Chapter 6: Water

Q&A -Ask Doubts and Get Answers

Q
Water

Question:

State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.

(b) Steam rising from wet clothes while they are ironed.

(c) Fog appearing on a cold winter morning.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

Answer:

The process of changing water into water vapor on heating is called evaporation. The process of changing water vapor into liquid on cooling is called condensation.

(a) Water drops appear on the outer surface of a glass containing cold water. {Condensation}

(b) Steam rising from wet clothes while they are ironed. {Evaporation}

(c) Fog appearing on a cold winter morning. {Condensation}

(d) Blackboard dries up after wiping it. {Evaporation}

(e) Steam rising from a hot girdle when water is sprinkled on it. {Evaporation}


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