In $O_{2}$ and $H_{2}O_{2}$, the $O-O$ bond lengths are $1.21 \mathring{A}$ and $1.48 \mathring{A}$ respectively. In ozone $(O_{3})$, the average $O-O$ bond length is

Examine the following resonating structures of formic acid for their individual stability and then answer the question given below.
$(I)$ $H-COOH$
$(II)$ $H-C(OH)=O^+$
$(III)$ $H-C^+(OH)-O^-$
$(IV)$ $H-C^-(OH)-O^+$
Which of the following arrangements gives the correct order of decreasing stability of the above-mentioned resonance contributors?

Consider the following three resonance structures:
The correct order of their stabilities is:

Write the resonance structures of $CO_3^{2-}$ and $HCO_3^{-}$.

Write the resonance structures for $SO_{3}$,$NO_{2}$ and $NO_{3}^{-}$.

Write the rules to decide the relative stability of different resonance structures.