Question

write a report on reactivity on metals how it helps in electroplating and galvanisation process

Answer 1

The reactivity series allow us to predict how metals will react.A more reactive metals will displace a less reactive metal from a compound.Rusting is an oxidation reaction.
MOST REACTIVE
            ↓
 potassium 
            ↓
     sodium
            ↓
      lithium
             ↓
      calcium
             ↓
     magnesium
             ↓
    aluminium
             ↓ 
         zinc
             ↓
         iron
              ↓
        copper
               ↓
         silver
               ↓
              gold
                ↓
  least reactive            
Galvanization is a method of rust prevention.The iron or steel object is coated in a thin layer of zinc.This stops oxygen & water reaching the metal underneath but the zinc also acts as a sacrificial metal.Zinc is more reactive than iron.so it oxidizes in presence of the iron object.
Electroplating is the application of a metal coating to a metallic or other conducting surface by electrochemical methods.
Thus a less reactive metals coats a more reactive metal.