Question

For the given resonating structures ,


The correct stability order is :

• A. $\left(i\right)>\left(ii\right)>\left(iii\right)$
• B. $\left(i\right)>\left(iii\right)>\left(ii\right)$
• C. $\left(ii\right)>\left(i\right)>\left(iii\right)$
• D. $\left(iv\right)>\left(iii\right)>\left(ii\right)$

Answer 1

The correct option is B $\left(i\right)>\left(iii\right)>\left(ii\right)$

Structure (i) is the most stable because it has the most number of covalent bonds, is neutral and has complete octet of all the atoms.
In structure (iii), unlike charges are near to each other, whereas in sturcutre (ii), unlike charges are farther relatively. So, structure (iii) is more stable than structure (ii).
Correct order is :
$\left(i\right)>\left(iii\right)>\left(ii\right)$