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Sodium metal reacts with water in a single-displacement reaction

Sodium metal reacts with water in a single-displacement reaction

Sodium metal reacts with water in a single-displacement reaction.  Which of the following best describes the identity of the products of this reaction?

A)NaH(aq) and O2(g)D)NaOH(aq) and H2(g)

B)NaH2(aq) and O(g)E)NaOH2(aq)

C)NaOH(aq) and H(g)

 

52.              What is the product of the combination reaction that occurs when magnesium metal reactions with oxygen gas?

A)  MgO2(s)    B)  MgO(s)    C)  Mg2O(s)    D)  Mg2O3(s)    E)  Mg2O2(s)

 

53.              What is the correct formula for the product of the combination reaction between calcium metal and oxygen gas?

A)  CaO(s)    B)  CaO2(s)    C)  Ca2O(s)    D)  Ca2O2(s)    E)  Ca2O3(s)

 

54.              What are the products of the combustion reaction of methane, CH4, with oxygen?

A)CO2(g) onlyD)CO2(g) and H2O(g)

B)CO(g) and H2(g)E)H2CO3(aq)

C)C(s), and H2O(g)

 

55.              Write and balance the equation for the decomposition reaction that occurs when Mercury(II) oxide decomposes to its elements.

A)2HgO(s)  ?  2Hg(l)  + O2(g)D)HgO2(s)  ?  Hg(l)  + 2O(g)

B)Hg2O(s)  ?  2Hg(l)  + O2(g)E)2Hg(l)  +O2(g) ? HgO2(s)

C)HgO(s)  ?  Hg(l)  + O2(g)

 

56.              When heated, calcium carbonate (limestone) undergoes a decomposition reaction.  Write a balanced equation for this reaction.

A)CaCO3(s) ?  Ca(s) + CO3(g)D)2CaCO3(s) ?  2CaO(s) + CO2(g)

B)CaCO3(s) ?  Ca(s) + CO2(g)E)2CaCO3(s) ?  2CaO(s) + 3CO2(g)

C)CaCO3(s) ?  CaO(s) + CO2(g)

 

57.              Write and balance the equation for the decomposition reaction that occurs when solid copper(II) hydroxide, Cu(OH)2, is heated.

A)Cu(OH)2(s) ?  Cu(s) + 2OH(g)D)Cu(OH)2(s) ?  CuO(s) + H2O(g)

B)Cu(OH)2(s) ?  Cu(s) + (OH)2(g)E)2Cu(OH)2(s) ?  2CuO(s) + H2O(g)

C)Cu(OH)2(s) ?  Cu(s) + H2O(g)

 

58.              Write and balance the equation for the decomposition reaction that occurs when solid magnesium sulfate trihydrate, MgSO4?3H2O, is heated.

A)MgSO4?3H2O(s) ? Mg(s) +  SO4?3H2O(s)

B)MgSO4?3H2O(s) ? MgSO4?3H2O(s)

C)MgSO4?3H2O(s) ? MgSO4(s)  + 3H2O(g)

D)MgSO4?3H2O(s) ? MgSO4(s)  + H2O(g)

E)MgSO4?3H2O(s) ? MgS(s)  + 6H2O(g)

 

59.              Write and balance the equation for the combination reaction that occurs when solid potassium metal reacts with chlorine gas.

A)K(s) + Cl(g) ? KCl(s)D)2K(s) + Cl2(g) ? 2KCl(s)

B)K(s) + Cl2(g) ? KCl(s)E)2K(s) + Cl2(g) ? 2ClK(s)

C)2K(s) + Cl2(g) ? KCl(s)

 

60.              Which of the following equations best describes the reaction that occurs when potassium metal reacts with oxygen gas in a combination reaction?

A)K(s)  +  O(g)  ?  KO(s)D)2K(s)  +  O(g)  ?  K2O(s)

B)K(s)  +  O2(g)  ?  KO2(s)E)K(s)  +  O2(g)  ?  KO(s)  + O(g)

C)4K(s)  +  O2(g)  ?  2K2O(s)

abhinav behal 15-Feb-2020

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