PYQ Vault

Day 34: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

  1. Question 1

    Magnetic Effects of Electric Current. Asked 2 times: 2022*, 2024 (* = numbers or wording changed that year)

    32
    A student fixes a sheet of white paper on a drawing board. He places a bar magnet in the centre of it. He sprinkles some iron filings uniformly around the bar magnet. Then he taps the drawing board gently and observes that the iron filings arrange themselves in a particular pattern. (a) Why do iron filings arrange in a particular pattern ? (b) What does the crowding of iron filings at the ends of the magnet indicate ? (c) What do the lines, along which the iron filings align, represent ? (d) If the student places a cardboard horizontally in a current carrying solenoid and repeats the above activity, in what pattern would the iron filings arrange ? State the conclusion drawn about the magnetic field based on the observed pattern of the lines.

  2. Question 2

    Metals and Non-metals. Asked 2 times: 2023*, 2024 (* = numbers or wording changed that year)

    5
    A metal ‘X’ is used in thermit process. When ‘X’ is heated with oxygen, it gives an oxide ‘Y’, which is amphoteric in nature. ‘X’ and ‘Y’ respectively are :

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  3. Question 3

    Metals and Non-metals. Asked 2 times: 2023*, 2024 (* = numbers or wording changed that year)

    Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
    17
    Assertion (A) : Carbon reduces the oxides of Sodium and Magnesium. Reason (R) : Sodium and Magnesium have more affinity for Oxygen than Carbon.

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  4. Question 4

    Metals and Non-metals. Asked 2 times: 2023*, 2024 (* = numbers or wording changed that year)

    5
    Which of the following is an alloy of copper and tin ?

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  5. Question 5

    Our Environment. Asked 2 times: 2023*, 2024 (* = numbers or wording changed that year)

    33
    Differentiate between biodegradable and non-biodegradable wastes. We generate a lot of non-biodegradable wastes in our daily life. Write any two harmful effects caused by these wastes if not disposed off properly.