Question

A piece of pumice stone is used for scrubbing dirt from hands and feet. Pumice is a colloidal solution of a:

• A. liquid in a solid
• B. solid in a liquid
• C. solid in a solid
• D. gas in a solid

Answer 1

The correct option is D gas in a solid

Pumice is a colloidal solution of the gas in a solid in which dispersed medium is solid and the dispersed phase is gas.

Hence option $D$ is correct.