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Question

The correct statement with regard to H+2 & H2 is

A

both H+2 & H2 are equally stable

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B

H+2 is more stable than H2

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C

H2 is more stable than H+2

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D

both H+2 & H2 is do not exist

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Solution

The correct option is B

H+2 is more stable than H2


Bond order =12(ElectronsinbondingorbitalsElectronsinantibondingorbitals)

The electronic configuration of H+2=σ1s1

B.O =12(10)=12

The electronic configuration of H2=σ1s2σ1s1

B.O =12(21)=12

Therefore, the bond order of both ions is the same. But the H+2 is more stable than H2 even though the bond order is the same in both cases. This is because the fact that presence of an antibonding electron in H2 lowers its stability as compared to H+2.


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