The total number of lone pairs of electrons in the given molecule is

Identify the incorrect statements among the following:
$(i) \ SF_6$ does not react with water
$(ii) \ SF_6$ is $sp^3d$ hybridized
$(iii) \ S_2O_3^{2-}$ is a linear ion
$(iv)$ There is no $\pi$-bonding in $SO_4^{2-}$ ion

Choose the correct sequence for the geometry of the given molecules: Borazone,Borazole,$B_3O_6^{3-}$,$Fe_2Cl_6$,trimer of $FCN$. ['$P$' stands for planar and '$NP$' stands for non-planar]

The number of molecules from the following which contain only two lone pairs of electrons is $........$.
$H_2O, N_2, CO, XeF_4, NH_3, NO, CO_2, F_2$

Which of the following molecules has an axis of symmetry and a coaxial plane of symmetry?

In the trimer form of sulphur trioxide $(S_3O_9)$,each sulphur atom is bonded with: