- Question Answer
- Explain the following in terms of gain or loss of oxygen with two examples each
. Explain the following in terms of gain or loss of oxygen with two examples each
(a) Oxidation (b) Reduction
Answer: (a) Oxidation: A chemical reaction in which gain of oxygen or loss of hydrogen takes place.
Here, magnesium is oxidised to form magnesium oxide
Here, copper is oxidised to form copper oxide.
(b) Reduction: A chemical reaction in which loss of oxygen or gain of hydrogen takes place.
Example: (i) When zinc oxide is heated with carbon, then zinc metal and carbon monoxide are formed:
In this reaction, Zinc oxide (ZnO) is reduced to zinc by the loss of oxygen.
(ii) When copper oxide is heated with hydrogen, then copper metal and water are formed:
In this reaction, copper oxide is losing oxygen to form copper metal. Therefore, copper oxide is reduced to copper.