Which one of the following is/are linear structure?

I. $$\mathrm{I}_3^{-}$$

II. $$\mathrm{NO}_2^{-}$$

III. $$\mathrm{I}_3^{+}$$

IV. $$\mathrm{SO}_2$$

V. $$\mathrm{N}_3^{-}$$

OF and F₂ can be compared in terms of

The structure of H₂O₂ is

In which pair or pairs is the stronger bond found in the first species?

I. O$$_2^{2 - }$$, O₂; II. N₂, N$$_2^{+ }$$; III. NO⁺, NO^$$-$$