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    3.

    Which one of the followings has maximum number of atoms ?

    A

    1  g{\rm{1}}\,\,{\rm{g}}of Ag (s){\rm{Ag}}\,\left( {\rm{s}} \right) [ Atomic mass of Ag=108Ag = {\rm{ }}108 ]

    B

    1  g{\rm{1}}\,\,{\rm{g}} of Mg (s){\rm{Mg}}\,\left( {\rm{s}} \right) [ Atomic mass of Mg=24Mg = {\rm{ }}24 ]

    C

    1  g{\rm{1}}\,\,{\rm{g}} of O2(g){{\rm{O}}_{\rm{2}}}\left( {\rm{g}} \right) [ Atomic mass of O=16O = {\rm{ 16}} ]

    D

    1  g{\rm{1}}\,\,{\rm{g}} of Li (s){\rm{Li}}\,\left( {\rm{s}} \right) [ Atomic mass of Li=7Li = {\rm{ 7}} ]

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    4.

    In which case is the number of molecules of water maximum ?

    A

     10βˆ’3 mol  of water\,{\rm{1}}{{\rm{0}}^{{\rm{ - 3}}}}\,{\rm{mol}}\,\,{\rm{of}}\,{\rm{water}}

    B

    18 mL of water{\rm{18}}\,{\rm{mL}}\,{\rm{of}}\,{\rm{water}}

    C

     0.00224 L  of water vapours  at1atm and 273  K\,{\rm{0}}{\rm{.00224}}\,{\rm{L}}\,\,{\rm{of}}\,{\rm{water}}\,{\rm{vapours}}\,\,{\rm{at 1 atm }}\,{\rm{and }}\,{\rm{273}}\,\,{\rm{K}}

    D

    0.18  g  of  water{\rm{0}}{\rm{.18}}\,\,{\rm{g}}\,\,{\rm{of}}\,\,{\rm{water}}

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    5.

    Maximum no. of atoms are present in

    A

    8g CH48g\,C{H_4}

    B

    8g C6H12O68g\,{C_6}{H_{12}}{O_6}

    C

    25g CaCO325g\,CaC{O_3}

    D

    28g CO28g\,CO

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    7.

    Which of the following samples contain the least number of atoms

    A

    1g  of CO2(g)1g\,\,of\,C{O_2}\left( g \right)

    B

    1g of C8H18(l)1g\,of\,{C_8}{H_{18}}\left( l \right)

    C

    1g of C2H6(g)1g\,of\,{C_2}{H_6}\left( g \right)

    D

    1g of LiF(s)1g\,of\,LiF\left( s \right)

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    10.

    Number of atoms in 558.5 g of Fe is (at . wt = 55.85)

    A

    Twice that in 60 g carbon

    B

    6.023imes10226.023 imes {10^{22}}

    C

    Half in 8 gr of He

    D

    558.5imes6.023imes1023558.5 imes 6.023 imes {10^{23}}

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