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Chemistry Question on Chemistry in Everyday Life

Among the following marked proton of which compound shows lowest pKapK_a value ?

A

Among the following marked proton of which compound shows lowest  pKa value ?

B

Among the following marked proton of which compound shows lowest  pKa value ?

C

Among the following marked proton of which compound shows lowest  pKa value ?

D

Among the following marked proton of which compound shows lowest  pKa value ?

Answer

Among the following marked proton of which compound shows lowest  pKa value ?

Explanation

Solution

(A)

Among the following marked proton of which compound shows lowest  pKa value ?

(B)
Among the following marked proton of which compound shows lowest  pKa value ?

(C)
Among the following marked proton of which compound shows lowest  pKa value ?

(D)
Among the following marked proton of which compound shows lowest  pKa value ?
The conjugate base of compound (C) is stabilized by extended conjugation.