Copper sulphate solution reacts with iron metal to form copper metal. This is a ______________.
combination reaction
decomposition reaction
double displacement reaction
single displacement reaction
An iron nail is immersed in a solution of copper sulphate of copper sulphate and when it is removed from the solution, it is coated with a layer of copper metal. After that a different iron nail is immersed in a solution of zinc nitrate and removed, this nail rusted just as rapidly as a new iron nail. Rank these three metals in order of activity from most active to least active.
What happens when a piece of copper metal is placed in iron sulphate solution?