During the evaporation of liquid

Options

A. The temperature of the liquid will rise
B. The temperature of the liquid will fall
C. May rise or fall depending on the nature
D. The temperature remains unaffected

Answer

**Step-by-Step Solution:**

1. **Understanding Evaporation**: Evaporation is the process where liquid molecules transition into the vapor phase. This occurs at the surface of the liquid.

2. **Energy of Molecules**: In a liquid, molecules have varying energy levels. Some molecules possess higher kinetic energy than others.

3. **Molecules Leaving the Surface**: During evaporation, it is primarily the molecules with higher kinetic energy that escape from the surface of the liquid into the vapor phase.

4. **Effect on Average Kinetic Energy**: When these high-energy molecules leave, the average kinetic energy of the remaining liquid molecules decreases.

5. **Relation to Temperature**: Since temperature is a measure of the average kinetic energy of the molecules in a substance, a decrease in average kinetic energy results in a decrease in temperature.

6. **Conclusion**: Therefore, during the evaporation of a liquid, the temperature of the liquid will fall.

**Final Answer**: The temperature of the liquid will fall (Option B).

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