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Question

In Bohr series of lines of hydrogen spectrum, the emission of a line from the red end corresponds to which one of the following inner-orbit jump of the electron in a hydrogen atom?

A
32
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B
52
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C
41
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D
25
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Solution

The correct option is B 52
In H-spectrum coloured radiation means visible region (Balmer series) (nfinal=2). This is the only criteria. Doesn't matter where the electron starts from. Also, since coloured light is emitted, the final n value should be lower than the initial value.

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