1.

    Elements X and Y form compounds XY2XY_2 and X3Y2X_3Y_2. If 20 g of XY2XY_2 contains 0.2 moles and 18 g of X3Y2X_3Y_2 contains 0.1 moles. What are the atomic weights of elements X and Y?

    A

    X = 20, Y = 40

    B

    X = 30, Y = 35

    C

    X = 40, Y = 30

    D

    X = 50, Y = 25

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Mole Concept
    PYQ YEAR: 2016
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :law of multiple proportions, stoichiometry

    Related Questions

    1.

    13.5 g aluminium changes to Al3+ion{\rm{A}}{{\rm{l}}^{3 + }}ion in solution by losing :

    A

    18imes102318 imes {10^{23}} electrons

    B

    6.023imes10236.023 imes {10^{23}} electrons

    C

    3.01imes10233.01 imes {10^{23}} electrons

    D

    9imes10239 imes {10^{23}} electrons

    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, atomic mass, ionization, electron count, avogadro's number

    2.

    13.5 g aluminium changes to Al3+ion{\rm{A}}{{\rm{l}}^{3 + }}ion in solution by losing :

    A

    18imes102318 imes {10^{23}} electrons

    B

    6.023imes10236.023 imes {10^{23}} electrons

    C

    3.01imes10233.01 imes {10^{23}} electrons

    D

    9imes10239 imes {10^{23}} electrons

    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, atomic mass, Avogadro's number, ionization

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