Held aloud 0 Add text IV Du 1 Ellingham Diagram 1. Can carbon be used to reduce zinc oxide to zinc at a) 1000 K and b) 1500 K? The reaction we require is: 2C + 2ZnO2 = 2Zn + 2CO 2. What is the best reducing agent at all temperatures up to 2000C? 3. Write the chemical equations corresponding to the lines ending with Al2O3 and Zno. Show how they can be combined to give a spontaneous reaction between one of these metals and the oxide of the other. 4. Why is gold not found in nature as its oxide? 5. Will Al powder react with Cr,0,? If so at what temperature? Write balance equation