Chemistry Unclassified 2 Marks Appeared in: 2023 (2 sets) Complete the following equations : (a) $2\text{MnO}_4^- + 5\text{NO}_2^- + 6\text{H}^+ \longrightarrow$ (b) $\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 6\text{e}^- \longrightarrow$