Question

TUCKED y opin, Munuay 25 November. (2 1. The reaction that takes place in (most) alkaline batteries is as follows: 2 MnO2 + Zn → Mn2O3 + Zno Write the electronic configuration of o, and of O2, the oxide ion, which is present in the three compounds shown above. Deduce the charge, and the oxidation state, for the Mn and the Zn in each of the four substances in the equation. (ii) Specify which species is reduced and which is oxidised in this reaction. (2 Specify which species is the reducing agent and which is the oxidising agent in this reaction. (iv) (2 2. Reaction of H, with ethylene, in the presence of a small amount of palladium catalyst, gives ethane: HH Pd(cat) H-0. HH

Answer 1

10 is mp4 (4,4), moltano magt en +4 0 ta te o vidalu state n) mag gets reduced en get onidized ng is oxidizing agent an is reducing agent Cac & Ph(cat) hc-con H 0.5) 10 H= 1 H= + (= -2 C=-3 " – 4 gets oxidized and cn = ar get reduced - Addition of thy drogen is also reduction thats why it is a redox reaction