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

In a mixture of `H- He^(+)` gas (`He+ `is singly ionized He atom), `H` atom and `He+` ions are excited to their respective first excited state. 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^(+)` inos is -

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts


Energy given by H atom in transition from `n = 2 to n = 1` is equal to energy taken by `He^(+)` atom in transition from `n = 2 to n = 4`.
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