Question:
Benzene and toluene form an ideal solution over the entire range of composition. Hie vapour pressure of pure benzene and toluene at $T (K)$ are $50\, mm \,Hg$ and $40\, mm \,Hg$ respectively. What is the mole fraction of toluene in vapour phase when $117\, g$ of benzene is mixed with $46\, g$ of toluene ? (molar mass of benzene and toluene are $78$ and $92\, g\, mol^{-1}$ respectively)
Benzene and toluene form an ideal solution over the entire range of composition. Hie vapour pressure of pure benzene and toluene at $T (K)$ are $50\, mm \,Hg$ and $40\, mm \,Hg$ respectively. What is the mole fraction of toluene in vapour phase when $117\, g$ of benzene is mixed with $46\, g$ of toluene ? (molar mass of benzene and toluene are $78$ and $92\, g\, mol^{-1}$ 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:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- 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.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.