Q.

Which  of the following  series of lines  are the only lines  in hydrogen spectrum  which appear in the visible region?

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a

Brackett

b

Balmer

c

Paschen

d

 Lyman

answer is B.

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Detailed Solution

In Lyman series, the series of lines are in the Ultraviolet region 
In Balmer series, the series of lines are in the Visible region 
The series of lines in Paschen and Brackett series lies in an Infrared region In Balmer series, the lines appear in visible region.

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