Question

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Answer 1

Answer:

Hi

Explanation:

Copper does not react with dilute sulphuric acid. So, no reaction will take place when diluting sulphuric acid is poured onto a copper plate. But when concentrated sulphuric acid is poured onto a copper plate, effervescence is observed.

Copper + Conc. → Copper + Hydrogen

               Sulphuric          Sulphate           gas

               Acid