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Though the velocity of air molecules is ...

Though the velocity of air molecules is nearly `0.5 km//s`, yet the smell of scent spreads at a much slower rate. Why ?

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This is because, air molecules travel along a zig zag path, undergoing frequent collisions with other air molecules. Therefore, their displacement per unit time is very small.
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PRADEEP-BEHAVIOUR OF PERFECT GAS & KINETIC THEORY-Conceptual Problems
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  8. A gas is filled in a cylinder fitted with a piston at a definite tempe...

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  10. Explain the phenomenon of evaporation on the basis of kinetic theory.

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  11. Why cooling is caused by evaporation?

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  12. The rms speed of oxygen molecules at a certain temperature T is v. If ...

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  13. A vessel of volume 4 litres contains a mixture of 8 grams of O(2), 14 ...

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  14. Why temperature less than OK is not possible ?

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  16. How can the number of molecular collisions per unit time in a gas be i...

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  17. On which factors does the average KE of gas molecules depend : nature ...

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  18. What happens when a compressed gas pushes a piston out and expands ?

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  19. Though the velocity of air molecules is nearly 0.5 km//s, yet the smel...

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  20. There are N molecules of a gas in a containter. If this number is incr...

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