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Question
Helium atom is two times heavier than a hydrogen molecule at 298 K, the average kinetic energy of helium is
 
Options:
A .  Two times that of a hydrogen molecule
B .  Same as that of a hydrogen molecule
C .  Four times that of a hydrogen molecule
D .  Half that of a hydrogen molecule
Answer: Option B
:
B
EHeEH2=THeTH2 so energies will be same for
He & H2 at same temperature.

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