Question

A pale blue tinge in milk is due to

• A. Coagulation
• B. Tyndall effect
• C. Brownian movement of fat particles
• D. the ability of absorption of blue light by the fat particles

Answer 1

The correct option is B

Tyndall effect

Explanation for the correct option:

• A bluish tinge appears when light is passed through water containing a few droplets of milk.
• This is due to the Tyndall effect, which is caused by light scattering by milk. From this, we can say that Milk is a colloidal solution.
• The Tyndall effect is the phenomenon in which the particles in a colloid scatter light beams aimed at them.
• All colloidal fluids and some very fine suspensions exhibit this effect.
• When light passes through a colloid, the colloidal particles in the solution prevent the beam from passing entirely through.
• Light is dispersed when it collides with colloidal particles.
• The path of the light beam is apparent due to this dispersion.

Therefore, the correct option is (B).