Question

write chemical reaction in which colour changed​

Answer 1

Explanation:

$potassium \: dichromate \: solution \: and \: sulphur \: dioxide \: are \: charaterised \: by \: change \: in \: colour \: from \: orange \: to \: green$

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Answer 2

Answer:

some chemical reaction change into citric acid react with potassium permanganate then purple colour disappeared