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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Colloids Emulsion, Gel and Their properties with application

  • question_answer
    Alum is a water purifier because it           [KCET 2005]

    A)                 Coagulates the impurities                           

    B)                 Softens hard water

    C)                 Gives taste

    D)                 Destroys the pathogenic bacteria

    Correct Answer: A

    Solution :

                    Alum contains many cations and water has many anionic impurities. On adding alum coagulates the suspended impurities and make water fit for drinking purposes.


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