The colour changes observed when testing for reducing agents using acidified potassium heptaoxodichromate (VI) solution is?

  • A yellow to purple
  • B orange to green
  • C green to orange
  • D purple to yellow
jamb 2009chemistry

The correct answer is B. orange to green

Reducing agent like SO\(_2\).

Sulphur dioxide gas (SO\(_2\)) is bubbled through acidified potassium dichromate. The orange solution turns green.

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