Multiple choice

Curdling of milk is an example of:

  1. emulsification

  2. coagulation

  3. stabilization

  4. demulsification
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coagulation is the process by which a colloid precipitates out of a solution. The precipitation is brought about by induced aggregation. Milk is a colloidal suspension in which the particles are prevented from aggregating because they have electric charges of the same sign. When milk sugar (lactose) ferments, ions responsible for curdling are formed.

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