Condensation

Q. In condensation process does the surrounding air decrease its temperature or increase its temperature.

Q.

When water particles condenses on air on dust, it forms :-

1. Mist

2. Fog

3. Frost

4. Vapour

Q. Two identical bedsheets one crumbled and the other stretched are kept for drying in the same sunlight
a) which bed sheet will dry quickly?
b) Explain the scientific reason for your answer.

Q. Some water at 0 degree Celsius is placed in a large insulated closure .The water vapour formed is pumped out continuously.What fraction of water will ultimately freeze, if the latent heat of vaporisation is seven times the latent heat of fusion?

Q. What is the difference between Fog and Dew?
[2 marks]

Q. In which of the following processes do the change in the states of matter involve the absorption of energy?
A. Boiling
B. Sublimation
C. Condensation
D. Melting

1. A only
2. A and B only
3. A, B and C only
4. A, B and D

Q. Write the following statements in the form if ..... then;
Atmosphere humidity increases only if it rains.

Q. If the earth had no atmosphere, then at day time, the sky would appear as ___.

1. blue
2. white
3. black
4. red