In which of the following pairsof molecules/ions, both the species ar

1.	In which of the following pairsof molecules/ions, both the species are not likely to exist ?
Answer» `H_(2)^(-) , H_(2)^(2+)` `H_(2)^(+) , He_(2)^(2-)` `H_(2)^(-) , He_(2)^(2-)` `H_(2)^(2+)`, He_(2)` SOLUTION :Both `H_(2)^(2+) and He_(2)` have zero bond ORDER and hence do not exist .

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