Q. Which of the following is/are the characteristics of colloid?

1. A colloid is a heterogeneous mixture.
2. Colloids are big enough to scatter a beam of light.
3. The particles of a colloid can be seen by the naked eye.

Select the correct answer from the codes given below:
Answer: Only 1 and 2
Notes: A colloid is a heterogeneous mixture. The size of particles of a colloid is too small to be individually seen by naked eyes. Colloids are big enough to scatter a beam of light passing through it and make its path visible. They do not settle down when left undisturbed, that is, a colloid is quite stable.