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Q-If each hydrogen atom is excited by giving 8.4 eV of energy then the number of spectral lines emitted is equal to: (A) None (B) Two (C) Three (D) Four
Isolated hydrogen atom can absorb any of the following quanta of energy, given by the equation
Energy absorbed =13.6 ( 1 - ( 1 / n2 ) e.v. ; where n can take whole number values from 1 to infinity.
For any value of 'n' it cannot be 8.4 e.v.
So, hydrogen atom out rightly rejects that quantum. No electronic excitation takes place- no emission of radiation and it will not result in any spectral line. So, answer is 'none'
a) none
as min of 10.2 eV of energy is required to make the electron get excited.
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