Question

Dust helps in the precipitation of water vapor present in the air.
A.True
B.False

Answer 1

Hint: As We know that air is everywhere. It surrounds us on this planet. No life can ever exist without air. Did you ever think about what air comprises? Is it a pure substance or a mixture? What process occurs in it. Let’s study in detail.

Complete answer:
In older times, the air was considered a pure substance but it was later when it was found out that air is not a pure substance but a mixture of many gases. Air’s composition is not constant, it changes accordingly from place to place like the areas which are polluted, there the composition of air will have more carbon dioxide compared to the other places.
Water vapor: Due to summer, the water which is present in the ocean and rivers evaporates and escapes in the surrounding. Water vapor is also one of the components air has but the percentage composition of it is very less.
Smoke and dust particles: The burning of fuel causes smoke in the atmosphere. Its composition also varies from place to place. It is also a mixture of gases and can cause harm to the environment.
Dust particles give the surface to the water vapor that is present in the atmosphere to condense. The vapor then condenses on these particles and together they form clouds and results in precipitation.
True, Dust helps in the precipitation of water vapor present in the air.

Note:
The percentage composition of air is-
           Nitrogen- 78%
           Oxygen- 20.9%
           Other gases- >0.17%
           Argon- >0.90%
           Carbon dioxide- 0.03%