869587
Questão 1
Questão
Which ion do all acids release in solution?
Responda
-
H+
-
OH-
Questão 2
Questão
Which ion do all alkalis release in solution?
Responda
-
H+
-
OH-
Questão 3
Questão
What does the state symbol (aq) mean?
Responda
-
Chemical is only found in aquaria
-
Found in aqueous solution
-
Chemical is water
Questão 4
Questão
True or false? Reacting a metal in acid produces hydrogen gas.
Responda
- True
- False
Questão 5
Questão
Which salt would be produced with reacting cadmium hydroxide and nitric acid?
Responda
-
Cadmium chloride
-
Cadmium sulphate
-
Cadmium nitrate
Questão 6
Questão
Which of these are neutralisation reactions?
Responda
-
H2SO4 + 2NaOH --> Na2SO4 + 2H2O
-
H2SO4 + 2Na --> Na2SO4 + H2
-
H2SO4 + 2KOH --> K2SO4 + 2H2O
-
H2SO4 + 2K --> K2SO4 + H2
Questão 7
Questão
Which of these is a non-metallic cation?
Responda
-
Fe3+
-
NH4+
-
Mg2+
Questão 8
Questão
True or false? Lead iodide is soluble so it forms a precipitate.
Responda
- True
- False
Questão 9
Questão
True or false? The substance that is broken down by electrolysis is the electrolyte.
Responda
- True
- False
Questão 10
Questão
True or false? Anions are attracted to the negatively charged electrode.
Responda
- True
- False
Questão 11
Questão
Which of these ions is reduced and at which electrode?
Responda
-
Pb2+ at the anode
-
Pb2+ at the cathode
-
Br- at the anode
-
Br- at the cathode
Questão 12
Questão
Which of these ions is oxidised and at which electrode?
Responda
-
Pb2+ at the anode
-
Pb2+ at the cathode
-
Br- at the anode
-
Br- at the cathode
Questão 13
Questão
Which of these is a correct, balanced, set of half-equations?
Responda
-
Pb2+ + 2e- --> Pb, Br- --> Br + e-
-
Pb2+ + e- --> Pb+, Br- --> Br+ + 2e-
-
Pb2+ + 2e- --> Pb, 2Br- --> Br2 + 2e-
Questão 14
Questão
What is the name of the ore of aluminium?
Responda
-
Bauxite
-
Haematite
-
Cryolite
-
Malachite
Questão 15
Questão
What is the name of the chemical that reduces the operating temperature of an aluminium electrolysis cell?
Responda
-
Bauxite
-
Haematite
-
Cryolite
-
Malachite
Questão 16
Questão
Which of these are uses of chlorine from the electrolysis of brine?
Responda
-
Making margarine
-
Making bleach
-
Making paper
-
Disinfecting swimming pools
-
Making soap
-
Making polyvinylchloride
Questão 17
Questão
Which of these are uses of hydrogen from the electrolysis of brine?
Responda
-
Making margarine
-
Making bleach
-
Making paper
-
Disinfecting swimming pools
-
Making soap
-
Making polyvinylchloride
Questão 18
Questão
Which of these are uses of sodium hydroxide from the electrolysis of brine?
Responda
-
Making margarine
-
Making bleach
-
Making paper
-
Disinfecting swimming pools
-
Making soap
-
Making polyvinylchloride
Questão 19
Questão
True or false? Electroplating is often done to make production of goods cheaper.
Responda
- True
- False
Questão 20
Questão
True or false? As the anode is made of the plating metal, the electrolyte is not required to contain ions of that metal.
Responda
- True
- False
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