Both $N(SiH_3)_3$ and $NH(SiH_3)_2$ compounds have a trigonal planar skeleton. Which of the following statements is incorrect regarding these compounds?

Which one of the following conversions involves a change in both hybridisation and shape?

The pair of molecules/ions with the same geometry but central atoms in different states of hybridization is:

The number of $\sigma$ bonds,$\pi$ bonds and lone pair of electrons in pyridine,respectively are:

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:

Which among the following is an example of an odd electron molecule?