reactivity series

(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.

(a). What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water: Zinc, Iron, Magnesium, Sodium. (b). Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why? (c). Name one metal more reactive ad another less reactive than hydrogen. (d). Name one metal which displaces copper from copper sulphate solution and one which does not. (e). name one metal which displaces silver from silver nitrate solution and one which does not.