Question

Smoke rising from chimneys is example of

• A. Thermionic radiation
• B. Heating of molecules in a substance
• C. Motion of molecules in a substance
• D. Heat radiation

Answer 1

Answer: (C)

Motion of molecules in a substance

Due to diffusion, smoke molecules leave the chimney and spreads in the atmosphere.Overall a diffusion process is seen in it as smoke particles diffuse into air particles.