The Valence Shell Electron Pair Repulsion (VSEPR) Theory

In the structure of ${\mathrm{IF}}_7$ (Iodine heptafluoride):

How many of the following species are linear with zero dipolemoment ${\mathrm{XeF}}_2,{\mathrm{CO}}_2,{\mathrm{I}}_3^{-},{\mathrm{N}}_2\mathrm{O},{\mathrm{NO}}_2^{+},{\mathrm{SCN}}^{-},{\mathrm{OCN}}^{-},{\mathrm{N}}_3^{-}$

Compound ${\mathrm{SO}}_3$ has $\mathrm{x}$ bond pairs and $\mathrm{y}$ lone pairs. Calculate the value of $\mathrm{x}+\mathrm{y}.$

The geometry around how many carbon atoms is tetrahedral in the given structure?

How many lone pairs are present in the given cation?

Choose the correct statements.