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When an electron in hydrogen atom is excited, from its 4th to 5th stationary orbit, the change in angular momentum of electron is (Planck’s constant: h=6.6×10-34J - s)

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a

4.16×10-34 J - s

b

3.32×10-34 J - s

c

1.05×10-34 J - s

d

2.08×10-34 J - s

answer is C.

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Detailed Solution

Change in the angular momentum ΔL=L2-L1=n2h2π-n1h2π⇒ΔL=h2π(n2-n1) =6.6×10-342×3.14(5-4)=1.05×10-34J - S

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When an electron in hydrogen atom is excited, from its 4th to 5th stationary orbit, the change in angular momentum of electron is (Planck’s constant: h=6.6×10-34J - s)