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The ionisation energy of H atom is 13.6...

The ionisation energy of H atom is `13.6 eV` The inoisation energy of `Li^(2+)` law will be

A

`54.5 eV`

B

`40.8 eV`

C

`27.2 eV`

D

`122.4 eV`

Text Solution

Verified by Experts

The correct Answer is:
D
`I.E._(Li^(2+)) = Z^2 xx I.E. (H)`
`= 9 xx 13.6 eV = 122.4 eV`.
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MODERN PUBLICATION-STRUCTURE OF ATOM-COMPETITION FILE ,OBJECTIVE TYPE QUESTIONS (A. MULTIPLE CHOICE QUESTIONS)
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  2. What transition in the hydrogen spectrum would have the same wavelen...

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  3. The ionisation energy of H atom is 13.6 eV The inoisation energy of...

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  4. The radius of first orbit of hydrogen is 0.53 Å. The radius of second ...

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  5. How many spectrual lines are emitted by atomic Hydrogen, when an elect...

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  6. According to Bohr's theory, the radius of the n^(th) orbit of an atom ...

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  7. What transition in He^(o+) ion shall have the same wave number as ...

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  8. The ratio of the differrence between the first and second Bohr orbit e...

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  9. Which of the following transitions have minimum wavelength

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  10. In a hydorgen atom, enegry of the first excited state is -3.4 eV. Find...

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  11. The ratio of the radii of the first three Bohr orbit in H atom is

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  12. The ratio of the frequency corresponding to the third line in the lyma...

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  13. Three energy levels E1, E2 and E3 and the wave lengths produced by tra...

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  14. The de-Broglie wavelength of an electron is 600 nm. The velocity of th...

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  16. If uncertainty in possition of electron is zero, then the uncertainty...

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