*Gases contain a large no. of small particles
*There is no intermolecular force of attraction b/w d molecules at ordinary temp. n pressure
*Particles move in a straight line
*Collisions b/w molecules are perfectly elastic

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The Kinetic Theory of Gases states that:
1.They have maximum intermolecular spaces.
2.They have very weak intermolecular force of attraction.
3.They are in continuous random motion.