Chemistry 11 SCH3U3/6 Chapter 4 Practice Test
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Name__________________
Please answer the multiple choice on the Scantron sheet provided starting at # 41: (7 marks)
41. Aqueous solutions of two fictitious ionic compounds, X2Y and ZW2, react in a double displacement
reaction. What are the products?
A)
XW and ZY
B)
X2W and ZY
C)
XW and ZY2
D) X2Z and YW2
42. Consider the following double displacement reaction:
sodium hydroxide (aq) + phosphoric acid (aq) → water(l) + sodium phosphate(aq)
.What are the coefficients in the balanced equation?
A)
1, 2, 1, 2
B)
3, 1, 3, 1
C)
2, 1, 2, 1
D) 3, 1, 1, 3
43. A metal reacts with an ionic compound in a single displacement or substitution reaction. What does the
metal atom replace?
A)
the anion
B)
the cation
C)
either the anion or the cation
D) the less electronegative atom
44. Which metals are most likely to be found uncombined in nature?
A)
the metals in Groups 1 and 2 of the periodic table
B)
the metals in the middle of the activity series
C)
the metals in the centre part of the periodic table
D)
the metals in Periods 2 and 3
45. When the following skeleton equation is correctly balanced, what is the coefficient in front of silicon
tetrachloride?
C6H5Cl(l) + SiCl4(l) + Na(s) → (C6H5)4Si(l) + NaCl(s)
A)
1
B)
2
C)
4
D) 6
46.
According to the activity series for metals, which three elements are correctly listed in order of
decreasing reactivity?
A)
Hg, Cu, Pt
B)
Mn, Fe, Pb
C)
Al, Ca, Li
D)
Sn, Fe, H2
47. Which element will react with both dilute hydrochloric acid and water to release H 2 gas?
A)
Ca
B)
Pb
C)
Pt
D)
Ni
Please answer all questions on the paper provided.
1. Write balanced chemical equations for the following:
a)
The element tungsten is found in tungsten(VI) oxide. It can be recovered by roasting tungsten(VI)
oxide in the presence of hydrogen gas forming water and the element. ( 5)
b) Nitric acid reacts to form nitrogen dioxide, water and oxygen gas. ( 5)
c)
Butane ( C4H10) combines with oxygen to form carbon dioxide and water ( 5)
d) Heating ammonium nitrate forms dinitrogen oxide and water ( 4)
e)
Phosphorus trichloride when added to water produces phosphorous acid and hydrochloric acid (5)
f)
Magnesium nitride reacts with water to form magnesium oxide and ammonia gas ( 5)
2. In each case, predict the type of reaction that will occur. Otherwise indicate by writing NR (no reaction).
(10 marks)
a)
CuNO3(aq) + BaCl2(aq) 
c) NH4NO3(aq) + KOH(aq) 
e)
HgO(s)

________
g) Br2(l) + CaCl2(aq) 
i) Pt(s) + Cl2(g) 
3.Write balanced chemical equations for 2f, k, and i ( 6 marks)
b) HNO3(aq) + Ca(OH)2(aq) 
d) Pb(s)+ CuCl2(aq) 
f) C3H8(g) + limited O2(g) 
h) CuO(s) + H2(g) 
j) NaNO3(aq) + Ag(s) 
4. Predict the result of mixing each of the following pairs of solutions. Write NR if no reaction takes
place. Write a balanced chemical equation if a reaction occurs. ( 8 marks)
a)
b)
c)
d)
potassium carbonate and iron (ii) nitrate
sodium nitrate and copper (ii) sulphate
ammonium iodide and silver nitrate
lead (ii) nitrate and potassium bromide
5. Balance the following: ( 2 marks)
B + SiO2

Si + B2O3
Part B Short Answer
1. Copper is commonly found in nature in the compound CuFeS2. It is extracted by roasting CuFeS2 in air.
This reaction can be summarized by the following equation:
CuFeS2(s) + O2(g)  Cu(s) + FeO(s) + SO2(g)
a)
Balance the equation. Can the reaction be classed as a single displacement reaction? Give a reason
for your answer. ( 3 marks)
2. A solution of hydrochloric acid will undergo double displacement reactions with sulfides and with
carbonates to produce two distinctively different gases. This fact can be used to distinguish between
samples of nickel(II) sulfide and nickel(II) carbonate. Write the balanced equation for each reaction. Name
the gas that is produced, and give one characteristic that can be used to identify it. (6 marks)
3. Using one example for each, explain why synthesis and combustion are such important reactions in our
world. ( 4 marks)
4. A red compound was heated and the two products were collected. The gaseous product caused a glowing
splint to glow brightly. The other product was a shiny pure metal, which is liquid at room temperature.
Write the most likely reaction that would explain these observations, using the most common valencies. ( 2
marks)
5. Explain how the activity series of metals could be used to determine:
a) How metals could be extracted from their ores. ( 2)
b) The uses of metals ( 2)
Bonus: Magnesium carbide will react with water in a double displacement reaction. Write the balanced
equation for this reaction. ( 3 marks)
Chapter 4 test answers
Section B
2. Ans:
WO3(s) + 3H2(g) W(s) + 3H2O(g) single displacement reaction
4HNO3(aq)  4NO2(g) + 2H2O(l) + O2(g) decomposition reaction
aqueous nitric acid ® gaseous nitrogen dioxide + liquid water + oxygen gas
Ans:
2HCl(aq) + NiS(s)  H2S(g) + NiCl2(aq)
H2S is hydrogen sulfide gas, which has a rotten egg odour.
2HCl(aq) + NiCO3(s) ® CO2(g) + H2O(l) + NiCl2(aq)
CO2 is carbon dioxide gas, which is odourless.
Ans:
a) double displacement
b) neutralization, double displacement
c) double displacement
d) single displacement
e) decomposition
f)
g) no reaction
h) single displacement
i) synthesis
j) no reaction
k)
l) double displacement
m) incomplete combustion
Ans:
Mg2C(s) + 4 H2O(l) ® CH4(g) + 2Mg(OH)2(aq)