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PHYSICS [3 Mark Question Answer]

Matter · ICSE STD 8 (ICSE - English Medium). 2 questions.

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[3 Mark Question Answer]

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2 questions · timed · auto-graded

Question 13 Marks
How can you explain the process of freezing, using kinetic theory of matter ?
Answer
When the temperature of a liquid is decreased, its molecules lose energy and slow down. So, the intermolecular forces of attraction between them increase, and they come close to each other. With continued cooling $($during freezing$)$, the intermolecular spaces decrease to such an extent that the liquid changes into its solid state.
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Question 23 Marks
Differentiate between atoms and molecules.
Answer
Atom :
An atom is the smallest unit of element.
It may or may not have an independent existence.
Molecule :
A molecule is the smallest unit of matter.
It has an independent existence.
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[3 Mark Question Answer] - PHYSICS STD 8 Questions - Vidyadip