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In a H- like sample electron makes trans...

In a H- like sample electron makes transition from 4th excited state of 2nd state then:

A

10 different spectral lines are observed

B

6 different spectral lines are observed

C

Number of lines belonging to the balmer series is 3

D

Number of lines belonging to the balmer series is 2

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The correct Answer is:
B,C,D
Transition is taking place from `5to2`
`implies Deltan=3`
Hence maximum number of spectral line observed`=(3(3+1))/2=6`
( C)number of lines belonging to the balmer series =3
( D)Also we can see that number of lines belonging to paschen series=2
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