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What is the correct increasing order of freedom of particle motion?

Answer and explanation

Correct answer: Solid liquid gas

Direct answer: B, solid, liquid, gas. Freedom of particle motion means how freely particles can move from place to place. In a solid, particles are packed closely and mainly vibrate about fixed positions, so their freedom is lowest. In a liquid, particles remain close but can slide past one another, so freedom is greater. In a gas, particles are far apart and move rapidly in many directions, so freedom is greatest. Therefore the increasing order is solid < liquid < gas, which is option B. Option A gives gas, liquid, solid, the reverse order, so it is decreasing rather than increasing. Option C puts liquid before solid, although liquid particles move more freely than solid particles. Option D puts gas before liquid and is also not the correct increasing order. Memory cue: more space and weaker attraction mean more freedom; solid → liquid → gas.

Related tags

ChemistryNature-Of-MatterClass-11

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