Year 10 Science – Chemistry Consolidation
Name: _________________________________
Question 1.
For the following questions, identify the correct answer by circling either A, B, C or D.
Identify the equation that is correctly balanced:
Identify the reaction that is a combination reaction.
A. C2H6 + O2  CO2 + H2O
A. 2H2O  2H2 + O2
B. C2H6 + O2  2CO2 + 3H2O
B. 2H2+ O2  2H2O
C. C2H6 + 7O2  2CO2 + 3H2O
C. H2O2  H2 + O2
D. 2C2H6 + 7O2  4CO2 + 6H2O
D. H2O + Na  NaOH + H2
Identify the products of an acid + base reaction:
Identify the correct statement about compounds.
A. Metal salt + water
They are made of two or more:
A. Of the same element.
B. Metal salt + hydrogen
B. Atoms chemically bonded.
C. Metal salt + carbon dioxide + water
C. Molecules chemically bonded.
D. Metal salt + carbon dioxide + hydrogen
D. Different elements chemically bonded.
Identify the correct information about combustion
Identify the type of reaction for a metal reacting with
reactions:
water to produce a metal hydroxide and hydrogen:
A. Oxygen is a product
A. Combination reaction.
B. Carbon dioxide is a reactant.
B. Decomposition reaction.
C. Water is product.
C. Single displacement reaction.
D. Fuel is a product.
D. Double displacement reaction.
Question 2.
a) Define the term precipitate: _______________________________________________________________________
_______________________________________________________________________________________________
b) Identify the type of reaction in which a precipitate is produced. __________________________________________
Question 3.
Balance the following chemical equations.
a)
NaF 
Na +
b)
AgI +
Na2S 
c)
LiBr +
F2 
F2
Ag2S +
LiF +
NaI
Br2
d)
Al +
O2 
e)
NaBr +
Cl2 
NaCl +
Br2
f)
SiCl4 +
H2O 
SiO2 +
HCl
Al2O3
Question 4.
For the equations above, identify the type of reaction they represent.
a) ________________________________________
d) ________________________________________
b) ________________________________________
e) ________________________________________
c) ________________________________________
f) ________________________________________
Question 5.
The reactions below are all acid and metal reactions. Identify the products for each reaction.
a) magnesium + hydrochloric acid  __________________________________________________________________
b) zinc + sulfuric acid  ____________________________________________________________________________
c) calcium + nitric acid  ___________________________________________________________________________
d) iron + sulfuric acid  ____________________________________________________________________________
e) aluminium + hydrochloric acid  ___________________________________________________________________
Question 6.
Identify the number of atoms in each element for the following compounds:
Calcium carbonate (CaCO3)
Ca:
C:
O:
Sulfuric acid (H2SO4)
H:
S:
O:
Acetaldehyde (CH3CHO)
C:
H:
O:
Question 7.
Identify the missing parts of the chemical reactions:
a) 2Mg + ___________  2MgO
b) _________ + 2HCl  CaCl2 + H2
c) Cl2 + CaI2  CaCl2 + __________
d) 2NaN3  __________ + 3N2
e) K + NaCl  KCl + ___________
f)
2H2 + __________  2H2O
Question 8.
Explain the difference between a physical change and a chemical change. Provide an example of each.
__________________________________________________________________________________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
Question 9.
For the following descriptions, write the worded equation, including the products. The first one has been done for you.
Description of Reaction
Worded Equation
sodium metal reacts with chlorine gas
sodium + chlorine → sodium chloride
magnesium carbonate is heated strongly
iron + lead nitrate
ethanol was burned in oxygen
silver nitrate + sodium chloride
hydrogen gas reacts with chlorine gas
Question 10.
Identify the salt produced when:
a) Aluminium reacts with sulfuric acid _______________________________________
b) Potassium reacts with hydrochloric acid ___________________________________________
c) Calcium reacts with nitric acid ________________________________________
Question 11.
Write the chemical formula for a compound made up of:
1 nitrogen atom
Formula
2 silver atoms
4 hydrogen atoms
1 carbon atom
1 chlorine atom
3 oxygen atoms
Formula
1 zinc atom
1 sulfur atom
4 oxygen atoms
Formula
Question 12.
Explain why metals are more reactive as you move up the reactivity series of metals: ____________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
Question 13.
Identify the type of reaction based on the description.
Description of Reaction
zinc was added to hydrochloric acid producing bubbles and zinc chloride
methane + oxygen  carbon dioxide + water
Na2SO4 + BaCl2  BaSO4 + 2NaCl
copper carbonate was heated, producing copper oxide and carbon dioxide
2CO + O2 2CO2
Type of Reaction