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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

When is passed through acidified solution of potassium dichromate, chromium sulphate is formed. The change in oxidation number of chromium is:

Answer: (C)

Solution

3SO_2+K_2Cr_2O_7+H_2SO_4 \to K_2SO_4+Cr_2(SO_4)_3+H_2O: chromium is reduced from +6 to +3. The correct answer is option (C).

Question ID VK-136864