What chemical process is used for obtaining a metal from its oxide?

(a) Name two metals which are found in free state in nature. (b) What chemical process is used for extracting a metal from its oxide ore? Name one metal which is extracted by this method. (c) Describe the extraction of zinc metal from its sulphide ore as well as its carbonate ore. Write equations of all the reactions involved.

(a) What is reactivity series ? How does the reactivity series of metals help in predicting the relative activities of various metals ? (b) Suggest different chemical processes used for obtaining a metal from its oxides for metals in the middle of the reactivity series and metals towards the top of the reactivity series. Support you answer with one example each.

(a) What is reactivity series of metals ? What can you say about the reactivity of metals which are placed: (i) in the middle of reactivity series? (ii) towards the bottom of reactivity series? (iii) towards the top of reactivity series? (b) A metal is placed in the middle of reactivity series. Suggest a chemical process to obtain this metal from its oxide. Support you answer with one example. (c) A metal is placed towards the top of the reactivity series. Suggest a chemical process to obtain this metal from oxide. Support your answer with one example.