The metal which does not react with water or dilute sulphuric acid but reacts with concentrated sulphuric acid

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Solution

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Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen. But, concentrated sulphuric acid is an oxidising agent. So, when copper is heated with conc.H₂SO₄, a redox reaction occurs and the acid gets reduced to sulphur dioxide.

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Copper does not react with conc. sulphuric acid but reacts with the dilute acid

Which of the following does not react with dilute sulphuric acid?

All metals reacts with acid. Why copper reacts with sulphuric acid but not hydrochloric acid?

Statement 1: Concentrated sulphuric acid reacts with metals and oxidises them.

Statement 2: Concentrated sulphuric acid reacts with non-metals and reduces them.

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