please answer all of them correctly

b. CHA(g) +20218) 7. Which of the following equations does not represent an oxidation-reduction reaction? a. Mg(s) + 2HCl(aq) MgCl2(aq) + H2(e) CO2(g) + 2H2O(B) C. SO3(8) + Caois) CaSO4(s) d. 2Nag) + 2H200 + 2NaOH(aq) + H2(g) e. PC13(e) + Cl268) PC15(e) + - 2. Using the following reaction, identify the oxidizing agent: 5VO2+ + Mno, +H2O 5 Vo,*+ Mn2+ + 2H* a. Mn b. o c. V d. H e. Not a redox reaction 3. What substance is the strongest oxidizing agent? a. Fe b. Brz c. H2 d. Cu2+ e. Zn2+ 5. An electrochemical cell is constructed with a nickel electrode immersed in a 1.0M SnCl2 solution and a silver electrode immersed in a 1.0M AgNO, solution. At 25C, the standard potential for this galvanic cell is? a. 0.94 V b. 0.66 V c. 2.13 V d. 0.57 V