Consider the reaction:

This is an example of:

54 The process of respiration is: 55 Which of the following can be decomposed by the action of light? 57 You are given the following chemical equation:

Mg (s) + CuO (s) → MgO (s)+ Cu(s)

This equation represents:

58 When a green iron salt is heated strongly, its colour finally changes to brown and odor of burning sulphur is given out.

(a) Name the iron salt.

(b) Name the type of reaction that takes place during the heating of iron salt.

(c) Write a chemical equation for reaction involved.