A+Bsteam volatile....←dil.HNO3phenol→Conc.HNO3C; correct oder of Pka values is
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a
A > B > C
b
B > C > A
c
C > A > B
d
B > A > C
answer is D.
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Detailed Solution
-NO2 group increases the acidic strength of phenol acidic strength of This is because in o-nitrophenol, chelation occurs due to intra molecular H-bonding.Proton is less available for donation.∴Acidic strength of p-nitro phenol>o-nitro phenol>phenol.Pka of B>A>C