Q. No.When a hydrogen atom is bombarded, the atom is excited to n = 4 state. The energy released, when the atom goes from n = 4 state to the ground state is:
1. 1.75 eV
2. 12.75 eV
3. 5 eV
4. 8 eV
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The ionization energy of the hydrogen atom is 13.6 eV. Following Bohr's theory, the energy corresponding to a transition between 3rd and 4th orbit is:
1. 3.40eV
2. 1.51 eV
3. 0.85 eV
4. 0.66 eV
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If and are the potential energy and kinetic energy of the electron in a stationary orbit in the hydrogen atom, the value of is-
1. 2
2. -1
3. 1
4. -2
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Consider the spectral line resulting from the transition in the atoms and ions given below. The shortest wavelength is produced by:
1. hydrogen atom
2. deuterium atom
3. singly ionized helium
4. doubly ionized lithium
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If the electron in a hydrogen atom were in the energy level with how much energy in joule would be required to ionize the atom? (Ionization energy of H-atom is 2.18):
1. 6.54
2.
3.
4.
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In a hydrogen atom, the electron is in \(n^\text{th}\) excited state. Knowing that on its way down to the second excited state, the number of different wavelengths that the electron can possibly emit is \(10 .\) What is the value of \(n? \)
1. \(6\)
2. \(7\)
3. \(8\)
4. \(5\)
Consider the following electronic energy level diagram of H-atom: Photons associated with the shortest and longest wavelengths would be emitted from the atom by the transitions labeled-
1. B and C respectively
2. C and A respectively
3. C and D respectively
4. A and C respectively
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The wavelength of the spectral line that corresponds to a transition in a hydrogen atom from n=10 to ground state would be and in which part of the electromagnetic spectrum this line lies?
1. 92.25 nm, ultraviolet
2. 92.25 nm, infrared
3. 86.95 nm, ultraviolet
4. 97.65 nm, ultraviolet
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The angular momentum of an electron in the hydrogen atom is 4h/2. Kinetic energy of this electron is:
1. 4.35 eV
2. 1.51 eV
3. 0.85 eV
4. 13.6 eV
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In a hydrogen atom, the electron makes a transition from n=2 to n=1. The magnetic field produced by the circulating electron at the nucleus:
1. decreases 16 times
2. increases 4 times
3. decreases 4 times
4. increases 32 times
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