JEE Advanced2020ChemistryGeneral Organic ChemistryActual
With respect to the compounds I - V choose the correct statement(s).
Options
- AThe acidity of compound I is due to delocalization in the conjugate base.
- BThe conjugate base of compound IV is aromatic.
- CCompound II becomes more acidic, when it has a - NO 2 substituent.
- DThe acidity of compounds follows the order I > IV > V > II > III .
Correct answer
A. The acidity of compound I is due to delocalization in the conjugate base.
Step-by-step solution
( A ) is stabilised by conjugation ( B ) Conjugation base of is which is an aromatic anion ( C ) - NO 2 group is an electron withdrawing group it increases acidic strength of any compound to which it is added. ( D ) The acidic strength order on the basis of pK a data IV > V > I > II > III is