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Q.

An electron revolve round the nucleus of  a hydrogen like  atom of atomic no  4. In order to excite the electron from state n=2 to n=3 the energy required is

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a

47.2 eV

b

30.2 eV

c

17 eV

d

13.6 eV

answer is B.

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Detailed Solution

Energy of H atom = 13.614−1916= energy required
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