Question

Glycerol is added to soap. It functions ___.

• A. as a filler.
• B. to increase lathering.
• C. to prevent rapid drying.
• D. to make soap granules.

Answer 1

The correct option is C to prevent rapid drying.

The purpose of adding glycerol to soap

Glycerol is a humectant (a substance that attracts water).
When glycerol is added to soap, it absorbs water from the air and draws moisture to the skin.
Glycerol can retain moisture. Hence, glycerol is added to soap to prevent rapid drying.

So, option (C) is the correct answer.