For the given molecule $\mathrm{B}-\mathrm{A}-\mathrm{B}$ which is a linear molecule, the dipole moment of $\mathrm{A}-\mathrm{B}$ bond is $0.38 \mathrm{D}$. If bond distance is $1.9 \stackrel{\circ }{\mathrm{A}}$, then magnitude of charge on central atom is:

The molecular orbital electronic configuration of ${\mathrm{X}}_2$ is ${\left(\mathrm{\sigma }2\mathrm{s}\right)}^2{\left(\mathrm{\sigma }*2\mathrm{s}\right)}^1{\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}\right)}^1$. Which of the following is incorrect?

Select the correct option by assigning true (T) and false (F) for the following statements.

(a) In ${\mathrm{IF}}_7$, iodine is in the super octet state.

(b) ${\mathrm{BF}}_3$ is a hypervalent compound.

(c) $\mathrm{\pi }-$bond is cylindrically symmetrical.