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Chemistry CBSE Live product
Class 9
Matter in our surroundings
Annual Revision I - Matter in our surroundings
3.
Evaporation
Question:
2
m.
Choose the correct answer:
1.
Why does the remaining liquid feel cooler during evaporation?
Because heat is released to the surroundings
Because the liquid becomes more dense
Because heat is absorbed from the surroundings to help molecules escape
Because all molecules slow down uniformly
2.
A puddle of water dries faster on a hot sunny day than on a cool cloudy day. Which factor mainly causes this difference?
Temperature does not affect evaporation
Evaporation occurs throughout the bulk at higher temperatures
Cooler air removes more molecules from the surface
Higher temperature increases the kinetic energy of water molecules, allowing more to escape
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