SSC Sample Paper NCERT - Sample Paper-5

  • question_answer
    What is the role of ultraviolet (UV) radiation in the water purification systems?                                              (2014)
    1. It inactivates/kills the harmful microorganisms in water.
    2. It removes all the undesirable odours from the water.
    3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
    Which of the statements given above is/are correct?

    A)  1        

    B)         2 and 3

    C)  1 and 3           

    D)  1, 2 and 3

    Correct Answer: A

    Solution :

    [a] Several types of devices are used to improve the aesthetic qualities of the drinking water and to remove chemicals. Those the employ an activated carbon filter are the most common, and are usually installed at the point of use. Activated carbon filters are generally more effective in removing organic chemicals. They are often used to improve taste, smell and appearance and are frequently combined with other treatment processes to provide a more complete water treatment system.


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