Q. Which of the following is/ are examples of colloids?

1. Whipped ice-cream
2. Fruit jellies
3. Milk
4. Cake
5. Eggs

Select the correct option from the codes given below:
Answer: Only 1, 2, 3 & 5
Notes: A colloid is a heterogeneous mixture of two substances of different phases. Shaving cream and other foams are gas dispersed in liquid. Jelli, toothpaste, and other gels are liquid dispersed in solid. Dough is a solid dispersed in a liquid. Smoke is a solid dispersed in a gas. A colloidal system, which has liquid as the dispersed phase and solid as the dispersion medium is known as gel. Mixture in which the dispersed phase (relatively large particles) is distributed throughout a dispersing medium or a continuous phase (a solvent like medium) is called a colloid. Electrophoresis helps in determining the sign of the electric charge on the colloidal particles.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.