⇦ | ⇨ |
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 wave described by y = 0.25 sin (10 2πx – 2πt), where x and y are in meters
- The ratio of the numerical value of the average velocity and average speed
- A certain current on passing through a galvanometer produces a deflection
- Three solids of masses m₁,m₂ and m₃ are connected with weightless string
- Two balls of mass m₁ and m₂ are separated from each other by powder charge
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The wave described by y = 0.25 sin (10 2πx – 2πt), where x and y are in meters
- The ratio of the numerical value of the average velocity and average speed
- A certain current on passing through a galvanometer produces a deflection
- Three solids of masses m₁,m₂ and m₃ are connected with weightless string
- Two balls of mass m₁ and m₂ are separated from each other by powder charge
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