Question

6. In which of the following cases, evaporation of water will be the slowest.

• A. A tray of water kept in sunlight
• B. A kettle of water kept on a burner
• C. A glass of water kept in a room
• D. A bucket of water kept on the rooftop

Answer 1

The correct option is C

A glass of water kept in a room

• The process of conversion of water into water vapor or gas is known as evaporation.
• The higher the temperature, the faster will be the rate of evaporation.

Explanation of correct option:

(C) A glass of water kept in a room:

• There is no sunlight in the room or no extra heat supplied to the glass of water.
• So, in this case, evaporation takes place at the slowest rate.

Explanation of incorrect option:

(A) A tray of water kept in sunlight:

• Here, a tray of water is kept in sunlight. So, heat is supplied in the form of sunlight.
• Therefore, in this case, evaporation takes place at a faster rate.

(B) A kettle of water kept on a burner:

• Here, a kettle of water is kept on a burner. So, extra heat is supplied through the burner.
• So, in this case, evaporation takes place at a faster rate.

(D) A bucket of water kept on the rooftop:

• Here, a bucket of water is kept on the rooftop where sunlight reaches. So. heat is supplied in the form of sunlight.
• So, in this case, evaporation takes place at a faster rate.

Conclusion: Hence, option (C) is correct.