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If radiation correcsponding to second li...

If radiation correcsponding to second line of “Balmer series” of `Li^(2+)` ion, knocked out electron from first excited state of H-atom, then kinetic energy of ejected electron would be:

A

2.55 eV

B

4.25 eV

C

11.25 eV

D

19.55 eV

Text Solution

Verified by Experts

The correct Answer is:
D
`E = 13.6 xx Z^2[1/(n_1^2)- 1/(n^2)] = 13.6xx3^2 [1/(2^2) - 1/(4^2)]`
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