Consider the following equation representing an oxidation reduction reaction: Zn(s) + CuSO4(aq) →→ ZnSO4(aq) + Cu(s), Which statement is true about this reaction?Question 21Answera.Cu is oxidizedb.Oxygen is reducedc.Zn is oxidizedd.S is reduced

Identify the substances that are oxidised and the substances which are reduced in the following reactions.(i) 4Na(s) + O2(g) → 2Na2O(s)(ii) CuO (s) + H2(g) → Cu (s) + H2O(l)Answer:(i) Substances oxidised is Na as it gains oxygen and oxygen is reduced.(ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.

For the following reaction, which chemical is behaving as an oxidising agent and which chemical is behaving as a reducing agent?                CuO + Mg → MgO + CuOxidising agent Reducing agentA CuO MgB MgO CuC CuO MgOD Mg Cu

Consider the following reaction.→+2Nas  Cu2+aq + 2Na+aq  CusPart 1 of 4Which species is being oxidized? Select the single best answer.Na+Cu2+NaCuPart 2 of 4Which species is being reduced? Select the single best answer.Na+CuCu2+Na

Given the balanced equation representing an oxidation – reduction reaction2Al + 3Cu 2+ →→2Al3+ + 3CuWhich statement is true about this reaction?Question 4Answera.Each Al loses 3e- and each Cu2+ gains 2e-b.Each Al loses 2e- and each Cu2+ gains 3e-c.Each Al3+ gains 2e- and each Cu loses 3e-d.Each Al3+ + gains 3e- and each Cu loses 2e-

For the following question two statements are given – one labelled Assertion (A) and the other labelled Reason (R).Assertion: In a reaction of zinc oxide with carbon, zinc oxide is reduced to zinc.Reason: In a chemical reaction, a substance is reduced when it gains oxygen.Select the correct answer to the question