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In H spectrum electron moves from 5th orbit to 2nd orbit in multi step then total number of lines in infrared region and ultravoilet region respectively are : 1) 3,0 2) 3,1 3) 5,0 4) 4,0

In H spectrum electron moves from 5th orbit to 2nd orbit in multi step then total number of lines in infrared region and ultravoilet region respectively are : 
1) 3,0
2) 3,1
3) 5,0
4) 4,0

Grade:12th pass

1 Answers

Pooja
askIITians Faculty 477 Points
5 years ago
Dear student,
In H spectrum, the infrared line is when the electron dropped to 3rd orbital so from 5th to 3rd is possible via three way 5 to 4 and then 4 to 5 or directly 5 to 3.
For ultraviolet region the electron is dropped to first orbital
which is not possible in the given question.
Therefore, the answer is 1)

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