(i) Explain the following in terms of gain or loss of oxygen:

(a) Oxidation
(b) Reduction

(ii) In the reaction:

$3Mn{O}_2+4Al\to 3Mn+2A{l}_2{O}_3$
(a) Name the substance oxidised
(b) Name the substance reduced
(c) Name the oxidizing agent
(d) Name the reducing agent

In the raction represented by the following equation :

$CuO\left(s\right)+H_2$ $⟶$ $Cu\left(s\right)+H_{2}O\left(l\right)$

(a) name the substance oxidised (b) name the substance reduced

(c) name the oxidising agent (d) name the reducing agent

Name the oxidizing agent and reducing agent in the following equation.
$3Mn{O}_2\left(s\right)$ + $4Al\left(s\right)$ $\to$ $3Mn\left(s\right)$ + $2{Al}_2{O}_3\left(s\right)$

(a) Explain the following in terms of gain or loss of oxygen with one example each :

(i) oxidation (ii) reduction

(b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.