Question

Formation of dew is an example for ________.
     A) Boiling
     B) Melting
     C) Condensation
     D) Evaporation

Answer 1

Hint: Dew is the formation of small water droplets, usually on winter mornings on the surface of objects such as cars and leaves of plants. It happens more so, when the weather has been foggy, that is the air has been full of water vapor, the night before.

Complete step by step answer:
Dew are the small droplets of water that are formed on winter mornings on the surfaces of cold objects such as cars and leaves. Dew happens due to the water vapour in the surrounding air coming in contact with the cold surface and transferring its heat to it. This loss of heat leads to the water vapor condensing into water droplets on the surfaces of the objects.
Condensation is the process of conversion of a liquid from its vapor form to its liquid form, which is what happens in the process of formation of dew.
Hence, formation of dew is an example for condensation.
Therefore, the correct answer is C) Condensation.

Additional information:
Dew is formed more on the mornings after the nights in which the air is foggy. This is because foggy air means that the air was filled with water vapor. Presence of excess water vapor in the air promotes greater condensation of the water vapor to form dew.

Note: Students should not confuse dew with snow. Snowfall occurs when the water vapor in the clouds directly gets converted into the solid form without passing through the intermediate liquid stage. This happens when the temperature of the atmosphere is below the freezing point of water, that is, ${{0}^{0}}C$. However, as explained above, in the formation of dew, water vapor converts into the liquid form and not the solid form.