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Assertion Energy E(1) is required to rem...

Assertion Energy `E_(1)` is required to remove first electron from helium atom and energy `E_(2)` is to required to remove the second electron . Them `E_(1)ltE_(2).`
Reason Ionisation energy of single electron of `He^(+)` is 54.4 eV.

A

If both Assertion and Reason ar true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true but Reason is not correct explanation of Assertion

C

If Assertion is true by Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
`E_(H)=13.6eV` (inoisation energy )
`E_(He^(+))=13.6(Z)^(2)=(13.6)(Z)^(2)=54.4eV`
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