NEET Sample Paper NEET Sample Test Paper-1

  • question_answer 66) 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 compound

    B)  soap is insoluble in the presence of chloride ions

    C)  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.

    Correct Answer: D

    Solution :

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

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