State if the following statements about RESONANCE are true or false.

Canonical forms of any structure have no real existence.

The above compound represents hydrogen azide, the bond orders of bonds $\left(\mathrm{I}\right)$ and $\left(\mathrm{II}\right)$ are:

Resonance in carbonate ion $\left({\mathrm{CO}}_3^{2-}\right)$ is

Which of the following is true?

The molecule/molecules that has/have delocalised lone pair(s) of electrons is/are

Find out the correct order of ionic character in the following molecules

$\left(\mathrm{i}\right) {\mathrm{SO}}_2$     $\left(\mathrm{ii}\right) {\mathrm{K}}_2\mathrm{O}$     $\left(\mathrm{iii}\right) {\mathrm{N}}_2$    $\left(\mathrm{iv}\right) \mathrm{LiF}$

Give a reason for the following:

Ionic compounds have a high melting point.