Which of the following is the correct order of particle sizes?

Correct option is A

The correct answer is option (A) True solution < Colloidal solution < Suspension.

Explanation

The correct order of particle sizes in different types of mixtures is:

• True solution: Particles are very small (less than 1 nm) and cannot be seen with the naked eye.

• Colloidal solution: Particles are larger than those in true solutions but still small enough to remain suspended in the solution (1 nm to 1000 nm).

• Suspension: Particles are large enough to be seen with the naked eye (greater than 1000 nm) and will eventually settle out of the solution.

Thus, the correct order is True solution < Colloidal solution < Suspension.

Information Booster

• True solutions consist of molecules or ions that are too small to scatter light (no Tyndall effect).

• Colloidal solutions have particles that scatter light, creating the Tyndall effect but are still not visible to the naked eye.

• Suspensions are mixtures where large particles can scatter light and be seen with the naked eye.