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  4. If the binding energy of ground state electron in a hydrogen atom is 13.6 eV, then, the energy required to remove the electron from the second excited state of Li 2+ will be: x × 10-1 eV. The value of x is

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Q. If the binding energy of ground state electron in a hydrogen atom is $13.6 \,eV$, then, the energy required to remove the electron from the second excited state of $Li ^{2+}$ will be : $x \times 10^{-1} eV$. The value of $x$ is

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Solution:

Correct answer is '136'