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Question

The frequency of the first line in Lyman series in the hydrogen spectrum is v. What is the frequency of the corresponding line in the spectrum of doubly ionized Lithium?

A
v
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B
3v
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C
9v
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D
27v
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Solution

The correct option is C 9v
We know that, frequency, vZ2
For a doubly ionized lithium, Z = 3
Frequency of the corresponding line in the spectrum of doubly ionized Lithium, v=32v=9v
Hence, the correct choice is (c).

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