Q.

What is the maximum number of emission lines when the excited electron of a H-atom in n = 6 drops to the ground state?

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a

10

b

20

c

15

d

18

answer is C.

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Detailed Solution

Number of lines produced when electron from nth shell drops to ground state = n(n-1)2When n = 6,number of lines produced = 6(6-1)2=6×52=15
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