MediumChemistryHigh School (9–10)GeneralChemical Reactions › Types of Chemical ReactionsConceptualBoard Exam
Which of these are redox reactions? Give the reason for each…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Which of these are redox reactions? Give the reason for each.
Need a reminder? The key ideaShow
Oxidation is a gain of oxygen or a loss of hydrogen; reduction is a loss of oxygen or a gain of hydrogen. They happen together. The oxidising agent gives oxygen (or takes hydrogen) and is itself reduced; the reducing agent takes oxygen (or gives hydrogen) and is itself oxidised.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Carbon gains oxygen: redox.
Step 2. (b) Nothing gains or loses oxygen or hydrogen: not redox.
Step 3. (c) Zinc oxide loses oxygen and carbon gains it: redox.
Answer: (a) and (c).
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