WorksheetsAQA Trilogy Science: Chemical Changes
Total questions: 26
Worksheet time: 13mins
In the reactivity series which of the following is the most reactive element?
Copper
Zinc
Calcium
Potassium
In the following chemical reaction what will the products be?
Copper Sulfate + Iron -->
Copper Sulfide + Iron
Iron Sulfide + Copper
Iron Sulfate + Copper
Copper Sulfate + Iron
In a displacement reaction it is the ____________ reactive metal that is displaced from a compound?
Least
Most
Shiniest
Heaviest
What is the correct charge on a Magnesium ion
Mg2+
Mg2-
Mg+
Mg-
In the term OILRIG, what is meant if a substance is oxidised?
An atom gain electrons
An atom loses electrons
An atom gains neutrons
An atom loses neutrons
Which of the following ions is produced when acids dissolve in water?
H+
H-
OH+
OH-
Which of the following ions is produced when alkalis dissolve in water?
H+
H-
OH-
OH+
Which of the following is the best definition of a strong acid?
An acid that fully dissociates into its ions.
An acid the partially dissociates into its ions.
An acid that does not dissociate into ions.
Which of the following is the best definition for a weak acid?
An acid that fully dissociates into its ions.
An acid that partially dissociates into its ions.
An acid that does not dissociate into its ions.
What is the best way to extract metals that are less reactive than Carbon?
Reduction reaction
Electrolysis
Phytomining
Bioleaching
How can we extract metals that are higher than Carbon in the reactivity series?
Reduction reaction
Electrolysis
Phytomining
Bioleaching
In the diagram, which electrode is the anode?
Left
Right
What is the charge on a Cation?
Positive
Negative
What is the charge on an anion?
Positive
Negative
Which of the following is the best statement to describe what happens to ions during electrolysis?
Positive Cations will move to the Negative Cathode.
Positive Cations will move to the Positive Cathode.
Negative Cations will move to the positive Cathode
Negative Cations will move the negative Cathode
During the electrolysis of Brine Water (NaCl(aq)) what product will be formed at the cathode?
Na(s)
Cl2(g)
H2(g)
O2(g)
When an acid and alkali react together this is known as a ___________ reactiion.
Combustion
Displacement
Neutralisation
Endothermic
What are the products of a neutralisation reaction?
Salt and Hydrogen
Salt and Water
Excess acid and Hydrogen
Excess alkali and Oxygen
Which acid could be used to form Mg(NO3)2 in a metal and acid reaction?
Hydrochloric
Nitric
Phosphoric
Sulphuric
What is the correct formula for Hydrochloric Acid?
HC
HCl
HCL
CLH
What is the correct formula for Sulphuric Acid?
HSO4
H2SO4
HSOS
H4SO2
Which of the following would not be part of the method to make crystals of Copper Sulphate?
Dissolve Copper Oxide in Sulphuric Acid and heat gently in a water bath to produce copper sulphate solution.
Heat Copper Sulphate solution gently to remove water from solution of Copper Sulphate.
Heat at high temperatures until all of your Copper sulphate solution has evaporated.
Allow crystals to form slowly over a number of days to produce a larger crystal size.
Filter your Copper Oxide from the Copper sulphate solution to collect the filtrate in a beaker.
During the electrolysis of Molten Aluminium Oxide (Al2O3(L)) what is added to the electrolyte to lower its melting point?
Salt
Cryolite
Water
Sulphuric Acid
What is produced when an acid reacts with a metal carbonate e.g. MgCO3?
Salt + Water + Carbon Dioxide
Salt + Carbon Dioxide
Water + Carbon Dioxide
Salt + Water
During electrolysis the substance being separated is called
Compound
Mixture
Electrolyte
Cryolite
Hydrochloric Acid + Calcium Hydroxide >
Calcium Chloride + Water + Carbon-Dioxide
Calcium Nitrate + Water + Carbon-Dioxide
Calcium Phosphate + Water + Carbon-Dioxide
Calcium Chloride + Carbon-Dioxide
