Question

Balance the following redox reactions by ion – electron method : MnO₄⁻(aq) + I⁻(aq) → MnO₂(s) + I₂(s)

Balance the following equations in basic medium by ion-electron method and oxidation number method and identify the oxidising agent and the reducing agent. P₄(s) + OH⁻(aq) → PH₃(g) + HPO₂⁻(aq)

Chlorine is used to purify drinking water. Excess of chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water.

Consider the following reaction: Zn + Cu²⁺ → Zn²⁺ + Cu With reference to the above, which one of the following is the correct statement?