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What happens when a gas obtained by the action of dilute H2SO4 on ferrous sulphide is passed through acidified solution of potassium dichromate? ​

Answer»

Answer: SULFUR dioxide react with POTASSIUM dichromate and sulfuric acid

SO2 + K2Cr2O7  + 3H2SO4  → K2SO4  + Cr2(SO4)3  + 3H2O

Sulfur dioxide react with potassium dichromate and sulfuric acid to produce potassium sulfate, chromium(III) sulfate and WATER and  the SOLUTION TURNS from orange to green.

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