Embibe Experts Solutions for Chapter: Chemical Bonding and Molecular Structure, Exercise 2: Exercise-2

Number of molecule or ions having lone pairs $\ge 2$ for the central atom are:

(i) ${\mathrm{HClO}}_4$ (ii) ${\mathrm{HClO}}_3$ (iii) ${\mathrm{HClO}}_2$ (iv) ${\mathrm{H}}_2\mathrm{O}$ (v) ${\mathrm{NH}}_2^{-1}$ (vi) ${\mathrm{CIF}}_3$ (vii) ${\mathrm{XeF}}_2$ (viii) ${\mathrm{XeF}}_4$ (ix) ${\mathrm{XeF}}_6$ (x) ${\mathrm{I}}_3^{-1}$ (xi) ${\mathrm{N}}_3^{-1}$ (xii) ${\mathrm{O}}_3$ (xiii) ${\mathrm{ICl}}_4^{-}$ (xiv) ${\mathrm{ICl}}_2^{+}$ (xv) ${\mathrm{XeO}}_3$ (xvi) ${\mathrm{XeF}}_5^{-1}$

Total number of resonating structures in ${\mathrm{CO}}_3^{2-}$ are:

Compound ${\mathrm{SO}}_3$ has $\mathrm{x}$ bond pairs and $\mathrm{y}$ lone pairs. Calculate the value of $\mathrm{x}+\mathrm{y}.$

Find the number of molecules having two lone pairs on the central atom.

(i) ${\mathrm{I}}_3^{+}$ (ii) ${\mathrm{XeF}}_2$ (iii) ${\mathrm{XeF}}_4$ (iv) ${\mathrm{H}}_2\mathrm{O}$ (v) ${{\mathrm{NH}}_2}^{-}$ (vi) ${\mathrm{H}}_2\mathrm{S}$ (vii) ${\mathrm{H}}_2{\mathrm{SO}}_4$ (Viii) ${\mathrm{NF}}_3$

Consider $\mathrm{y}$-axis as internuclear axis. How many of the following will lead to $\mathrm{\pi }$ bond formation:

(i) ${\mathrm{p}}_{\mathrm{y}}-{\mathrm{p}}_{\mathrm{y}}$ (ii) ${\mathrm{p}}_{\mathrm{x}}-{\mathrm{p}}_{\mathrm{x}}$ (iii) ${\mathrm{p}}_{\mathrm{z}}-{\mathrm{p}}_{\mathrm{z}}$ (iv) ${\mathrm{d}}_{\mathrm{xy}}-{\mathrm{d}}_{\mathrm{xy}}$ (v) ${\mathrm{d}}_{\mathrm{yz}}-{\mathrm{d}}_{\mathrm{yz}}$ (vi) ${\mathrm{p}}_{\mathrm{x}}-{\mathrm{d}}_{\mathrm{xy}}$ (vii) ${\mathrm{d}}_{\mathrm{xy}}-{\mathrm{p}}_{\mathrm{z}}$ (viii) ${\mathrm{d}}_{\mathrm{xz}}-{\mathrm{d}}_{\mathrm{xz}}$

Which of the following Lewis diagram is/are incorrect?

Which are the exceptions to the Lewis octet rule?

Which species have same bond order?