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⏩Colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it.
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❣️Colourless concentrated sulphuric acid in a test tube changes to blue an adding a small piece of copper to it because copper displaces hydrogen present in sulphuric acid. as copper attributes blue colour the acid turns blue.
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Colourless concentrated sulphuric acid in a test tube changes to blue an adding a small piece of copper to it because copper displaces hydrogen present in sulphuric acid. as copper attributes blue colour the acid turns blue.
Thus occurs a redox reaction leaving CuSo4 and sulphur dioxide and water as end products.2H2SO4 + Cu (s) → CuSo4 + SO2 + 2H2Oconcentrated copper Copper sulphur watersulphuric acid sulphate dioxide
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