Question

Tyndall effect is observed in

Answer 1

Tyndall effect is the scattering of light by the particles in a mixture. For examples- Colloids show Tyndal effect since their particles scatter the beam of light.
Solutions do not show Tyndal effect since their particles do not scatter the beam of light.
Orange juice and black coffee are solutions. Therefore, they do not show Tyndall effect. Whereas, milk is a colloid. Thus, it shows Tyndall effect.