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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

2 E

C

0.5 E

D

4 E

Text Solution

Verified by Experts

The correct Answer is:
D
(d) `1_2(He^+) = Z^2 E_1 (H) = 2^2 xx E = 4 E`.
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