Which among the following chemicals is used for control of humidity ?

The correct answer is Option (2) → Silica gel

Silica gel is a porous, highly adsorbent form of silica. It adsorbs water vapour from the air on its large surface, which is why it is used to control humidity: small packets of it keep medicines, food and electronic goods dry.

Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.

NCERT (Pre-rationalised edition, 2022-23):
Applications of Adsorption – …