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An electron in a hydrogen atom undergoes...

An electron in a hydrogen atom undergoes a transition from higher energy level to a lower energy level. The incorrect statement of the following is

A

kinetic energy of the electron increases.

B

velocity of the electron increases

C

angular momentum of the electron remains constant.

D

wavelengths of de-Broglie wave associated with the motion of electron decreases.

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The correct Answer is:
C,A,B,D
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