JEE Main & Advanced Sample Paper JEE Main - Mock Test - 31

  • question_answer
    Which of the following represents soap?

    A) \[{{\operatorname{C}}_{17}}{{H}_{35}}COOK\]

    B)        \[{{\operatorname{C}}_{17}}{{H}_{35}}COOH\]

    C) \[{{\operatorname{C}}_{15}}{{H}_{31}}COOH\]         

    D) \[{{\left( {{\operatorname{C}}_{17}}{{H}_{35}}COO \right)}_{2}}Ca\]

    Correct Answer: A

    Solution :

    Soaps are the sodium or potassium salt of higher fatty acids e.g., \[{{C}_{17}}{{H}_{35}}COOK\] (Potassium stearate). These are obtained by alkaline hydrolysis of oils and fats. The reaction is called saponification.


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