Title REDOX REACTIONS Q-5.pdf ✅

CLASS : XIIth SUBJECT : CHEMISTRY DATE : DPP NO. : 5 1. Co(s) + Cu2+(aq) ⟶Co2+(aq) +Cu(s). This reaction is : a) Oxidation reaction b)Reduction reaction c) Redox reaction d)None of these 2. The oxidation state of I in H4IO ― 6 is : a) +7 b)−1 c) +5 d)+1 3. The oxidation number of N in NH3 is : a) −3 b)+3 c) Zero d)5 4. Mn2+ can be converted into Mn7+ by reacting with a) SO2 b)Cl2 c) PbO2 d)SnCl2 5. The oxidation number of Ni in K4[Ni(CN)4] is : a) +1 b)+2 c) −1 d)0 6. Which change occur when lead monoxide is converted into lead nitrate? a) Oxidation b)Reduction c) Neither oxidation nor reduction d)Both oxidation and reduction 7. How many mole of electron are involved in the reduction of one mole of MnO ― 4 ion in alkaline medium to MnO ― 3 ? a) 2 b)1 c) 3 d)4 8. The oxidation number of Fe in K4Fe(CN)6 is : a) +2 b)+3 c) +4 d)+6 9. For the reaction,NH3 + OCl― ⟶N2H4 + Cl― occurring in basic medium, the coefficient of N2H4 in the balanced equation will be a) 1 b)2 c) 3 d)4 10. In the reaction H2O + H2O2⟶S + 2H2O a)H2S is an acid and H2O2 is a base b)H2S is a base and H2O2 is an acid Topic :-REDOX REACTIONS