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6th Class Science Sorting Materials into Groups Question Bank Sorting and Separation of Materials

  • question_answer
    Four rods of equal length and thickness but of different materials are coated with wax in the same manner. They are fixed to a trough containing hot water. The given diagram illustrates what happens to the wax on each rod after five minutes.
     
     What can you conclude from the given diagram?
                             
    (i) The aluminium rod conducts heat better than the brass rod.         
    (ii) The aluminium rod conducts heat better than the copper rod.         
    (iii) The glass rod conducts heat better than the copper rod.
    (iv) The wax on the copper rod melts faster than the wax on the brass rod.
     

    A) (i) and (iv)

    B) (ii) and (iii)

    C) (i), (ii) and (iii)

    D) (ii), (iii) and (iv)

    Correct Answer: A

    Solution :

    By observing the amount of wax melted in each case in the figure, we can conclude about the conductivity of the rods. As the wax melted maximum on copper rod, it is a good conductor of heat followed by aluminium and brass. Glass is an insulator.


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