Starch-iodide paper is used for the test of:

Identify the weakest oxidizing agent among the following.

What is an oxidising agent and a reducing agent? Explain with examples.

Which substance is serving as a reducing agent in the following reaction: $14H^{+} + Cr_2O_7^{2-} + 3Ni \to 2Cr^{3+} + 7H_2O + 3Ni^{2+}$?

Which of the following anions would decolourise acidified $KMnO_4$ solution?

Identify the change in the oxidation state of the oxidising agent in the following redox reaction: $3H_3AsO_3(aq) + BrO_3^-(aq) \rightarrow Br^-(aq) + 3H_3AsO_4(aq)$