Question

When water particle condenses on air and dust, it forms:
A. Mist
B. Fog
C. Frost
D. Vapour

Answer 1

Hint: The elements and compounds in the environment exist in various forms based on the energy and temperature of the surroundings. When the conditions favor the high temperature the compounds tend to be in a state in which the molecules and atoms are mostly free to move and when the environment is of low temperature the compounds tend to convert to the state which packs the molecules close to each other.

Complete step by step answer:
Water exists in nature in the form of solid ice, liquid water, and gaseous water vapor. In the environment, it exists in the gaseous form.
When the temperature of the atmosphere decreases the water vapor in the environment tends to change state and convert to a liquid state.
The process of conversion of gaseous state to liquid state is called condensation and it is an exothermic process, on the other hand, the conversion of liquid to gas in environmental conditions is termed as evaporation. Evaporation is an endothermic process as it uses the energy from the atmosphere to raise its temperature and break bonds in the liquid state and convert to the gaseous state which has a relatively lower number of bonds.
When water condensed in the environment it does so on the surface that the environment provides it, be it structures or dust particles
When water particles condense on dust particles present in the air mist is formed. Mist is the phenomenon caused by the suspension of small drops of water present in the air.
The formation of mist is generally seen in cold weather or a steamed room.

So, the correct answer is Option A .

Note: The presence of fog, mist, frost in the atmosphere also affects the visual effect of the atmosphere causing effects ranging from decreased visibility, precipitation of water drops in the atmosphere, accumulation of water on surfaces that are present in open.
The occurrence of a specific phenomenon is based on the environmental conditions and the surface which is present. Sometimes the result of these phenomena is a colloidal solution that remains suspended in the environment.