1.

    Hydrogen and oxygen combine to form water (H2O). If 4g of hydrogen reacts completely with oxygen to form water, what mass of oxygen is required?

    A

    8g

    B

    16g

    C

    32g

    D

    64g

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Laws of Chemical Combination, Law of Conservation of Mass, Law of Definite Proportions

    Related Questions

    1.

    A student places a piece of metal X into a solution of ZnSO4ZnSO_4. No reaction is observed. The student then places a piece of metal X into a solution of CuSO4CuSO_4. A reaction occurs, and a reddish-brown solid forms. Where would metal X most likely be placed in the reactivity series?

    A

    Above Zn

    B

    Below Cu

    C

    Between Zn and Cu

    D

    Above both Zn and Cu

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    PYQ YEAR: 2021
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Chemical Reactions, Metal Displacement, Reactivity Series, Deductive Reasoning

    2.

    In which of the following reactions does zinc metal undergo displacement?

    A

    ZnO(s)+H2SO4(aq)β†’ZnSO4(aq)+H2O(l)ZnO(s) + H2SO4(aq) β†’ ZnSO4(aq) + H2O(l)

    B

    Zn(s)+CuSO4(aq)β†’ZnSO4(aq)+Cu(s)Zn(s) + CuSO4(aq) β†’ ZnSO4(aq) + Cu(s)

    C

    2Zn(s)+O2(g)β†’2ZnO(s)2Zn(s) + O2(g) β†’ 2ZnO(s)

    D

    ZnCO3(s)β†’ZnO(s)+CO2(g)ZnCO3(s) β†’ ZnO(s) + CO2(g)

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    PYQ YEAR: 2021
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Chemical Reactions, Metal Displacement, Reactivity Series

    3.

    Which metal, among Mg, Cu, Ag, and Au, would effectively displace copper from a copper sulfate solution?

    A

    Mg

    B

    Cu

    C

    Ag

    D

    Au

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    PYQ YEAR: 2021
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Chemical Reactions, Metal Displacement, Reactivity Series

    4.

    Which of the following reactions is the metal displacement reaction? Choose the right option.

    A

    Fe+2HCloFeCl2+H2↑Fe + 2HCl o FeC{l_2} + {H_2} \uparrow

    B

    2Pb(NO3)2o2PbO+4NO2+O2↑2Pb{(N{O_3})_2} o 2PbO + 4N{O_2} + {O_2} \uparrow

    C

    2KClO3β†’Ξ”2KCl+3O22KCl{O_3}\xrightarrow{\Delta }2KCl + 3{O_2}

    D

    Cr2O3+2Al→ΔAl2O3+2CrC{r_2}{O_3} + 2Al\xrightarrow{\Delta }A{l_2}{O_3} + 2Cr

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :metal displacement reaction, types of chemical reactions, reactivity series

    5.

    Which of the following reactions is the metal displacement reaction? Choose the right option.

    A

    Fe+2HCloFeCl2+H2↑Fe + 2HCl o FeC{l_2} + {H_2} \uparrow

    B

    2Pb(NO3)2o2PbO+4NO2+O2↑2Pb{(N{O_3})_2} o 2PbO + 4N{O_2} + {O_2} \uparrow

    C

    2KClO3β†’Ξ”2KCl+3O22KCl{O_3}\xrightarrow{\Delta }2KCl + 3{O_2}

    D

    Cr2O3+2Al→ΔAl2O3+2CrC{r_2}{O_3} + 2Al\xrightarrow{\Delta }A{l_2}{O_3} + 2Cr

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Some Basic Concepts in Chemistry
    🎯Topic:Laws Of Chemical Combinations
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :metal displacement reaction, redox reaction, reactivity series

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