Question
Which one is the most acidic compound?
A.
B.
C.
D.
Answer :
Solution :
Thinking process This problem is based on the acidic character of phenol. Electron - withdrawing group at $$o$$ and $$p$$ - position $$w.r.t.$$ $$-OH$$ group of Phenol, increase the acidic strength.
Picric acid ( 2, 4, 6 - trinitrophenol ) is extremely more acidic than given compounds because its $$pKa$$ value is close to zero also due to the presence of three strong electron withdrawing group ( $${ - N{O_2}}$$ group ) at $$ortho$$ and $$para$$ - positions, picric is more acidic compound.
Thinking process This problem is based on the acidic character of phenol. Electron - withdrawing group at $$o$$ and $$p$$ - position $$w.r.t.$$ $$-OH$$ group of Phenol, increase the acidic strength.
Picric acid ( 2, 4, 6 - trinitrophenol ) is extremely more acidic than given compounds because its $$pKa$$ value is close to zero also due to the presence of three strong electron withdrawing group ( $${ - N{O_2}}$$ group ) at $$ortho$$ and $$para$$ - positions, picric is more acidic compound.