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Physical and Ch...

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  • Question 1
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    Which of the following is a chemical change:

  • Question 2
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    Corrosion is a chemical reaction that involves :

  • Question 3
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    Rusting is a special term, given to the corrosion of which metal?

  • Question 4
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    Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

  • Question 5
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    Which of the following are chemical changes?
    (i) Melting of iron metal
    (ii) Rusting of iron
    (iii) Bending of an iron rod
    (iv) Drawing a wire of iron metal

  • Question 6
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    Classify the following as physical or chemical change.

    Metallic sodium is soft enough to be cut with a knife.

  • Question 7
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    Classify the following as physical or chemical properties.
    Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.

  • Question 8
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    Which of the following is not a physical change?

  • Question 9
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    A change in the physical state can be brought about:

  • Question 10
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    Assertion: Physical change of a substance involves a change in all properties and composition of its molecules.
    Reason: The change of a substance with alteration of the composition of its molecules without any change in its specific property is called physical change.


    Read the above assertion and reason and choose the correct option from the following.

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