Question

Explain colloid with examples? [3 MARKS]

Answer 1

Explanation : 2 Marks
Any two examples : 0.5 Mark each

Explanation:
i. A colloid is an intermediate between suspension and solution. A homogenous-looking heterogeneous mixture in which particles have size between 1 nm to 100nm (1 nm = ${10}^{-9}$ m) and are dispersed in a continuous medium is called a colloid.

ii. A Colloidal solution is also called a sol. The continuous medium in a sol is called the dispersion medium and the particles form the dispersed phase or colloidal particles.

Example of colloids:
milk, blood, toothpaste, jelly, fog, cloud, etc.