Mole Concept

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  • Q1

    Mass of one oxygen atom is

    Marks:1
    Answer:

    2.65×10–23 g

    Explanation:

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  • Q2

    Number of hydrogen atoms present in 1 mole of sulphuric acid and sulfurous acid are (X) and (Y) respectively. Relationship between X and Y is

    Marks:1
    Answer:

    X=Y

    Explanation:

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  • Q3

    Choose the correct statement from the following:

    Marks:1
    Answer:

    Avogadro’s number is the number of atoms present in 12 g of C–12 isotope.

    Explanation:

    Avogadro’s number is the number of atoms present in 12 g of C–12 isotope.

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  • Q4

    One mole of water molecule contains

    Marks:1
    Answer:

    6.022×1023 molecules.

    Explanation:

    1 mole of water molecule contains 6.022×1023 molecules of water and weighs 18g.

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  • Q5

    6.022×1023 moles contain

    Marks:1
    Answer:

    (6.022×1023)2 particles.

    Explanation:

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