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Materials Metal...

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  • Question 1
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    On burning, metals react with oxygen to produce

  • Question 2
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    The constituents of which of the following alloys are lead and tin?

  • Question 3
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    Which of the following metals does not react with water or even with steam?

  • Question 4
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    Which of the following metals have low densities?

    a. Sodium
    b. Iron
    c. Potassium
    d. Copper

  • Question 5
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    Which of the following statements is/are false?

    a. The acidic, non-metal oxides turn blue litmus red.
    b. Sulphur and phosphorus are the non-metals that are used in fireworks.
    c. Non-metals react with dilute acids.

  • Question 6
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    Solution(s) of which of the following with water turn(s) red litmus blue?

    a. Magnesium oxide
    b. Sulphur dioxide
    c. Sodium oxide
    d. Carbon dioxide

  • Question 7
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    Which of the following elements is/are present in 22K gold?

  • Question 8
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    An apparatus was set up to determine the conditions essential for rusting of iron as shown below:


    Observe the image shown above and analyse which of the following statements is true:

    A) Rusting will take place only in test tube B.
    B) Rusting will take place both in test tubes A and B.
    C) Rusting will take place both in test tubes B and C.
    D) Rusting will take place only in test tube A.

  • Question 9
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    Riya's class teacher explained the physical properties of non-metals. According to her teacher, the non-metal that is in solid state and has lustre is

  • Question 10
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    Raju is a student of class VIII and is curious to know the chemical nature of metals. While testing the chemical nature of metals, he noticed that a metal oxide reacts with dilute solutions of both acids and bases to produce hydrogen gas. This metal oxide is

  • Question 11
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    While performing an experiment in chemistry lab, Ram prepares four solutions in test tubes 'A', 'B', 'C' and 'D', respectively. In test tube 'A', he adds copper sulphate solution. In test tube 'B', he adds zinc sulphate solution. In test tube 'C', he adds magnesium sulphate solution and in test tube 'D', he adds solution of calcium sulphate. After that, he adds iron nails in all test tubes. After some time, he notices that there is change in colour of solution in one of the test tubes. He observes the change in colour in which of the following test tubes and what is the changed colour?

  • Question 12
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    According to Sweta's class teacher, metals are good conductors of electricity and heat. She tells Sweta about a liquid metal that is used in thermometers to test body temperature. The name of that liquid metal is

  • Question 13
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    Which of the following properties of aluminium makes it useful to make parts of airplanes?

  • Question 14
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    Read the following statements and choose the correct answer.

    Statement I: Sulphur on reaction with oxygen forms sulphur dioxide, which dissolves in water to form sulphuric acid.
    Statement II: Sulphur is a non-metal that forms an acidic oxide, which turns blue litmus red.

  • Question 15
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    What are the constituents of stainless steel?

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