Questions
A certain transition in H spectrum from an excited state to ground state in one or more steps gives rise to total 10 lines. How many of these belong to uv spectrum?
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Correct option is B
Number of spectral lines when electronic transition from higher energy level to ground state =10
n2-n =20
n2-n -20 =0
n2 -5n +4n -20=0
(n-5) (n+4) =0
So n=5
For uv spectrum line has to come form higher level to n = 1
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