The shortest wavelength of Balmer series is about
1. 912
2. 121
3. 3648
4. 4864
Which of the following transition in a hydrogen atom will produce radiations of minimum wavelength?
1. n = 2 to n = 1
2. n = 5 to n = 3
3. n = 10 to n = 5
4. n = 10 to n = 3
The frequency Of radiation emitted during the transition of an electron from a second excited state to a first excited state in H-atom is The frequency of the same transition emitted by a singly ionized He ion is
1.
2.
3.
4.
When neutron moving with Kinetic Energy 2eV collides with
stationary in the ground state, the collision will be:
1. Must be elastic
2. may be inelastic
3. Both
4. Must be perfectly inelastic
If an electron in a hydrogen atom jumps from the 3rd orbit, to the 2nd orbit, it emits a photon of wavelength . When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be
(1)
(2)
(3)
(4)
Whose atomic model describes electrons being embedded in a gel of positive charge?
1. | Dalton's model |
2. | Bohr's model |
3. | Thomson's model |
4. | Rutherford's model |
The ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is
(1)5/27
(2)3/23
(3)7/29
(4)9/31
Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model?
(1)1.9eV
(2)11.1eV
(3)13.6eV
(4)0.65eV
The electron in the hydrogen atom jumps from excited state to its ground state and the photons thus emitted irradiate a photosensitive material. If the work function of the material is the stopping potential is estimated to be (the energy of the electron in the nth state )
1. 2.
3. 4.
The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between
(a) n=3 to n=2 states
(b) n=3 to n=1 states
(c) n=2 to n=1 states
(d) n=4 to n=3 states