Why only HCl and not sulphuric acid is used to remove the copper rusting?

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Solution

Sulphuric acid is a very strong acid and can react with copper to cause a reaction. Even dilute sulphuric acid is highly reactive.

Hydrochloric acid pickles much faster while minimizing base metal loss.

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Why is dilute sulphuric acid used in place of concentrated sulphuric acid to prepare copper sulphate?

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