Question

Match the following mixture with the size of their constituent particles.

• A. <1 nm
• B. 1nm- 1000nm
• C. >1000nm

Answer 1

Based on particle size, homogenous mixtures are divided into three types.

Solutions- particle size <1 nm, with examples being salt solution, sugar solution.

Colloids- particle size lies between 1nm and 1000 nm and they display properties such as tyndall effect, brownian motion etc. Eg- Paints, varnishes, dust in the air, etc.

Suspensions- particle size is greater than 1000 nm. Here, the particles settle down on standing after sometime and can also be separated using a filter paper. Eg- Mud suspension, milk, blood, etc.