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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

`6.56xx10^(5)Jmol^(-1)`

B

`7.56xx10^(5)Jmol^(-1)`

C

`9.84xx10^(5)Jmol^(-1)`

D

`8.51xx10^(5)Jmol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaE=1.312xx10^(6)[1/1^(2)-1/2^(2)]`
= `1.312xx10^(6)xx3/4=0.984xx10^(6)=9.84xx10^(5)J//mol`.
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