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Q.

Select the correct statement (s).

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a

Kinetic energy is zero at OoC

b

rms velocity of O2 at 27∘C is =3×8.314×30032ms−1

c

Distribution of molecules is very small when u→0 or u→∞

d

All the above statements are correct

answer is C.

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Detailed Solution

(a) KE=32nRT=32nR(0+273)=32nR×273Thus, (a) is incorrect. (b) rmsO2=3RTM=3×8.3143×30032×10−3 Thus, (b) is incorrect (molar mass of O2 in SI unit is 32×10−3kgmol−1(c) is correct

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