JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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In a sample of hydrogen atoms, all the atoms are in a particular excited state. If the emission spectrum of this sample has only 4 spectral lines in the visible region, then the total number of spectral lines in IR region possible from that state is

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Correct option: A

Option A (6) is correct because if there are 4 spectral lines in the visible region ending at n=2, then the initial state is n=6. The number of IR lines (transitions to n>2) can then be calculated.

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