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JEE Main Chemistry question

ChemistryStructure of AtomJEE Main

Two samples are taken containing species H and Li in some excited state. After spectrum analysis, it was found that the total number of lines observed in Balmer series is 2 for H atom and that is 1 in Pfund series for Li ion. The electrons of H sample transit to lower state from its excited state, and then the photon of maximum energy is used to further excite the already excited Li sample. What is the maximum possible excitation level (orbit no.) of electron for Li ion?

Answer: 12

Solution

2 Balmer lines for H means the electron started from (transitions both land in Balmer series); the photon of maximum energy from this de-excitation is the transition: eV. 1 Pfund line for Li (, Pfund series has

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Question ID VK-133023