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In a mixture of H-He^(+) gas (He^(+) is ...

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 :

A

2

B

3

C

4

D

5

Text Solution

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The correct Answer is:
C
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