Question

What happens when 1)dilute sulphuric acid is poured over copper plate 2)iron nail are placed in copper sulphate solution

Answer 1

(a) When dilute sulphuric acid is poured on a copper plate, copper does not react with dilute sulphuric acid. Copper + dilute sulphuric acid →  No reaction (b) When iron nails are placed in copper sulphate, displacement reaction takes place in which iron converts into copper. The blue colour copper sulphate has turned greenish.   Iron + Copper sulphate →   Iron sulphate + copper                 (blue)                 (light green)

Answer 2

Displacement Reaction occurs in both the cases.