| ⇦ | 
| ⇨ |
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: - A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
- A body of length 1 m having cross-sectional area 0.75 m² has heat flow through it
- The conducting loop in the form of a circle is placed in a uniform magneitc field
- A body starts from rest, what is the ratio of the distance travelled by the body
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
- A body of length 1 m having cross-sectional area 0.75 m² has heat flow through it
- The conducting loop in the form of a circle is placed in a uniform magneitc field
- A body starts from rest, what is the ratio of the distance travelled by the body
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