Humidity

Q. is the process by which water vapor in the air is changed into liquid water.

1. Evaporation
2. Sublimation
3. Condensation

Q. Full explanation on dew point and humidity

Q.

The amount of water vapour in the air is known as humidity.

1. Increase

2. Decrease

Q. The weather report reads, “Temperature ${20}^{\circ }C$: Relative humidity $100\%$”. What is the dew point?

1. Can’t be said.
2. Less than ${20}^{\circ }C$
3. ${20}^{\circ }C$
4. More than ${20}^{\circ }C$

Q. What is Humidity?

Q. The moisture in the atmosphere is called______.

1. salinity
2. humidity
3. density
4. viscosity

Q. Find the terminology depicted by the following images.

1. 
2. 
3. 
4. 

Q.

Give one word/ a few words for each of the following.

A mixture of rain and snow

Q. The saturated vapour pressure of water at ${100}^{\circ }C$ is :

1. $750mm$ of $Hg$
2. $760mm$ of $Hg$
3. $76mm$ of $Hg$
4. $7.6mm$ of $Hg$

Q. Trail of cloud from a flying plane​ is formed due to .

1. velocity change
2. pressure change
3. mass change

Q. It becomes cold during snowfall. Why ?

Q. When the room temperature becomes equal to the dew point, the relative humidity of the room is

1. $100$%
2. Zero%
3. $70$%
4. $85$%

Q. When it is raining, the dew point is:

1. 0${}^o$C
2. 60${}^o$C
3. 100${}^o$C
4. room temperature

Q. The phase change of a substance from gas to a liquid is called ______.

1. evaporation
2. distillation
3. condensation
4. boiling

Q. Humidity is given by the ratio of to .

1. water vapour mass
2. air mass
3. air volume
4. water vapour volume

Q. The temperature and the dew point in an open room are ${20}^{\circ }C$ and ${10}^{\circ }C$. If the room temperature drop to ${15}^{\circ }C$, What will be the new dew point?

Q. On a particular day, the relative humidity is 100% and room temperature is ${30}^0$C, then the dew point is

1. ${30}^{0}C$
2. ${70}^{0}C$
3. ${100}^{0}C$
4. $0^{0}C$

Q. On what basis and how will you determine whether air is saturated with vapor or not?

Q. Formation of dew is an example for ......

1. Boiling
2. Evaporation
3. Melting
4. Condensation

Q. When air is saturated, it cannot hold any more water vapour. State whether true or false.

1. True
2. False