In which of the following pairs of molecules/ions

CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

In which of the following pairs of molecules/ions, both the species are not likely to exist? (1)

\text{H}_2^{2+}

\text{He}_2

(2)

\text{H}_2^-

\text{He}_2^{2+}

(3)

\text{H}_2^+

\text{He}_2^{2-}

(4)

\text{H}_2^-

\text{He}_2^{2-}