Which of the following is not isostructural with ${\mathrm{SiCl}}_4$?

The species, which can have all atoms in the same plane is/are:

$\mathrm{a}. {\mathrm{H}}_2{\mathrm{SO}}_4$

$\mathrm{b}. {\mathrm{H}}_2\mathrm{O}$

$\mathrm{c}. {\mathrm{HNO}}_3$

$\mathrm{d}. {\mathrm{CCl}}_4$

A diatomic molecule has a dipole moment of $1.2 \mathrm{D}$. If its bond distance is $1.0 \mathrm{\AA }$ , what percentage of an electronic charge, $\mathrm{e}$, exists on each atom? $\left(1\mathrm{D}={10}^{-18}\mathrm{esu} \mathrm{cm}\right.$ and $\left.\mathrm{e}=4.8\times {10}^{-10} \mathrm{esu}\right)$

Round off your answer to the nearest integer.

The formal charge on $\mathrm{S}-$atom in the following structure is:

${\left[:\stackrel{..}{N}=C=\stackrel{..}{S}:\right]}^{-}$