AQA A-level Chemistry Oxidation and
Reduction Questions and Answers
Oxidation – answer increase in charge, loss of electrons
Oxidising agent – answer electron acceptor is reduced, oxidises another chemical
Reduction – answer reduction of charge, gain of electrons
Reducing agent – answer electron donor is oxidised, reduces another chemical
Oxidation states – answer number describing how many electrons an atom in a
chemical bond has lost or gained compared to its elements
Oxidation state of uncombined elements - answer0
Oxidation state of Group 1 metals - answer+1
Oxidation state of Group 2 - answer+2
Oxidation state of hydrogen - answer+1
-1 in metal hydrides
Oxidation state of oxygen - answer-2
-1 in peroxides
Oxidation state of fluorine - answer-1
Oxidation state of chlorine - answer-1
+1 in with (F) or (O)
Half equations - answerequations describing either the oxidation or reduction processes
of a redox reaction
Reduction Questions and Answers
Oxidation – answer increase in charge, loss of electrons
Oxidising agent – answer electron acceptor is reduced, oxidises another chemical
Reduction – answer reduction of charge, gain of electrons
Reducing agent – answer electron donor is oxidised, reduces another chemical
Oxidation states – answer number describing how many electrons an atom in a
chemical bond has lost or gained compared to its elements
Oxidation state of uncombined elements - answer0
Oxidation state of Group 1 metals - answer+1
Oxidation state of Group 2 - answer+2
Oxidation state of hydrogen - answer+1
-1 in metal hydrides
Oxidation state of oxygen - answer-2
-1 in peroxides
Oxidation state of fluorine - answer-1
Oxidation state of chlorine - answer-1
+1 in with (F) or (O)
Half equations - answerequations describing either the oxidation or reduction processes
of a redox reaction
