Oxidation and reduction
3 marks · EasyThe table shows whether substances gain or lose oxygen in a reaction.
| Substance | Oxygen gained/lost |
|---|---|
| A | gains oxygen |
| B | loses oxygen |
| C | no change |
(a)[1 mark]
Which substance is being oxidised?
(b)[1 mark]
Which substance is being reduced?
(c)[1 mark]
State the meaning of oxidation in terms of oxygen transfer.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) A
(b) B
(c) Gain of oxygen
Show mark scheme and worked solution
Marking points
A1 (a) · 1 mark · Identifies A as the oxidised substance.
A2 (b) · 1 mark · Identifies B as the reduced substance.
A3 (c) · 1 mark · States that oxidation is gain of oxygen.
Worked solution
a) Substance A b) Substance B c) Oxidation means gain of oxygen.