Solution, colloids and suspension are distinctive sort of mixtures.
Air and dust are not solutions.
There is an uncertainty about whether air and dust form a colloid or a suspension.
Colloids don't partitioned, while suspension's segments do isolated. In the event that the residue is sufficiently little it will stay in air sufficiently long to be considered a colloid for all efects.
At that point, the most satisfactory assessment is that the blend of air and dust is a colloid.
So, option c. a colloid is the answer.
Colloid is a heterogeneous mixture in which molecule estimate is middle of genuine arrangement and suspension. Smoke from a fire is case of colloidal framework in which small particles of strong buoy in air. Some basic cases of colloids are jewel stones, smoke, cheddar, drain, cleanser foam and froth.
