Thursday, August 13, 2009

TEST-54-XI-[mole concept]

Q.3-
Which of the following contains maximum number of atoms?
[a] 2.0 g hydrogen
[b] 2.0 g oxygen
[c] 2.0 g nitrogen
[d] 2.0 g methane

6 comments:

  1. Ans : [D]
    Reason:Molecular formula of Methane is CH4
    Hence it contains 5 atoms & other contain two atoms

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  2. Answer : [D]
    Reason : Other contain only two atoms whereas methane contains 5 atoms.
    so.....

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  3. ans.a]2.0g of hydrogen
    2.0g of hydrogen=1 mole of hydrogen
    =Avogadro's no.of atoms
    23
    i.e-6.022*10 atoms

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  4. Q.3] ans D.
    as no of atoms in 1 mole of hydrogen, oxygen and nitrogen is 2 but about methane its 4.
    right????

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