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The ionisation energy of hydrogen atom ...

The ionisation energy of hydrogen atom is `1.312xx10^(6) J "mol"^(-1)`. Calculate the energy required to excite an electron in a hydrogen atom from the ground state to the first excited state.

A

`8.51 xx 10^(5) "J mol"^(-1)`

B

`6.56 xx 10^(5) "J mol"^(-1)`

C

`7.56 xx 10^(5) "J mol"^(-1)`

D

`9.84 xx 10^(5) "J mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Delta E= E_2 -E_1 [ because I. E = - E_1]`
`= (-1.312 xx 10^(6) )/(2^2) - ((-1.312 xx 10^(6) )/(1))`
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