With respect to the compounds I - V , choose the correct statement(s).

The acidity of compound I is due to delocalization in the conjugate base

The conjugate base of compound IV is aromatic

Compound II becomes more acidic, when it has a - NO 2 substituent

The acidity of compounds follows the order I IV V II III

Chemistry · Chemical Kinetics

JEE Advanced 2020 — Paper 1 — Question 20

With respect to the compounds $\mathbf{I}-\mathbf{V}$ , choose the correct statement(s).

Option A:
The acidity of compound I is due to delocalization in the conjugate base
Correct
Option B:
The conjugate base of compound IV is aromatic
Correct
Option C:
Compound II becomes more acidic, when it has a $-\mathrm{NO}_{2}$ substituent
Correct
Option D:
The acidity of compounds follows the order I $>$ IV $>\mathrm{V}>$ II $>$ III

Correct order and acidity $=$ IV $>\mathrm{V}>\mathrm{I}>\mathrm{II}>$ III (Decreasing acidity)

Answer key and solution verified before publishing.

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