A) -M effect
B) -I effect
C) + M effect
D) +I effect
Correct Answer: B
Solution :
\[-Cl\] is an electron withdrawing (ie, \[-I\] showing) group. It withdraws electrons when attached to the carboxylic acid and decreases the electron density on the oxygen atom. This will facilitate the release of H+ by making\[O-H\] bond more polar and thus \[-Cl\]increases the acidity of acetic acid when attached at, a position because of \[-I\] effect.
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