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Metals and Non-...

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  • Question 1
    1 / -0

    Read the statements given below and select the correct option.
    Statement - 1: Lemon pickle can be stored in an aluminium jar.
    Statement - 2: Aluminium jars enhance the storage life of a pickle.

  • Question 2
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    Identify materials 'X' and 'Y' in the figure given below.

  • Question 3
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    A metal piece is dropped in a test tube containing dilute H2SO4. When a burning matchstick is brought near the mouth of the test tube, a pop sound is heard. The sound is produced due to the

  • Question 4
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    Study the following table carefully and select the correct option.

    Material Reacts with dilute hydrochloric acid Reacts with dilute sulphuric acid
    X Yes Yes
    Y No No
    Z No No

  • Question 5
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    Study the following table carefully and select the correct option.

    Sample Conductor of electricity Malleability
    I √ X
    II X X
    III X √
    IV √ √

  • Question 6
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    Which of the following is the most appropriate order for the reactivity of metals towards mineral acids?

  • Question 7
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    Which of the following reactions cannot occur?

  • Question 8
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    Match column - I with column - II and select the correct option from the codes given below.

    Column - I Column - II
    (a) A non-metal essential for respiration (i) Carbon
    (b) A non-metal which is a source of energy in the sun (ii) Silicon
    (c) A non-metal which is a good conductor of electricity (iii) Oxygen
    (d) A non-metal used in semiconductors (iv) Hydrogen

  • Question 9
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    Match column - I with column - II and select the correct option from the codes given below.

    Column - I Column - II
    (a) Mercury (i) Acidic oxide
    (b) CO2 (ii) Liquid metal
    (c) Gold (iii) Basic oxide
    (d) MgO (iv) Malleable

  • Question 10
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    What will happen if you keep a solution of copper sulphate in an iron container for a few days? What is the reason for your observation?

  • Question 11
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    Lalita takes a burning substance and collects the evolved vapours in a test tube, making sure that they do not escape. A small amount of water is added to the test tube. To the solution obtained, a few drops of red litmus solution are added. The litmus solution turns blue. Which of the following could be the burning substance?

  • Question 12
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    Vidisha placed a copper wire in silver nitrate solution. After sometime, she noticed that the colour of the wire and the solution changed. What did she observe?

  • Question 13
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    An electrician said that proper wiring could be done due to a property of metals called ductility. What does the word 'ductile' mean?

  • Question 14
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    Read the following statements carefully and identify X, Y and Z, respectively.

    (i) X is stored under kerosene.
    (ii) Y catches fire on exposure to air and so, is stored in water.
    (iii) Z reacts slowly with water.

  • Question 15
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    A student investigated the reactivity of four metals; iron, copper, zinc and an unknown metal X. He arranged three experimental set-ups as shown in the diagram below.
    The student observes that reaction occurred in all the three experiments. Identify the metal X.

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