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

Chemistry
JAMB 2009

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
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Correct Answer: Option B
Explanation

Reducing agent like SO\(_2\).

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

There is an explanation video available below.

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Explanation Video

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