Question

Mists are produced by:
A.Smoke formed during combustion of organic matter
B.Particles of spray liquids and by condensation of vapours in air
C.Fine solid particles produced during crushing and grinding
D.Condensation of vapours during chemical reactions.

Answer 1

Hint: Mist is a very dense water vapor, almost as thick as fog. As a verb, mist means "to cover with mist," so you might mist your dry plants or watch your windows mist up in the rain. Mist can also refer to a general dimness or cloudiness.

Complete answer:
Mist is a phenomenon caused by small droplets of water suspended in air. Physically, it is an example of a dispersion. It is most commonly seen where warm, moist air meets sudden cooling, such as in exhaled air in the winter.
Mist often forms when warm air over water suddenly encounters the cooler surface of land. Mist is tiny droplets of water hanging in the air. These droplets form when warmer water in the air is rapidly cooled, causing it to change from invisible gas to tiny visible water droplets. The formation of mist, as of other suspensions, is greatly aided by the presence of nucleation sites on which the suspended water phase can congeal.
Mist makes a light beam visible from the side via refraction and scattering on the suspended water droplets. Mist usually occurs near the shores and is often associated with fog. Mist can be as high as mountain tops when extreme temperatures are low.
So, the correct answer is B) Particles of spray liquids and by condensation of vapours in air.

Note:
Mist is commonly mistaken for fog, which resembles a stratus cloud lying at ground level. These two phenomena differ, yet share some common things. Similar processes form fog and mist. Fog is denser and generally lasts longer, but mist is thinner and more transparent.