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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`

Answer» Correct Answer - C
`DeltaE_(He)=13.6xx4(1/4-1/n^(2))eV,DeltaE_(He)=DeltaE(H)`


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