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Question

Assertion : Bond order of H+2 is 0.5.
Reason : Electrons are removed from the antibonding molecular orbital from H2.

A
Assertion is true and reason is incorrect explanation for assertion
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B
Assertion is false and reason is incorrect explanation for assertion
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C
Assertion is true and reason is correct explanation for assertion
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D
Assertion is false and reason is correct explanation for assertion
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Solution

The correct option is A Assertion is true and reason is incorrect explanation for assertion
H+2=σ1s1
Bond order=Bonding electrons - Antibonding electrons2=102=0.5

Hydrogen molecule cation H+2: This molecule ion has only one electron. This electron is present in lowermost molecular orbital i.e, σ1s. So electronic configuration of H+2 is :(σ1s)1 and
H2:(σ1s)2
So, an electron is removed from the bonding orbital of H2 to form H+2 ion.

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