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    Fardeen Rao Issac
    Fardeen Rao Issac
    Asked: 3 years agoIn:

    Abhishek lives in society flats alongwith his parents. He is studying in class IX. For the last few days, his mother has been complaning that the milk being supplied by the milkman is not pure. When she talked to other neighbours, they told her that they are also facing the same problem. Abhishek through over this problem for a while. He then went to the market and purchased a glass instrument to check the purity of milk being supplied by the milkman. when milkman brought milk the next day, Abhishek took this milk in a tall vessel and placed the instrument in it vertically. He explained to the milkman how this instrument indicated that the milk was not pure, it was adulterated. The milkman admitted his fault and promised to supply pure milk in future. Abhishek told about this incident to all his neighbours. Ultimately all the households in the society flats purchased the instrument to test the purity of milk.
    (a) Name the instrument which was purchased by Abhishek to check the purity of milk.
    (b) Name the principle on which the above instrument works.
    (c) What substance is usually mixed with pure milk by the dishonest milkmen to adulterate it and increase their profit?
    (d) Which physical quantity of pure milk is used to detect the presence of the substance mixed in it (which is measured by the above instrument)?
    (e) How does the instrument purchased by Abhishek show the presence of the substance mixed in pure milk by the milkman?
    (f) Which position of the instrument placed in two containers of milk A and B (one by one) shows (i) pure milk, and (ii) adulterated milk?
    (g) What values are displayed by Abhishek in this episode?
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