In a mixture of H – He + gas (He + is singly ionized He atom), H atoms and He + ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to He + ions (by collisions). Assume that the Bohr model of atom is exactly valid. The quantum number n of the state finally populated in He + ions is :
Text Solution
Verified by ExpertsThe correct answer is:
C
Energy released by H atom. Let 
go to nth state.
So energy required
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