(i) K,Cr20, + SO2 + H2SO4
→ K2SO4 + Cr2(SO4)3 + H2O balance the given equation :-)
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Answer: K2Cr2O7 + H2SO4======> CuSO4 + 2H2O + SO2
Explanation:
This is a test for sulphuric acid
Orange potassium dichromate turns to green chromium sulphate
U can also say that sulphur dioxide turns acidified potassium dichromate solution green i.e. reducing property of SO2
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