1.

    2.24 L of a gas at STP weighs 3.2 g. The molecular weight of the gas is:

    A

    16 g/mol

    B

    32 g/mol

    C

    64 g/mol

    D

    128 g/mol

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Mole Concept, STP, Molar Volume

    Related Questions

    1.

    Oxygen and the oxide ion have the

    A

    Same proton number

    B

    Same electronic configuration

    C

    Same electron number

    D

    Same size

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :atomic structure, ions, protons, electrons

    2.

    26 mL26\,{\rm{mL}} of CO2{\rm{C}}{{\rm{O}}_2} are passed over hot coke. The maximum volume of CO formed is :

    A

    15 mL15\,{\rm{mL}}

    B

    10 mL10\,{\rm{mL}}

    C

    32 mL32\,{\rm{mL}}

    D

    52 mL52\,{\rm{mL}}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :stoichiometry, gas laws

    3.

    The number of Na atoms in 46 g β€˜Na”

    A

    6.023{\mkern 1mu} {\mkern 1mu}  imes {\mkern 1mu} {\mkern 1mu} {10^{23}}

    B

    2

    C

    1

    D

    12.046{\mkern 1mu} {\mkern 1mu}  imes {\mkern 1mu} {\mkern 1mu} {10^{23}}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Moles, Avogadro's Number, Atomic Mass

    4.

    What is the mass of the precipitate formed when 50 mL of 16.9% solution of \AgNO3\AgNO_3 is mixed with 50 mL of 5.8% NaCl solution?

    A

    7.175 g

    B

    14.35 g

    C

    3.587 g

    D

    10.76 g

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2015
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Stoichiometry, Limiting Reagent, Precipitation Reactions

    5.

    The relation between molecular weight (M)\left( M \right) and vapour density (VD)\left( VD \right) is:

    A

    M=2.5imesVDM = 2.5 imes {\rm{VD}}

    B

    M=2imesVDM = 2 imes {\rm{VD}}

    C

    M=0.5imesVDM = 0.5 imes {\rm{VD}}

    D

    M=VDM = {\rm{VD}}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Molecular weight, Vapour density

    6.

    10g of which of the following substances contains the greatest number of atoms?

    A

    He

    B

    Ne

    C

    H2H_2

    D

    O2O_2

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2024
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Mole Concept, Stoichiometry

    7.

    Suppose the elements X and Y combine to form two compounds XY2X{Y_2} and X3Y2{X_3}{Y_2}. When 0.1 mole of XY2X{Y_2} weights 10 g and 0.05 mole of X3Y2{X_3}{Y_2} weights 9 g, the atomic weights of X and Y are

    A

    30,20

    B

    40,30

    C

    60,40

    D

    20,30

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :molar mass, stoichiometry, simultaneous equations

    8.

    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
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Mole Concept, Avogadro's Number, Triatomic Gases

    9.

    Oxygen and the oxide ion have the

    A

    Same proton number

    B

    Same electronic configuration

    C

    Same electron number

    D

    Same size

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :atomic structure, ions, protons, electrons

    10.

    Which of the following contains the greatest number of atoms?

    A

    1 g of Li

    B

    1 g of Ag

    C

    1 g of Mg

    D

    1 g of O2

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Mole Concept, Atomic Mass

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