1.

In which of the following pairs of molecules / ions, both the species are not likely to exist ?

Answer»

`H_(2)^(+), He_(2)^(2-)`
`H_(2)^(-), He_(2)^(2-)`
`H_(2)^(2+), He_(2)`
`H_(2)^(-), He_(2)^(2+)`

SOLUTION :BOND order of `H_(2)^(2+)`and `He_(2)`are zero and THEREFORE, these do not exist.


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