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KVPY Sample Paper KVPY Stream-SX Model Paper-16

  • question_answer
    Two tubes labelled 'P' and 'Q' contain food stuff. Tube 'P' gave positive test with Benedict's solution while tube 'Q' gave positive test with nitric acid. Which of the following is correct?

    A) Tube 'P' contains sugar, tube 'Q' contains protein

    B) Tube 'P' contains protein, tube 'Q' contains sugar

    C) Both, tube 'P' and tube 'Q' contain sugar

    D) Both, tube 'P' and tube 'Q' contain protein

    Correct Answer: A

    Solution :

    The Benedict's test is used to test for simple sugars. The nitric acid reacts with proteins to form yellow nitrated products, thus used to detect proteins in sample. Therefore, the tube 'P', positive for Benedict's test and tube 'Q' positive for nitric acid contains sugar and protein, respectively.


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