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Question

In H-atom, electron transits from 6th orbit to 2nd orbit in multi step, then total spectral lines (without Balmer series) will be:

A
6
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B
10
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C
4
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D
0
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Solution

The correct option is A 6
n2=6;n1=2

n2n1=4

Total spectral lines possible =(n2n1)[(n2n1)+1]2

=4×52=10

No. of Balmer lines possible

62;52;42;32;

Total 4 Balmer lines arfe possible for the given transaction

Expacted spectral line= Total spectral lines possible - No. of Balmer lines possible
= 104 = 6
Hence, the correct option is 6.

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