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If first ionisation energy of hydrogen b...

If first ionisation energy of hydrogen be `E`, then the ionisation energy of `He^+` would be :

A

E

B

2E

C

0.5E

D

4E

Text Solution

Verified by Experts

The correct Answer is:
D
`I_(2)(He^(2+))=Z^(2)I_(1)(H)`
`=2^(2)xxE=4E`
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