The correct stability order of the following resonance structures is:

In $BF_3$ molecule:

Draw the resonating structures of $(A)$ Ozone molecule $(O_3)$ and $(B)$ Nitrate ion $(NO_3^-)$.

Although $ClO_2$ is an odd-electron molecule,it does not dimerize because...

Identify the relationship between the following two structures: $\begin{matrix} \overset{\Theta}{\overset{\centerdot \,\centerdot}{C}}H_2-C(=O)-CH_3 \end{matrix}$ and $\begin{matrix} CH_2=C(O^{\Theta})CH_3 \end{matrix}$

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?