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Atoms and Molec...

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  • Question 1
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    The % of Copper and Oxygen in samples of CuO obtained by different methods were found to be the same. 

    This proves the law of:

  • Question 2
    1 / -0

    Which one of the following properties of an element is not variable?

  • Question 3
    1 / -0

    The value of the Avogadro constant is :

  • Question 4
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    Number of atoms in $$12$$ gm of  $$^{12}_6C$$ is:

  • Question 5
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    _________ is the smallest unit of matter which may or may not have an independent existence, but always takes part in a chemical reaction.

  • Question 6
    1 / -0

    The molecular mass of $$(NH_2)_2CO$$ is :

    (Given atomic mass of H = 1, O = 16, C = 12, N = 14.)

  • Question 7
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    An atom is different from its ion in:

  • Question 8
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    When two atoms combine to form molecule, then :

  • Question 9
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    Which of the following is a diatomic element?

  • Question 10
    1 / -0

    The molecular mass of $$Mg_3N_2$$ is ::

    Given atomic mass of $$(N = 14, Mg = 24.)$$

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