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MHT CET202020 Oct 2020Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

When SO ₂ is passed through acidified K ₂ Cr ₂ O ₇ solution

Options

  1. Areduction of SO ₂ takes place
  2. Bthe solution turns orange
  3. Cthe solution turns blue
  4. Dthe solution turns green

Correct answer

D. the solution turns green

Step-by-step solution

Action of acidified potassium dichromate on SO ₂ : Sulphur dioxide gas is oxidized to sulphuric acid when passed through acidified potassium dichromate solution. The colour of the solution changes from orange to green because potassium dichromate is reduced to chromic sulphate.

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