M K Verma Solutions for Chapter: Chemical Bonding and Molecular Structure, Exercise 1: TOPICWISE QUESTIONS

In which of the following molecules, the central atom expands its covalency by excitation but not its octet?

(a) ${\mathrm{ICl}}_2^{-}$

(b) ${\mathrm{C}}_2{\mathrm{H}}_4$

(c) ${\mathrm{BF}}_4^{-}$

(d) ${\mathrm{SO}}_2$

Assuming the Hund's rule violated, the bond order and magnetic nature of the diatomic molecule of ${\mathrm{B}}_2$ is:

The diamagnetic species among the following is/are:

$\mathrm{a}$. ${\mathrm{O}}_2^{2-}$                 $\mathrm{b}$. ${\mathrm{F}}_2$

$\mathrm{c}$. ${\mathrm{H}}_2^{+}$                   $\mathrm{d}$. ${\mathrm{CO}}^{+}$

Among the following pairs of molecules, the strongest intermolecular hydrogen bond is present between:

What is true about the given molecules?

Which of the three molecules, ${\mathrm{H}}_2\mathrm{O}, {\mathrm{SF}}_6$ and ${\mathrm{NH}}_3$, has the minimum ratio of $\frac{\mathrm{x}}{\mathrm{y}}$ (where, $\mathrm{x}$ is the magnitude of a bond angle and $\mathrm{y}$ is the number of lone pairs of electrons in the molecule)?

The ratio of coordinate bonds, covalent bonds and hydrogen bonds in ${\mathrm{CuSO}}_4\mathbf{·}5{\mathrm{H}}_2\mathrm{O}$ is:

Considering the following three species, identify the incorrect order in the given options.

$\left(\mathrm{i}\right)$ ${\mathrm{ClO}}_4^{-}$ $\left(\mathrm{ii}\right)$ ${\mathrm{SO}}_4^{2-}$ $\left(\mathrm{iii}\right)$ ${\mathrm{PO}}_4^{3-}$