1.

The correct statement with regard to H_(2)^(+) and H_(2)^(-) is

Answer»

Both `H_(2)^(+)` and `H_(2)^(-)` do not EXIST
`H_(2)^(-)` is more stable than `H_(2)^(+)`
`H_(2)^(+)` is more stable than `H_(2)^(-)`
Both `H_(2)^(+)` and `H_(2)^(-)` are equally stable

Solution :`H_(2)^(+): (sigma1s^(-1)), BB.O. =(1)/(2)(1-0)=(1)/(2)`
`H_(2)^(-) : (sigma1s^(2))( SIGMA^( * *) 1s^(1)) , B.O=(1)/(2) (2-1) =(1)/(2)`
Even though the bond order of `H_(2)^(+) and H_(2)^(-)` are equal but `H_(2)^(+)` is more stable than `H_(2)^(-)` as in the latter, an electron is present in the antibonding `(sigma ^(* *) 1s)` orbital of higher energy


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