The splitting up of spectral lines under the influence of magnetic field is known as
(a) Stark effect
(b) Photoelectric effect
(c) Zeeman effect
(d) Electromagnetic effect
Chemistry MCQs
The wavelength of light waves in inversely proportional to its
(a) radius
(b) energy
(c) velocity
(d) quantum number
The first use of quantum theory to explain the structure of atom, was given by
(a) Bohr
(b) Planck
(c) Einstien
(d) Heisenberg
The maximum energy is possessed by an electron, when it is present
(a) in nucleus
(b) in ground energy state
(c) in first excited state
(d) at infinite distance from the nucleus
The energy of a hydrogen atom in its ground state is – 13.6 eV. The energy of the level corresponding to the energy level equal to 5 is
(a) – 0.54 eV
(b) – 0.85 eV
(c) – 2.72 eV
(d) – 5.40 eV
The most probable radius (in pm) for finding the electron in He+ is
(a) 0.0
(b) 26.5
(c) 52.9
(d) 105.8
When electrons of hydrogen atom return to L-shell from the shells of higher energy, we get a series of lines in the spectrum. This series is called
(a) Lyman series
(b) Blamer series
(c) Brackett series
(d) Paschen series
Our sun belongs to which of the following spectra?
(a) O
(b) B
(c) F
(d) G
The Bohr’s theory was modified to give the concept of elliptical by
(a) Hund
(b) Davison
(c) Rutherford
(d) Sommerfeld
According to Bohr’s theory of hydrogen atom, which of the following is quantised for an electron?
(a) velocity
(b) acceleration
(c) angular momentum
(d) angular acceleration