Why copper does not react with hydrochloric acid but reacts with sulphuric acid why what's the reason?

Answer 1

For HCl and Copper, Copper is below Hydrogen on a reactivity series, which is a diagram about the reactivity of metals and allows you to predict if two metals will react. Because Copper is below Hydrogen, the Cl will stay with the Hydrogen. However, Copper Oxide will react with HCl.

For Copper and Sulfuric Acid, only at a high Sulfuric Acid concentration and in the presence of heat will this oxidation take place. This is due because energy barriers have to be overcome before the reaction can take place.