Which of the following is not a colloid?

Correct option is C

The correct answer is (c) Ghee

Explanation:
• Ghee (clarified butter) is technically not a colloid; it is almost 100% pure butterfat separated entirely from water and milk solids.
• Since it lacks a dispersed phase dispersed strictly within a distinct continuous dispersion medium, it does not fit the chemical definition of a colloidal system.

Information Booster:
• A colloid uniquely consists of microscopic particles suspended smoothly throughout another substance, and they uniquely scatter light (Tyndall effect).
• Ghee is merely a homogeneous continuous lipid phase.

Additional Knowledge:
Milk (Option a)
• Milk is definitively a colloid (specifically an emulsion), consisting of liquid fat globules stably suspended inside liquid water.
Blood (Option b)
• Blood is a complex biological colloid (a sol), where red blood cells and massive protein molecules are heavily suspended in blood plasma.
Butter (Option d)
• Butter is fundamentally a water-in-oil emulsion (colloid), where tiny water droplets strictly remain dispersed within continuous fat.
None of the above/More than one of the above (Option e)
• Incorrect, as Ghee accurately qualifies as the non-colloid exception.

So the correct answer is (c)