| ⇦ | 
| ⇨ |
The wavelength of the first line of Lyman series for hydrogen atom is equal to that of the second line of Balmer series for a hydrogen like ion. The atomic number Z of hydrogen like ion is
Options
(a) 3
(b) 4
(c) 1
(d) 2
Correct Answer:
2
Explanation:
For first line of Lyman series of hydrogen
hc/λ₁ = Rhc (1/1² – 1/2²)
For second line of Balmer series of hydrogen like on
hc/λ₂ = Z²Rhc (1/2² – 1/4²)
By eq. λ₁ = λ₂
(1/1 – 1/2) = Z² (1/4 – 1/16) or Z = 2
Related Questions: - The fluctuation in the input voltage of 200 V to a domestic circuit is +10V
- A uniform force of (3i+j) Nacts on a particle of mass 2 kg.Hence the particle is displaced
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
- A stone is tied to a string of length l and whirled in a vertical circle with the other end
- The mirrors are inclined at an angle of 50⁰. The number of images formed for an object
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The fluctuation in the input voltage of 200 V to a domestic circuit is +10V
- A uniform force of (3i+j) Nacts on a particle of mass 2 kg.Hence the particle is displaced
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
- A stone is tied to a string of length l and whirled in a vertical circle with the other end
- The mirrors are inclined at an angle of 50⁰. The number of images formed for an object
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply