VMMC VMMC Medical Solved Paper-2014

  • question_answer
    Which one of the following substances is used for preservation?               

    A) \[NaCl\]                              

    B) \[C{{H}_{3}}COOH\]

    C) Sodium benzoate           

    D) \[KMn{{O}_{4}}\]

    Correct Answer: C

    Solution :

    Sodium behzoate is used for preservation of food. Its chemical formula is $Na{{C}_{6}}{{H}_{5}}C{{O}_{2}}.$ It is sodium salt of benzole acid and exists in this form when dissolved in water. It can be produced by reacting Na $Na{{(OH)}_{2}}$with benzoic acids and acts as fungicides and bacteriocide under acidic condition. It is used to preserve, jam, jelly pickles, condiments and soft drinks.


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