• # question_answer When $NaCl$ is added to the reaction mixture of an oil and caustic soda, the soap is thrown out because A)  $NaCl$ is an ionic compoundB)  soap is insoluble in the presence of chloride ionsC)  the solubility product of $NaCl$ decreases in the presence of soap.D)  the solubility of the soap is exceeded due to the increased concentration of $N{{a}^{+}}$ ions.

$\underset{Soap}{\mathop{RCOONa}}\,RCO{{O}^{-}}+N{{a}^{+}}$ On adding $NaCl,$$[N{{a}^{+}}]$ increases. Hence, ionic product of $[RCO{{O}^{-}}]\,\,[N{{a}^{+}}]$ exceeds the solubility product.