NCERT Solutions for Class 6 Science Chapter 15
Important NCERT Questions
Class 6th Chapter 15 Air Around Us
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 5
Why does a lump of cotton wool shrink in water?
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Cotton wool shrinks in water as air trapped within its fibers escapes when wet. The expulsion of trapped air between fibers causes compression, leading to the cotton shrinking in size when it absorbs water.
Sufficient volume of air is present in the cotton wool. When dipped in water, this air is replaced by less volume of water, so it shrinks.
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