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This quiz contains 11 questions from a mix of 1 subtopics.
Select the correct redox equation formed from the combination of the following half equations:
Cu ➔ Cu2+ + 2e-
NO3- + 2H+ + e- ➔ H2O + NO2
Cu + 2NO3- + 4H+ ➔ Cu2+ + H2O + 2NO2
Cu + 2NO3- + 4H+ ➔ Cu2+ + 2H2O + 2NO2
Cu + NO3- + 2H+ ➔ Cu2+ + H2O + NO2
Cu + 2NO3- + 2H+ ➔ Cu2+ + H2O + 2NO2
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In the redox reaction MnO4- + 5Fe2+ + 8H+ ➔ Mn2+ + 5Fe3+ + 4H2O, how many electrons are gained by MnO4-?
5
3
1
2
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In the redox reaction Sn + 4HNO3 ➔ SnO2 + 4NO2 + 2H2O, how many electrons are lost by Sn?
3
4
1
2
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Select the correct oxidation half-equation in the reaction 2H2O2 ➔ 2H2O + O2.
H2O2 + 2H+ + 2e- ➔ 2H2O
H2O2 + 2H+ ➔ 2H2O + 2e-
H2O2 ➔ O2 + 2H+ + 2e-
H2O2 + 2e- ➔ O2 + 2H+
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Select the correct reduction half-equation in the reaction 2H2O2 ➔ 2H2O + O2.
H2O2 + 2H+ ➔ 2H2O + 2e-
H2O2 ➔ O2 + 2H+ + 2e-
H2O2 + 2e- ➔ O2 + 2H+
H2O2 + 2H+ + 2e- ➔ 2H2O
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What is the term for a chemical reaction where atoms of the same element can be both oxidised and reduced?
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Identify which equation is not a redox process.
Cu + 2HCl ➔ CuCl2 + H2
2Cu2O + Cu2S ➔ 6Cu + SO2
Cu2O + 2HCl ➔ 2CuCl + H2O
Cu2O ➔ Cu + CuO
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Identify which equation represents disproportionation.
Cu2O ➔ Cu + CuO
2Cu2O + Cu2S ➔ 6Cu + SO2
Cu2O + 2HCl ➔ 2CuCl + H2O
Cu + 2HCl ➔ CuCl2 + H2
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Write the balanced half equations for the reaction Cu + 2HNO3 ➔ Cu(NO3)2 + H2
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What is the half equation for the reduction of copper in the reaction: CuO(s) + H2(g) ➔ Cu(s) + H2O(l)?
Cu2+ + 2e- ➔ Cu
Cu ➔ Cu2+ + 2e-
CuO + 2e- ➔ Cu + O2-
CuO ➔ Cu + O2-
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Select the correct half-equation which describes the reduction of bromine.
Br2 + 2e- ➔ 2Br-
Br2 ➔ 2Br- + 2e-
Br2 ➔ Br- + e-
Br2 + e- ➔ Br-
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