The colour changes observed when testing for reducing agents using acidified potassium heptaoxodichromate (VI) solution is?
- yellow to purple
-
orange to green
- green to orange
- purple to yellow
The correct answer is: 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 .