Question

Define a decomposition reaction. How can we say that (I) electrolysis of water, and (II) blackening of silver bromide when exposed to sunlight, are decomposition reactions ? Mention the type of energy involved in each case.

The type of reactions in which (I) calcium oxide is formed, and (II) calcium hydroxide is formed are opposite reactions to each other. Justify this statement with the help of chemical equations.

Write the essential conditions for following reaction to take place and name its types : 2AgCl → 2Ag + Cl₂

Complete the following chemical reaction in the form of a balanced equation : FeSO₄ —Δ→ Fe₂O₃ + ...... + ......