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For a given rise in temperature, which state of matter shows the greatest thermal expansion?
AGases
BLiquids
CSolids
DAll expand equally
Answer & Solution
Correct answer: A. Gases
1. Expansion depends on how freely particles move apart on heating.
2. Solids expand least because of their rigid structure.
3. Liquids expand more than solids, and gases expand the most of the three.
4. So gases show the greatest expansion; equal expansion is incorrect.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 3 Thermal Physics "Expansion in Liquids and Gases", p.42_
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