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ChemistryGOCRESONANCE AND MESOMERIC EFFECTMedium2 minPYQ_2022

ChemistryMediumsingle choice

Among the following marked proton of which compound shows lowest ${pK}_{a}$ value?

Question diagram: Among the following marked proton of which compound shows lo

Options:

Answer:

Solution:

The smaller the value of $pKa$ , the stronger the acid. The acidic nature of the compound depends on the stability of conjugate base.
The stability of conjugate base formed by above compound is more stable than other three compounds given.
So it has least $pKa$ value.

Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT

⏱ 2mℹ️ Source: PYQ_2022

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