Self Studies

Physical and Ch...

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  • Question 1
    1 / -0

    Adding salt to water makes it salty. Which of the following is true regarding this change?

  • Question 2
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    The change given below is an example of :

    Hydrogen + Oxygen\text{Hydrogen + Oxygen} \longrightarrow Water\text {Water}

  • Question 3
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    Which of the following is true for ash, which is obtained by burning wood in the presence of oxygen?

  • Question 4
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    Which of the following is NOT a chemical change?

  • Question 5
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    Chemical changes are _____ .

  • Question 6
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    For rusting of iron to take place   _______  are required.

  • Question 7
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    Some pieces of chalk were taken and mixed with water. In this change, how many new substances are formed?

  • Question 8
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    Two changes are stated below:
    (i) A piece of magnesium gives of bright flames when burnt.
    (ii) A piece of iron glows red when heated strongly.

         Which of these is a chemical change?

  • Question 9
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    Adding sodium chloride to water is a:

  • Question 10
    1 / -0

    Two changes are stated below:
    (i.) A piece of magnesium gives of bright flames when burned.
    (ii). A piece of iron glows red when heated strongly.
    Which of these is a physical change?

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