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When an electron jumps from a level n =...

When an electron jumps from a level `n = 4` to ` n = 1`, the momentum of the recoiled hydrogen atom will be

A

`6.8xx10^(-27)"kg ms"^(-1)`

B

`12.75xx10^(-19)"kg ms"^(-1)`

C

`13.6xx10^(-19)"kg ms"^(-1)`

D

zero

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The correct Answer is:
A
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In Bohr's atomic model for hydrogen like atoms match the following column : {:(,"Column I",,"Column II"),((A),"If electron jumps from n = 32 to n = 1",(p),"Speed of electron will become 2 times"),((B),"If electron jumps from n = 1 to n = 4",(q),"Kinetic energy of electron will become 4 time"),((C),"If electron jumps from n = 4 to n = 4",(r),"Angular momentum of electron will becomes 2 times"),(,,(s),"Angular velocity of electron will becomes 4 times"),(,,(t),"None"):} .

In hydrogen atom, electron makes transition from n = 4 to n = 1 level. Recoil momentum of the H atom will be

Knowledge Check

  • When electron jumps from n = 4 to n = 1 orbit, we get

    A
    second line of Lyman series
    B
    second line of Balmer series
    C
    second line of Paschen series
    D
    an absorption line of Balmer series

  • In a stationary hydrogen atom, an electron jumps from n = 3 ot n =1. The recoil speed of the hydrogen atom is about

    A
    `4 m//s`
    B
    `4 cm//s`
    C
    `4 mm//s`
    D
    `4xx10^(-4) m//s`

  • When electron jumps from n=4 level to n=1 level,the angular momentum of electron changes by

    A
    `h/(2pi)`
    B
    `(2h)/(2pi)`
    C
    `(3h)/(2pi)`
    D
    `(4h)/(2pi)`

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