Which of the following is not a Lewis base?

Identify the correct match.

In the formation of a molecule by atoms,which forces operate?

The formal charge on the central oxygen atom in ozone $(O_3)$ is:

$XeF_4$ has a total of $36$ valence electrons. Select the correct statement regarding the use of valence electrons in $XeF_4$.

Which of the following statement$(s)$ is/are correct? [$T$ for True and $F$ for False$]$
$(a)$ Hybrid orbitals form stronger bonds than pure atomic orbitals.
$(b)$ Canonical structures have a difference in the arrangement of atoms $w.r.t.$ each other.
$(c)$ Any symmetrical molecule always contains the same bond angle.
$(d)$ $VSEPR$ theory can explain the square planar geometry of $XeF_4$.