Chemistry
(a) Select the correct answer from A, B, C and D.
A. Nitroso iron (II) sulphate
B. Iron (III) chloride
C. Chromium sulphate
D. Lead (II) chloride.
(i) The compound which is responsible for the green colour formed when SO2 is bubbled through acidified potassium dichromate solution.
(ii) Compound responsible for brown ring.
Practical Chemistry
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Answer
(i) Chromium sulphate
K2Cr2O7 + H2SO4 + 3SO2 ⟶ K2SO4 + Cr2(SO4)3 + H2O
(ii) Nitroso iron (II) sulphate
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