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Q.

What is the energy (in eV) required to excite the electron from n = 1 to n = 2 state in hydrogen atom? (n = principal quantum number)

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a

13.6

b

3.4

c

17.0

d

10.2

answer is D.

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Detailed Solution

According to Bohr equation,
E2−E1=13.61n22−1n12 ev
 or, ΔE=13.61n12−1n22=13.61−14=10.2eV

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