CHEMICAL EQUATION QUIZ Part I

1.Heated calcium burns in chlorine to form salt. The correct word equation is ….
a.calcium + chlorine --> calcium chlorine
b.calcium + chlorine --> calcium chloride
c.calcium(s) + chlorine(g) --> calcium chlorine(s)
d.calcium(s) + chlorine(g) --> calcium chloride(g)
e.calcium(s) + chlorine(g) --> calcium chloride(s)
2.Aluminium (group IIIA) reacts rapidly with fluorine (group VIIA) to form aluminium fluoride. The correct formula of the product is ….
a.AlF(s)
b.AlF2(s)
c.AlF3(s)
d.Al3F(s)
e.Al2F(s)
3.Balance the following equation. What is the sum of the coefficients of the reactants and products?
C3H8O2 + O2 --> CO2 + H2O
a.17
b.15
c.12
d.10
e.9
4.Balance the following equation. What is the sum of the coefficients of the reactants?
C6H8O6 + 2 --> CO2 + H2O
a.16
b.15
c.10
d.6
e.5
5.Balance the following equation. What is the sum of the coefficients of the reactants?
C12H22O11 + O2 --> CO2 + H2O
a.7
b.9
c.10
d.12
e.13
6.Balance the following equation. What is the sum of the coefficients of the products?
C + HNO3 --> NO2 + H2O + CO2
a.4
b.5
c.6
d.7
e.9
7.Balance the following equation and choose the quantity which is the sum of the coefficients of the reactants and products.
P2H4 --> PH3 + P4
a.9
b.12
c.14
d.15
e.16
8.Balance the following equation and choose the quantity which is the sum of the coefficients of the reactants and products.
CuSO4 + KI --> CuI + I2 + K2SO4
a.13
b.12
c.11
d.10
e.9
9.Balance the following equation and choose the quantity which is the sum of the coefficients of the products.
SnS2 + HCl --> H2SnCl6 + H2S
a.8
b.7
c.6
d.5
e.3
10.Balance the following equation and choose the quantity which is the sum of the coefficients of the products.
CS2 + Cl2 --> CCl4 + S2Cl2
a.6
b.5
c.4
d.3
e.2
11.Balance the following equation and choose the quantity which is the sum of the coefficients of the reactants and products.
I2 + Na2S2O3 --> Na2S4O6 + NaI
a.8
b.4
c.6
d.5
e.9
12.Potassium, with atomic number 19, reacts rapidly with fluorine to form potassium fluoride. The correct answer of the balanced equation is ….
a.K(s) + 3F(g) --> KF3(s)
b.K(s) + F2(g) --> KF2(s)
c.2K(s) + F2(g) --> 2KF(s)
d.K(s) + F(g) --> KF(s)
e.K2(s) + F2(g) --> 2KF(s)
13.The correct answer about the balanced chemical equation of forming aluminium oxide is ….
a.2Al(s) + O(g) --> Al2O(s)
b.Al(s) + O(g) --> AlO(s)
c.2Al(s) + O2(g) --> 2AlO(s)
d.4Al(s) + 3O2(g) --> 2Al2O3(s)
e.2Al2(s) + 3O2(g) --> 2Al2O3(s)
14.One of the following equations is incorrectly balanced. The equation is ….
a.N2(g) + 3H2(g) --> 2NH3(g)
b.2Fe(s) + 3O2(g) --> 2Fe2O3(s)
c.Ca(s)+2HCl(aq)-->CaCl2(aq)+H2(g)
d.3Mg(s) + N2(g) --> Mg3N2(s)
e.2H2(g) + O2(g) --> 2H2O(l)
15.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)