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  1. Asked: In:

    Which of the following statement is correct about constituents of white light based on above observations?

    Best Answer
    Arusi

    [A] White light consists of seven colours. When the light disperses, various bands of light are clearly visible with White light consists of seven colours.

    [A] White light consists of seven colours.
    When the light disperses, various bands of light are clearly visible with White light consists of seven colours.

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  2. Asked: In:

    What happens when copper rod is dipped in iron sulphate solution?

    Best Answer
    Arusi

    [D] Only (iv) Iron is more reactive than copper. Hence, Cu will not displace iron from iron sulphate and no reaction will take place.

    [D] Only (iv)
    Iron is more reactive than copper. Hence, Cu will not displace iron from iron sulphate and no reaction will take place.

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  3. Asked: In:

    What will happen, when silver chloride is placed in sunlight for some time?

    Arusi

    [C] both [A] and [B] takes place

    [C] both [A] and [B] takes place

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  4. Asked: In:

    Identify “X” and “Y” in the following reaction: Cu + “x” HNO₃ → Cu(NO₃)₂ + “y” NO₂ + 2H₂O

    Best Answer
    Arusi

    [A] 4 and 2 By equating the number of atoms both sides, the balanced equation will be: Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O

    [A] 4 and 2
    By equating the number of atoms both sides, the balanced equation will be:
    Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O

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  6. Asked: In:

    A faster moving body has greater momentum than a slower one irrespective of their masses.

    Arusi

    [B] False

    [B] False

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  7. Asked: In:

    The covering of the cell that separates the content of the cell from its external environment is called:

    Arusi

    [C] Cell membrane

    [C] Cell membrane

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  8. Asked: In:

    The term “protoplasm” was coined by

    Arusi

    [A] Purkinje

    [A] Purkinje

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  9. Asked: In:

    A probe which is a molecule used to locate specific sequences in a mixture of DNA or RNA molecules could be:

    Arusi

    c. Either RNA or DNA

    c. Either RNA or DNA

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  11. Asked: In:

    GEAC stands for:

    Arusi

    c. Genetic Engineering Approval Committee

    c. Genetic Engineering Approval Committee

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  12. Asked: In:

    Bt cotton is not:

    Arusi

    d. Resistant to all pesticides

    d. Resistant to all pesticides

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