9th Class Science Matter in Our Surroundings Question Bank Matter in our Surroundings

  • question_answer
    A class teacher demonstrates the effect of impurities on the boiling point of water using the arrangement of apparatus as shown below. What could be the probable thermometer readings recorded during the experiment?

    A) \[{{97}^{o}}C\]          

    B)        \[{{100}^{o}}C\]

    C) \[{{102}^{o}}C\]          

    D)        \[{{99}^{o}}C\]

    Correct Answer: C

    Solution :

     On addition of soluble impurities, the boiling point of water is increased. Boiling point of pure water is\[{{100}^{o}}C\]. In this case, it is above\[{{100}^{o}}C\]i.e.\[,\]\[{{102}^{o}}C\].


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