Question:

Benzene and toluene form an ideal solution over the entire range of composition. Hie vapour pressure of pure benzene and toluene at T(K)T (K) are 50mmHg50\, mm \,Hg and 40mmHg40\, mm \,Hg respectively. What is the mole fraction of toluene in vapour phase when 117g117\, g of benzene is mixed with 46g46\, g of toluene ? (molar mass of benzene and toluene are 7878 and 92gmol192\, g\, mol^{-1} respectively)

Updated On: Apr 4, 2024
  • 0.78
  • 0.21
  • 0.64
  • 0.35
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The Correct Option is B

Solution and Explanation

Answer (b) 0.21
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Concepts Used:

Solutions

A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.

For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.

Types of Solutions:

The solutions can be classified into three types:

  • Solid Solutions - In these solutions, the solvent is in a Solid-state.
  • Liquid Solutions- In these solutions, the solvent is in a Liquid state.
  • Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.

On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:

  1. Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
  2. Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
  3. Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.