Arrange the following in the increasing order of their acidic strength: $CH_{3}COOH, CH_{2}ClCOOH, CHCl_{2}COOH, CCl_{3}COOH$.

(A) The acidic strength of carboxylic acids depends on the electron-withdrawing effect of substituents attached to the alpha-carbon. The presence of electronegative chlorine atoms increases the acidity by stabilizing the carboxylate anion through the inductive effect ($-I$ effect). As the number of chlorine atoms increases,the $-I$ effect increases,thereby increasing the acidic strength. The order is: $CH_{3}COOH < CH_{2}ClCOOH < CHCl_{2}COOH < CCl_{3}COOH$.