Chemistry - Atomic Structure Question with Solution | TestHub
ChemistryAtomic StructureSpectrumMedium2 minQB
ChemistryMediumsingle choice
In a sample of hydrogen atoms, all the atoms are in the 4th excited state. If they de-excite to the ground state, the ratio of the longest and the shortest wavelengths of emitted photons is
Options:
Answer:
B
Solution:
4th excited state is n = 5.
Longest wavelength: 5 → 4. Shortest wavelength: 5 → 1.
λ_longest/λ_shortest = = (24/25)/(9/400) = 24 × 400/(25 × 9) = 128/3.
Answer: (B).
Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Spectrum
⏱ 2mℹ️ Source: QB
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