (a) Molar refractivity is a measure of the total polarizability of a mole of a substance and is not dependent on the number of particles. (b) Optical rotation is the rotation of the plane of polarized light by a substance, which depends on its structure, not the number of particles. (d) Viscosity is dependent on the intermolecular forces and not solely on the number of particles.
03

Select the Correct Colligative Property

From the above analysis, it is clear that only (c) Depression in freezing point aligns with the definition of colligative properties since it is dependent on the number of solute particles in a solution.

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Most popular questions from this chapter

The depression in freezing point is measured by using \(\Delta T\) \(K_{n} \times \frac{w}{m} \times \frac{1}{W}\) where \(K_{f}\) is called (a) molal depression constant (b) freezing point depression constant (c) cryoscopic constant (d) all of these

Freezing-point depression is measured by (a) Beckmann's method (b) Rast's camphor method (c) both (d) none of these

The ratio of the colligative effect produced by an electrolyte solution to the corresponding effect for the same concentration of a non-electrolyte solution is known as (a) degree of dissociation (b) degree of association (c) activity coefficient (d) van't Hoff factor

Molal elevation constant is the boiling point elevation when _____ of the solute is dissolved in one kg of the solvent. (a) one gram (b) one \(\mathrm{kg}\) (c) one mole (d) none of these

The elevation in boiling point is given by the formula $$\Delta x \quad K_{h} \times \frac{\mathfrak{w}}{m} \times \frac{1}{W}$$ where \(K_{b}\) is called (a) boiling point constant (b) ebullioscopic constant (c) molal elevation constant (d) all of these
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