SSC General Science & Technology Sample Paper NCERT Sample Paper-2

  • question_answer
    Which of the micro-organism is used for production of citric acid in industries?

    A)  Lactobacillus bulgaris

    B)  Penicilliumcitrinum

    C)  Aspergillusniger

    D)  Rhizopusnigricans

    Correct Answer: C

    Solution :

    [c] At one time, citric acid was commercially prepared from concentrated lemon juice, but now its main source is the fermentation of sugar with Aspergillusniger. Citric Acid has an extraordinary range of uses. It gives tartness and flavour to foods. It is an antioxidant and pH adjuster in many foods and dairy products; it often serves as an emulsifier.

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