| ⇦ | 
| ⇨ |
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: - An object is placed at a distance of 10 cm from a co-axial combination of two lenses
- Photoelectric current from a given photocell will depend upon
- An interference pattern was made by using red light. If the red light
- By sucking through a straw, a student can reduce the pressure of his lungs
- A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An object is placed at a distance of 10 cm from a co-axial combination of two lenses
- Photoelectric current from a given photocell will depend upon
- An interference pattern was made by using red light. If the red light
- By sucking through a straw, a student can reduce the pressure of his lungs
- A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m
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