(A) Increases
(B) Remains same
(C) Decreases
(D) becomes infinite
Tag: Physics Mcq Questions and Answers
A hydrogen atom makes a transition from 3rd excited state to 1st excited state, the energy of the photon emitted is:
(A) 12.75 eV
(B) 2.55 eV
(C) 12.08 eV
(D) 1.51 eV
Which series of hydrogen atom was first discovered?
(A) Lyman
(B) Brackett
(C) Balmer
(D) Pfund
The energies required in electron volt to remove an electron from three lowest orbits of hydrogen atom are:
(A) 13.6, 3.4, 1.5
(B) 13.6, 6.8, 3.7
(C) 13.6, 10.2, 3.4
(D) 13.6, 9.5, 4.3
A stream of electrons accelerated from rest through a petunia difference of 12.75 V is bombarded on monoatomic hydrogen gas. In the emission spectrum one cannot observe any line of:
(A) Lyman series
(B) Balmer series
(C) Paschen series
(D) Pfund series
Which of the following correctly represents the ground state and all the possible excited states for paschen series of the hydrogen atom?
(A) n = 1, n = 2, to ∞
(B) n = 3, n = 4, to ∞
(C) n = 2, n = 3, to ∞
(D) n = 4, n = 5, to ∞
Infrared region (to which three spectral series of the hydrogen spectrum belong) lies between:
(A) Radio waves and microwaves
(B) Visible region and ultraviolet region
(C) Microwaves and visible region
(D) Ultraviolet region and X-rays
Hydrogen atom can give spectral lines in the series named as Lyman, Pfund, Bracket, Balmer and Panchen. Which of the following is correct?
(A) Paschen Series is in visible region
(B) Bracket series is in infrared region
(C) Pfund series is in ultraviolet region
(D) Balmer series is in X-rays region