1.

    Equal masses of oxygen and ozone are present in a container at 298 K. The ratio of their partial pressures (PO2:PO3P_{O_2} : P_{O_3}) is:

    A

    1:1

    B

    2:3

    C

    3:2

    D

    4:3

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Mole Concept, Partial Pressures, Dalton's Law

    Related Questions

    1.

    Which of the following contains the maximum number of water molecules?

    A

    18 moles of water

    B

    18 molecules of water

    C

    18 grams of water

    D

    18 g of O2O_2

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2015
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Mole Concept, Avogadro's Number

    2.

    Which of the following pair of gases contain the same number of molecules?

    A

    16gO2,14gN216{\rm{g}}{{\rm{O}}_2},14{\rm{g}}{{\rm{N}}_2}

    B

    8gO2,22gN28{\rm{g}}{{\rm{O}}_2},22{\rm{g}}{{\rm{N}}_2}

    C

    28gN2,22gCO228{\rm{g}}{{\rm{N}}_2},22{\rm{g C}}{{\rm{O}}_2}

    D

    32gO2,32gN232{\rm{g}}{{\rm{O}}_2},32{\rm{g}}{{\rm{N}}_2}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :moles, molar mass, Avogadro's number

    3.

    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

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :molar mass, moles, Avogadro's number, number of atoms in a molecule

    4.

    Volume occupied by 3.01imes1023    3.01 imes {10^{23}}\;\; molecules of acetylene at NTP is:

    A

    22.4  litre22.4\,\,{\rm{litre}}

    B

    11.2  litre11.2\,\,{\rm{litre}}

    C

    1.12  litre1.12\,\,{\rm{litre}}

    D

    2..24  litre2..24\,\,{\rm{litre}}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Mole concept, Avogadro's number, Molar volume at NTP

    5.

    If Avogadro's number were 6.022imes1015 mol−16.022 imes 10^{15} \, mol^{-1}, what would be the mass of one mole of water (H2_2O)? (Atomic masses: H = 1 u, O = 16 u)

    A

    18 g

    B

    1.8imes10−81.8 imes 10^{-8} g

    C

    18imes101518 imes 10^{15} g

    D

    Cannot be determined

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2015
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Mole Concept, Avogadro's Number, Molar Mass

    6.

    One mole of   CO2\;{\rm{C}}{{\rm{O}}_2} contains:

    A

    6.02imes1023atoms  of  C6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{C}}

    B

    6.02imes1023atoms  of  O6.02 imes {10^{23}}{\rm{atoms}}\;{\rm{of}}\;{\rm{O}}

    C

    3.01imes1023molecules  of  CO23.01 imes {10^{23}}molecules\;of\;C{O_2}

    D

    None of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :mole concept, Avogadro's number, chemical formula

    7.

    0.5 moles of water contains how many molecules?

    A

    6.022 x 10²³ molecules

    B

    1.204 x 10²⁴ molecules

    C

    3.011 x 10²³ molecules

    D

    1.505 x 10²³ molecules

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2015
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Mole Concept, Avogadro's Number

    8.

    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}}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Moles, Avogadro's number, Atomic weight, Number of atoms

    9.

    The number of atoms in 0.1 mole of a triatomic gas is:

    A

    6.022imes10226.022 imes 10^{22}

    B

    1.806imes10231.806 imes 10^{23}

    C

    6.022imes10236.022 imes 10^{23}

    D

    1.806imes10241.806 imes 10^{24}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Mole Concept, Avogadro's Number, Triatomic Gases

    10.

    The total number of electrons in 18 ml of water (density = 1/gml

    A

    6.023  imes  10256.023\,\, imes \,\,{10^{^{25}}}

    B

    6.023  imes  10246.023\,\, imes \,\,{10^{^{24}}}

    C

    6.023  imes 18  imes  10236.023\,\, imes \,18\,\, imes \,\,{10^{^{23}}}

    D

    6.023  imes  10236.023\,\, imes \,\,{10^{^{23}}}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :moles, molar mass, Avogadro's number, number of electrons per molecule

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