| ⇦ | 
| ⇨ |
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 alternating voltage e=200s in100t is applied to a series combination
- A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection
- Two cells, having the same e.m.f. are connected in series through an external resistance
- A cord is wound round the circumference of wheel of radius
- The weight of a body on surface of earth is 12.6 N. When it is raised to a height
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An alternating voltage e=200s in100t is applied to a series combination
- A galvanometer has a coil of resistance 100 ohm and gives a full-scale deflection
- Two cells, having the same e.m.f. are connected in series through an external resistance
- A cord is wound round the circumference of wheel of radius
- The weight of a body on surface of earth is 12.6 N. When it is raised to a height
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