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Atoms and Nuclei Test - 2
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Atoms and Nuclei Test - 2

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  • Question 1/10
    4 / -1
    α – particles of kinetic energy 7.7 MeV are being scattered by the nucleus of gold which has 79 electrons. The distance of closest approach of the alpha particles is

  • Question 2/10
    4 / -1
    The orbital frequency of an electron in the hydrogen atom is proportional to
    Solutions

  • Question 3/10
    4 / -1
    The product of linear momentum and angular momentum of an electron of the hydrogen atom is proportional to nx, where x is
    Solutions

  • Question 4/10
    4 / -1
    Which of the following transitions in Balmer series for hydrogen will have longest wavelength?
  • Question 5/10
    4 / -1
    Ionisation energy of He+ ion at minimum position is
  • Question 6/10
    4 / -1
    Which of the following transition gives the photon of minimum frequency?
  • Question 7/10
    4 / -1
    According to Bohr's theory of hydrogen atom, for the electron in the nth allowed orbit the
    I. . linear momentum is proportional to 1/n
    II. radius is proportional to n
    III. kinetic energy is proportional to 1/n2
    IV. angular momentum is proportional to n
    Choose the correct option from the codes given below.
  • Question 8/10
    4 / -1
    The radius of hydrogen atom in its ground state is 5.3 × 10-11 m. After collision with an electron it is found to have a radius of 21.2 × 10-11 m. What is the principal quantum number n of the final state of atom ?
    Solutions

  • Question 9/10
    4 / -1
    If an electron is revolving around the hydrogen nucleus at a distance of 0.1 nm, what should be its speed?
    Solutions

  • Question 10/10
    4 / -1
    Continuous emission spectrum is produced by
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