1.

The ratio of the energies of the hydrogen atom in its first to second excited state isA. `1//4`B. `4//9`C. `9//4`D. `4`

Answer» Correct Answer - C
First excited state i.e., second orbit `(n = 2)`
Second excited state i.e., third orbit `(n = 3)`
`:. E = -(13.6)/(n^(2)) rArr (E_(2))/(E_(3)) = ((3)/(2))^(2) = (9)/(4)`


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