Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first: Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.

44 What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place. 44 What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved. 45 What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved. 46 A copper plate was dipped in AgN03 Solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.