In a solution of a non-volatile solute, how does the vapor pressure compare to t

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Question: In a solution of a non-volatile solute, how does the vapor pressure compare to that of the pure solvent?

Options:

Correct Answer: Lower than the pure solvent

Solution:

The presence of a non-volatile solute lowers the vapor pressure of the solvent compared to that of the pure solvent.

In a solution of a non-volatile solute, how does the vapor pressure compare to that of the pure solvent?

In a solution of a non-volatile solute, how does the vapor pressure compare to that of the pure solvent?

Correct Answer: Vapor pressure kam hota hai.

Step 1: Understand what vapor pressure is. Vapor pressure is the pressure of a vapor in equilibrium with its liquid or solid form.
Step 2: Know what a non-volatile solute is. A non-volatile solute is a substance that does not easily evaporate into a gas.
Step 3: Recognize that when a non-volatile solute is added to a solvent, it does not contribute to the vapor pressure because it does not evaporate.
Step 4: Realize that the presence of the non-volatile solute means there are fewer solvent molecules at the surface that can escape into the vapor phase.
Step 5: Conclude that because there are fewer solvent molecules escaping, the vapor pressure of the solution is lower than that of the pure solvent.

Vapor Pressure Lowering – The phenomenon where the vapor pressure of a solvent decreases when a non-volatile solute is added, due to the solute particles occupying space at the surface and reducing the number of solvent molecules that can escape into the vapor phase.