Question

Milk is a:

• A. True solution
• B. Colloidal solution
• C. Suspension
• D. Saturated solution

Hint:

Milk is a colloidal solution, where fat droplets are suspended in water, and it shows the Tyndall effect.

Answer 1

The Correct Option is B

Milk is best described as a colloidal solution. This classification arises from its composition and properties:

• A colloid is a mixture where one substance of microscopically dispersed insoluble particles is suspended throughout another substance.
• In milk, fine particles of fat and protein are dispersed in water, rendering it a colloidal system.
• Unlike true solutions, the particles in colloids are larger and do not settle out upon standing, nor are they easily filtered.
• Colloids exhibit the Tyndall effect, which is the scattering of light, another characteristic feature observed in milk.

Therefore, based on these observations and properties, milk is classified as a colloidal solution.

Answer 2

Milk is being classified here. Test each option against how milk actually behaves when you shine a light through it or let it stand.

1. True solution: a true solution stays perfectly clear and never scatters a light beam. Milk looks opaque and white, not clear, so this does not fit.
2. Colloidal solution: milk scatters light strongly, which is why a flashlight beam is visible when it passes through diluted milk, and it does not separate into layers on ordinary standing. This is the Tyndall effect, a defining sign of a colloid, and it matches milk.
3. Suspension: a suspension settles into layers over time. Homogenized milk does not settle out under normal conditions the way a suspension would.
4. Saturated solution: this label is about how much solute is dissolved relative to a limit, which does not describe the fat and protein particles dispersed in milk.

Milk scatters light and stays evenly mixed without settling, both classic signs of a colloid.

So the correct answer is colloidal solution.