NEET/CBSE Mock Test: Nature of Matter

Nature of Matter Quiz

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NEET Level

Q1. At what temperature does the kinetic energy of particles in water theoretically become zero?

Explanation: Absolute zero (0 Kelvin or -273.15°C) is the temperature at which all molecular motion stops.
Assertion-Reasoning

Q2.
Assertion (A): Solids have a definite shape.
Reason (R): Particles in a solid have no freedom of movement and are held in an orderly fashion.

Explanation: Because the particles are locked in place, solids cannot flow and maintain their rigid shape.
CBSE 3 Marks

Q3. Why do gases completely fill the container in which they are placed?

Model Answer: In gases, the particles are very far apart and have easy, fast movement. The attractive forces between them are negligible, allowing them to spread out and occupy all available space.

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