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Questions  

Kinetic theory of ideal gases can be used to predict

a
Speed of a car
b
RMS speed of free electrons in a metal at normal temperatures
c
RMS speed of gas molecules in high-pressurized chambers
d
RMS speed of molecules of Helium gas just above its melting point

detailed solution

Correct option is B

Low pressure and high temperature conditions are required for ideal gas behaviour.  This is satisfied by free  electrons.

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