Which of the following is not an aerosol? A. Mud B. Dust C. Smoke D. Fog

Mud
Dust
Smoke
Fog

The correct answer

is A. Mud.

An aerosol is a suspension of fine solid particles or liquid droplets in a gas. Mud is a mixture of water and soil, and it is not a suspension of fine solid particles or liquid droplets in a gas.

Dust is a fine powder consisting of tiny solid particles. Smoke is a visible suspension of carbon and other particles in air, often from burning. Fog is a cloud of water droplets suspended in the atmosphere at or near the Earth’s surface.