JEE Main 2019ChemistryStructure of AtomMediumMCQ

JEE Main 2019Structure of Atom Question with Solution

JEE Main 2019 (10 Apr Shift 2)

Question

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are:

Choose an option

Show full solutionCorrect option: C
Correct answer
CLyman and Paschen

Step-by-step explanation

1λ2=RH1n12-1n221λ1=RH1m12-1m22

As for shortest wavelengths,  n2 and m2 is 
  λ1λ2=91=m12n12

Now if m1=3 and n1=1 it will justify the statement hence Lyman and Paschen B is correct.

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About this question

This is a previous-year question from JEE Main 2019, covering the Structure of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.