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QJEEM21Phfe8d: JEE Main 2021 Physics - Class 12 JEEM21Phfe8d Solution: In the given figure, the energy levels of hydrogen atom have…

In the given figure, the energy levels of hydrogen atom have been shown along with some transitions marked A, B, C, D and E.

The transitions A, B and C respectively represent :

JEE Main 2021 (Online) 24th February Morning Shift Physics - Atoms and Nuclei Question 164 English

Multiple Choice Options

  • A The series limit of Lyman series, second member of Balmer series and second member of Paschen series.
  • B The ionization potential of hydrogen, second member of Balmer series and third member of Paschen series.
  • C The series limit of Lyman series, third member of Balmer series and second member of Paschen series.
  • D The first member of the Lyman series, third member of Balmer series and second member of Paschen series.

Step-by-Step Verified Solution

In transition A, hydrogen atom comes from higher energy state n = ∞ to lower energy state n = 1. Hence, transition A represents series limit of Lyman series. In transition B, hydrogen atom comes from higher energy state n = 5 to lower energy state n = 2. Hence, transition B represents 3rd line of Balmer series. In transition C, hydrogen atom comes from higher energy state n = 5 to lower energy state n = 3. Hence, transition C represents 2nd line of Paschen series.

Hence, option (c) is correct.

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