Which of the following species is neither hypervalent nor hypovalent?

The correct formal charges on oxygen atoms numbered $2$,$1$ and $3$ respectively are:

Which of the following is the correct set for $SiO_2$?

Select the incorrect statement about $N_2F_4$ and $N_2H_4$ :
$(I)$ In $N_2F_4$,$d$-orbitals are contracted by electronegative fluorine atoms,but $d$-orbital contraction is not possible by $H$ atoms in $N_2H_4$.
$(II)$ The $N-N$ bond energy in $N_2F_4$ is more than the $N-N$ bond energy in $N_2H_4$.
$(III)$ The $N-N$ bond length in $N_2F_4$ is more than that in $N_2H_4$.
$(IV)$ The $N-N$ bond length in $N_2F_4$ is less than that in $N_2H_4$.
Choose the correct code:

Observe the following structure. The formal charges on the atoms $1, 2, 3$ respectively are:

Which of the following does not have the correct order of the given property?