Chemistry
Grade-6
Easy
Question
Which of the following statements are true or false?
(i) The percentage of water vapor in the air always remains fixed.
(ii) We cannot observe the dust particles directly in the air.
(iii) The amount of dust particles varies from place to place and time to time.
Hint:
Air is a mixture of gases. We are surrounded by the air from everywhere and the composition of this air is not the same everywhere.
The correct answer is:
The percentage of water vapor in the air always remains fixed - False
The temperature of the surrounding atmosphere limits the maximum amount of water vapor the atmosphere can contain.
We cannot observe the dust particles directly in the air - True
The size of the dust particle cannot be seen directly in the air due to their tiny size.
The amount of dust particles varies from place to place and time to time - True
The air is really a mixture of many different gases, and each gas has its own properties. The composition of air is not constant. It can vary from time to time and from place to place.
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