Question

Identify the correct statement(s) with respect to a suspension and a colloidal solution:

• A. In a suspension, the particles cannot be seen by the naked eye whereas in a colloidal solution, they can be.
• B. In a suspension, the particles can be seen by the naked eye whereas in a colloidal solution, they cannot be.
• C. Both can scatter light and make its path visible.
• D. A suspension can scatter light but a colloidal solution cannot.

Answer 1

Answer: (B), (C)

Both can scatter light and make its path visible.

A suspension is prepared by mixing an insoluble solid in a liquid. The solid particles do not dissolve and are visible to the naked eye. They scatter a beam of light passing through it and make the path of the light visible.

A colloidal solution is a mixture in which the size of the particles is too small to be seen by the naked eye. But the size of the particles in a colloid is big enough to scatter light passing it through and make the path of the light visible.