CHEMICAL EQUATION QUIZ Part II

1. Methane gas is burnt as a source of energy for cooking and heating. One molecule of methane gas and 2 molecules of oxygen gas react to form 1 molecule of carbon dioxide gas and 2 molecules of water. The correct equation is ….
a. CH4 + O2 --> CO2 + H2O
b. CH4 + 2O2 --> CO2 + 2H2O
c. CH4(g) + O2(g) --> CO2(g) + H2O(g)
d. CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)
e. CH4(g) + 2O2(g) --> CO2(g) + 2H2O(l)
2. Solid calcium carbonate is added to a solution of nitric acid to form carbon dioxide gas. The correct balanced equation is ….
a. CaCO3(s) + HNO2(aq) --> Ca(NO3)2(aq) + H2O(l) + CO2(g)
b. CaCO3(s) + 2HNO2(aq) --> Ca(NO3)2(aq) + H2O(l) + CO2(g)
c. CaCO3(s) + HNO3(aq) --> Ca(NO3)2(aq) + H2O(l) + CO2(g)
d. CaCO3(s) + 2HNO3(aq) --> Ca(NO3)2(aq) + H2(l) + CO2(g)
e. CaCO3(s) + 2HNO3(aq) --> Ca(NO3)2(aq) + H2O(l) + CO2(g)
3. Aluminium is added to a solution of hydrochloric acid to form a solution of alminium chloride and hydrogen gas. The correct balanced equation is ….
a. Al(s) + HCl(aq) --> AlCl(aq) + H(g)
b. Al(s)+2HCl(aq) --> AlCl2(aq)+H2(g)
c. 2Al(s)+6HCl(aq) --> 2AlCl3(aq)+ 3H2(g) V
d. Al2(s)+6HCl(aq) --> 2AlCl3(aq) + 3H2(g)
e. 2Al(s) + 6HCl(aq) --> 2AlCl3(aq) + 6H(g)
4. If an acid is added to a base and the reaction is heated, the compound formed is called ….
a. non-acid
b. non-base
c. salt
d. water
e. ionic compound
5. Iron is added to hydrochloric acid, form salt and a gas. The gas is ….
a. Oxygen
b. hydrogen
c. iron
d. chlorine
e. hydrogen chloride
6. Propane gas, C3H8 burns fully in oxygen gas. The ratio of molecules of propane, oxygen, carbon dioxide, and water are
a. 1, 5, 3, 4
b. 1, 4, 3, 5
c. 1, 3, 4, 5
d. 2, 3, 3, 5
e. 2, 5, 6, 8
7. Butane gas, C4H10 is also burnt as a source of energy. One molecule of butane gas reacts with oxygen gas to form carbon dioxide gas and water. The correct number of carbon dioxide molecules and water molecules are ….
a. 2 and 3
b. 2 and 5
c. 4 and 3
d. 4 and 5
e. 4 and 10
8. Pentane liquid, C5H12 burns fully in oxygen gas. The ratio of molecules of pentane, oxygen, carbon dioxide, and water are ….
a. 1, 11, 5, 6
b. 1, 8, 5, 6
c. 1, 5, 3, 4
d. 2, 5, 3, 5
e. 2, 10, 6, 8
9. Fossil fuels usually contain traces of sulfur. The poisonous gas formed when this fuel burns is ….
a. acid
b. sulfur
c. sulfur dioxide
d. sulfur trioxide
e. sulfurous acid
10. Propane, like methane, is a hydrocarbon which can be used as a fuel. It is sold as ‘bottled gas’, for use where there is no mains gas supply. When propane burns with sufficient oxygen, the products formed are ….
a. oxygen and water
b. oxygen and carbon dioxide
c. water and carbon dioxide
d. carbon dioxide and carbon monoxide
e. carbon monoxide and water