Arrange the following molecules in order of increasing fundamental vibrational frequencies
1
\(\mathrm{O}_2^{2-}<\mathrm{O}_2^{-}<\mathrm{O}_2<\mathrm{O}_2^{+}\)
2
\(\mathrm{O}_2<\mathrm{O}_2^{+}<\mathrm{O}_2^{-}<\mathrm{O}_2^{2-}\)
3
\(\mathrm{O}_2^{2-}<\mathrm{O}_2^{-}<\mathrm{O}_2^{+}<\mathrm{O}_2\)
4
\(\mathrm{O}_2^{+}<\mathrm{O}_2<\mathrm{O}_2^{-}<\mathrm{O}_2^{2+}\)
5
Question Not Attempted