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An electron collides with a hydrogen ato...

An electron collides with a hydrogen atom in its ground state and excites it to `n = 3` ,. The energy gives to hydrogen aton n this inclastic collision is [Neglect the recoiling of hydrogen atom]

A

10.2 eV

B

12.1 eV

C

12.5 eV

D

None of these

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • Hydrogen atom will be in its ground state , if its electrons is in

    A
    any energy level
    B
    the lowest energy state
    C
    the highest energy state
    D
    the intermediate state

  • An electron with kinetic energy E collides with a hydrogen atom in the ground state. The collision will be elastic

    A
    For all values of E
    B
    For `Elt10.2` eV
    C
    For `10.2 eV lt E lt13.6` eV only
    D
    For `0lt E lt 3.4` eV only

  • When a hydrogen atom is excited from ground state to first excited state, then

    A
    its kinetic energy increased by `20 eV`
    B
    its kinetic energy dereased by `10.2 eV`
    C
    its potential energy increased by `20.4 eV`
    D
    its angular momentum increased by `1.05 xx 10^(-34) J s`

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