MCQ
Compare relative stability of the following resonating structure.
  • A
    $p > q > r$
  • B
    $q > p > r$
  • C
    $q > r > p$
  • $p > r > q$

Answer

Correct option: D.
$p > r > q$
d
$(d)$ $(i)\, -ve$ charge on electronegative atom increases stability.
$(ii)$ $- C \equiv N$ system is more stable than $C = C = N$ system. So stability  order is $p > r > q$

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Similar questions

Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below.

$\mathrm{A}+\mathrm{B} \underset{\text { Step } 3}{\text { Step } 1} \mathrm{C} \xrightarrow{\text { Step } 2} \mathrm{P}$

Some details of the above reaction are listed below.

Step

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$\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)$

$1$ ${k}_1$ $300$
$2$ ${k}_2$ $200$
$3$ ${k}_3$ $\mathrm{Ea}_3$

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