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ICSE Class 10 Chemistry Question 14 of 42

Practical Chemistry — Question 15

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15
Question

Question 1(2012)

Name the gas which turns acidified potassium dichromate clear green.

Answer

Sulphur dioxide gas (SO2)

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