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Chapter 24: Problem 1

Relative lowering of vapour pressure of a solution containing a nonvolatile solute is equal to the mole fraction of (a) solute (b) solvent (c) solvent minus solute (d) solvent plus solute

Short Answer

Expert verified
The accurate answer is (a) solute.

Step by step solution

01

Understand the Raoult's Law

According to Raoult's law, the relative lowering of vapour pressure of a solution, which is the ratio of the decrease in vapour pressure to the original vapour pressure, is equal to the mole fraction of the solute. Mathematically, it can be expressed as \(\Delta P/P = x_{solute}\), where \(\Delta P\) is the decrease in vapour pressure, \(P\) is the original vapour pressure, and \(x_{solute}\) is the mole fraction of the solute.
02

Evaluate the Options

In this step, evaluate all options in accordance with the expression established in step 1. The expression \(x_{solute}\) refers to the mole fraction of the solute in the solution, so that the most accurate answer is the mole fraction of the solute.

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Most popular questions from this chapter

Mathematical form of Henry's law is (a) \(m=k_{p}\) (b) \(p=k_{m}\) (c) \(\mu \frac{k}{m}\) (d) \(m \frac{1}{k} p\)

In a solution, the vapour pressure of a component at a given temperature is equal to the mole fraction of that component in the solution multiplied by the vapour pressure of that component in the pure state. This is the statement of (a) Henry's law (b) Raoult's law (c) Konowaloff's law (d) none of the above

Addition of KCI to phenol-water system (a) raises the CST (b) lower the CST (c) has no effect on CST (d) none of the above

Which of the following is not true about the applicability of steam distillation? (a) The organic liquid to be purified should be immiscible with water. (b) It should have high molecular weight. (c) It should have high vapour pressure. (d) The impurities present should be volatile.

The vapour phase is relatively richer in the component whose addition to the liquid mixture results in an increase of total vapour pressure. This is the statement of (a) Duhem-Margules law (b) Raoult's law (c) Konowaloff's rule (d) none of the above
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