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Electron Distribution in Different Orbits

In a sample o...

Question

In a sample of hydrogen atoms, electrons are de-excited from the 4th excited state to the ground state. Which is/are correct statement(s)?

A

No line is observed in Pfund series

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B

A total of ten lines are observed in the spectrum

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C

Four lines in the UV region and three lines in the visible region are observed

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D

One line is observed in the Brackett series

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Solution

The correct option is D One line is observed in the Brackett series

4th excited state belongs to $n = 5$ . Pfund series observerd for transition from $n = 6, 7 . . .$ to $n = 5$ .

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