The sum of lone pairs present on the central atom of the interhalogen $IF_5$ and $IF_7$ is $.........$.

Identify the molecule $(X)$ with the maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $HNO_{3}$, $H_{2}SO_{4}$, $NF_{3}$, and $O_{3}$. Choose the correct bond angle made by the central atom of the molecule $(X)$. (in $^{\circ}$)

Trisilyamine $(SiH_3)_3N$ is

The correct order of the bond angles of the given compounds is

$SF_6$ is a kinetically inert substance because

$BCl_3$ is a planar molecule while $NCl_3$ is pyramidal,because