Amongst the following, the linear species is:

1. ${\mathrm{NO}}_2$
2. ${\mathrm{Cl}}_2\mathrm{O}$
3. ${\mathrm{O}}_3$
4. ${\mathrm{N}}_3^{-}$

Asked in: JEE Main 2021 (17 Mar Shift 2)

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