What is the difference between the bond angles in the cationic species of $PCl_5$ and $PBr_5$ in the solid state?

Which of the following is the correct order of increasing $O-O$ bond length in the given compounds?

Which one of the following statements is correct?

The incomplete Lewis representation of $CO_3^{2-}$ is given below. The formal charges on atoms marked as $a$,$b$,and $c$,respectively,are

The formal charges of $N_{(1)}$,$N_{(2)}$,and $O$ atoms in the structure $N_{(1)} = N_{(2)} = O$ are respectively:

Select true or false statements :
$(a)$ Promotion of electron is essential condition prior to hybridisation
$(b)$ In $VSEPR$ theory,two or three electron pairs of a multiple bond are treated as a single super pair
$(c)$ Bond length for $CO_2$ lies between double and triple bonds
$(d)$ $Ne_2$ does not exist