Question : 61.              Write and balance the equation for the combination reaction : 1335430

 

 

61.              Write and balance the equation for the combination reaction that occurs when sulfur dioxide gas, SO2, reacts with oxygen gas.

A)SO2(g) + O2(g) ? SO4(g)D)2SO2(g) + 2O2(g) ? 2SO3(g)

B)SO2(g) + O2(g) ? SO3(g)E)3SO2(g) + 2O2(g) ? 3SO3(g)

C)2SO2(g) + O2(g) ? 2SO3(g)

 

62.              Write and balance the equation for the combination reaction that occurs when aluminum metal reacts with oxygen gas.

A)Al(s) + O2(g) ? AlO(s)D)2Al(s) + 2O2(g) ? Al2O3(s)

B)Al(s) + O2(g) ? AlO2(s)E)4Al(s) + 3O2(g) ? 2Al2O3(s)

C)2Al(s) + 2O2(g) ? 2AlO2(s)

 

63.              When zinc metal is placed into a copper(II) nitrate solution, a single-displacement reaction occurs.  Write a balanced equation to describe this reaction.

A)Zn(s) + Cu(NO3)2(aq) ? ZnNO3(aq) + CuNO3(aq)

B)Zn(s) + Cu2NO3(aq) ? ZnNO3(aq) + Cu(aq)

C)Zn(s) + Cu(NO3)2(aq) ? Zn(NO3)2(aq) + Cu(s)

D)2Zn(s) + Cu(NO3)2(aq) ? 2Zn(NO3)2(aq) + Cu(s)

E)Zn(s) + Cu2NO3(aq) ? ZnNO3(aq) + 2Cu(aq)

 

64.              When copper metal is placed into a silver nitrate solution, a single-displacement reaction occurs, forming a copper(II) compound.  Write a balanced equation to describe this reaction.

A)Cu(s) + Ag(NO3)2(aq) ? CuNO3(aq) + AgNO3(aq)

B)Cu(s) + AgNO3(aq) ? CuNO3(aq) + Ag(aq)

C)Cu(s) + Ag(NO3)2(aq) ? Cu(NO3)2(aq) + Ag(s)

D)2Cu(s) + Ag(NO3)2(aq) ? 2Cu(NO3)2(aq) + Ag(s)

E)Cu(s) + 2AgNO3(aq) ? Cu(NO3)2(aq) + 2Ag(s)

 

65.              When calcium metal is placed in water, a single-displacement reaction occurs.  Write a balanced equation to describe this reaction.

A)Ca(s) + H2O(l) ? CaO(aq) + H2(g)

B)Ca(s) + H2O(l) ? CaO(s) + H2(g)

C)Ca(s) + H2O(l) ? Ca(OH)2(aq) + H2(g)

D)Ca(s) + 2H2O(l) ? Ca(OH)2(aq) + H2(g)

E)2Ca(s) + 2H2O(l) ? 2Ca(OH)2(aq) + H2(g)

 

66.              Predict which of the following reactions will occur?

(i)   Ni(s)  +  FeCl2(aq)  ?  NiCl2(aq)  +  Fe(s)

(ii)  2Al(s)  +  3NiCl2(aq)  ?  2AlCl3(aq)  +  3Ni(s)

(ii)  Fe(s)  +  CuCl2(aq)  ?  FeCl2(aq)  +  Cu(s)

A)  i only    B)  ii only    C)  iii only    D)  ii and iii    E)  All three will occur.

 

67.              Which of the metals (Fe, Zn, Mg) will react in an aqueous solution of Al(NO3)3 to produce aluminum metal?

A)  Fe    B)  Zn    C)  Mg    D)  All of these    E)  None of these

 

68.              When potassium metal is placed in water, will a reaction occur?  If so, what is the balanced equation for the reaction?

A)No reaction will occur.

B)Yes.  2K(s) + 2H2O(l) ? 2K(OH)2(aq) + H2(g)

C)Yes.  2K(s) + 2H2O(l) ? 2KOH(aq) + H2(g)

D)Yes.  2K(s) + 2H2O(l) ? 2KH2O(aq)

E)Yes.  2K(s) + 2H2O(l) ? 2KOH(aq) + 2H2(g)

 

69.              When iron metal is placed into a solution of hydrochloric acid, will a reaction occur?  If so, what is the balanced equation for the reaction?

A)No reaction will occur.

B)Yes.  2Fe(s) + 2HCl(aq) ? 2FeCl(aq) + H2(g)

C)Yes.  Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g)

D)Yes.  Fe(s) + 3HCl(aq) ? FeCl3(aq) + H2(g)

 

70.              When copper metal is placed in a solution of zinc nitrate, will a reaction occur?  If so, what is the balanced equation for the reaction?

A)Yes.  Cu(s) + Zn(NO3)2(aq) ? CuNO3(aq) + ZnNO3(aq)

B)Yes.  Cu(s) + Zn2NO3(aq) ? CuNO3(aq) + Zn(aq)

C)Yes.  Cu(s) + Zn(NO3)2(aq) ? Cu(NO3)2(aq) + Zn(s)

D)No reaction will occur.

E)Yes.  Cu(s) + Zn2NO3(aq) ? CuNO3(aq) + 2Zn(aq)

 

 

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