(A) 3.4 eV
(B) 13.6 eV
(C) 10.2 eV
(D) 1.51 ev
Tag: Physics Mcq
Every series of Hydrogen Spectrum has an upper & lower limit in wavelength. The Spectral series which has an upper limit of wavelength equal to 18750 A degree is:
(A) Lyman series
(B) Balmer series
(C) Pfund series
(D) Paschen series
The energy of an electron:
(A) is greater in outer orbit than I inner orbit
(B) Is always the same whichever the orbit may be
(C) Decreases as the quantum number increases
(D) is greater in inner orbits than in outer orbits
The minimum wavelength of the Lyman series for the Hydrogen atom is given by:
(A) 4 / R
(B) 9 / R
(C) 16 / R
(D) 1 / R
According to Bohr’s Model of Hydrogen atom:
(A) The linear velocity of electrons is quantized
(B) The total linear momentum of electrons is quantized
(C) The angular momentum of electrons is quantized
(D) The angular velocity of electrons is quantized
Band spectrum is produced by:
(A) He
(B) H
(C) H2
(D) Na
When a hydrogen atom is raised from ground state to an excited state:
(A) P.E increases and K.E decreases
(B) Both K.E and P.E increases
(C) P.E decreases and K.E increases
(D) Both K.E and P.E decreases
The energy of the ground electronic state of hydrogen atom is -13.6 eV. The energy of 2nd excited state is:
(A) – 3.40 eV
(B) – 0.85 eV
(C) – 1.51 eV
(D) – 0.54 eV