| ⇦ | 
| ⇨ |
Hydrogen atom in ground state is excited by a monochrmatic radiation of λ=975 Å. Number of spectral lines in the resulting spectrum emitted will be
Options
(a) 3
(b) 2
(c) 6
(d) 10
Correct Answer:
6
Explanation:
For the λ=975 Å
1 / λ = R [(1/n₁²) – (1/n₂²)]
where R is the Rydberg constant
Solving we get n₂ = n = 4 (Since, n₁ = 1 ground state)
Therefore number of spectral lines = n(n – 1) / 2 = 4(4 – 1) / 2 = 6.
Related Questions: - When a ceiling fan is switched off its angular velocity reduces to 50% while
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
- In an LCR circuit, capacitance is changed from C to 2C. For the resonant frequency
- If R is the radius of earth, the height at which the weight of a body 1/4 of its weight
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When a ceiling fan is switched off its angular velocity reduces to 50% while
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
- In an LCR circuit, capacitance is changed from C to 2C. For the resonant frequency
- If R is the radius of earth, the height at which the weight of a body 1/4 of its weight
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
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