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Ionisation potential of hydrogen atom is 13.6 ~V . Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV . The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

Options

  1. Aone
  2. Btwo
  3. Cfour
  4. Dthree

Correct answer

D. three

Step-by-step solution

Energy in the excited state =-13.6+12.1=-1.5 eV - 13.6 n^2 =-1.5 or n= 13.6 1.5 =3 Number of spectral lines = n(n-1) 2 = 3(3-1) 2 =3

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