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Radiation coming from transition n = 2 t...

Radiation coming from transition `n = 2 to n = 1` of hydrogen atoms falls on helium in `n = 1 and n= 2` state. What are the possible transition of helium ions as they absorb energy from the radiation?

A

`n=2rarrn=3`

B

`n=1rarrn=4`

C

`n=2rarrn=5`

D

`n=2rarrn=4`

Text Solution

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The correct Answer is:
D
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Radiation corresponding to the transition n=4 to n=2 in hydrogen atoms falls on a certain metal (work function=2.5 eV). The maximum kinetic energy of the photo-electrons will be:

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Knowledge Check

  • The frequency corresponding to transition n = 1 to n = 2 in hydrogen atom is.

    A
    `15.66 xx 10^10 Hz`
    B
    `24.66 xx 10^14 Hz`
    C
    `30.57 xx 10^14 Hz`
    D
    `40.57 xx 10^24 Hz`

  • Radiation corresponding to the transition n = 4 to n = 2 in hydrogen atoms falls on a certain metal( work function = 2.0 eV ). The maximum kinetic energy of the photoelectrons will be :

    A
    0.55 eV
    B
    2.55 eV
    C
    4.45 eV
    D
    None

  • If an electron transits from n = 7 to n = 1 in a hydrogen atom then the maximum number of spectral lines that can form will be?

    A
    15
    B
    10
    C
    5
    D
    6

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