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Question

Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr's theory will be:


A
One
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B
Two 
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C
Three
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D
Four
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Solution

The correct option is C Three

ΔE=13.6E2=12.1 eV
E2=1.5 eV

The final state corresponds  to n = 3.
Total number of lines observed =n2×(n21)2=3

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