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Gas molecules are described as being in incessant motion that is:
ARadial
BRotary
CRegular
DRandom
Answer & Solution
Correct answer: D. Random
1. No direction is preferred inside a gas at rest.
2. The motion has no pattern to it.
3. Molecules of a gas are in incessant random motion, colliding with one another and the walls.
4. So the answer is random.
_Source: NCERT Class XI Physics Part II, Ch 12 'Kinetic Theory'_
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