Question

Give one example each of a chemical reaction characterised by change in colour​

Answer 1

Change in color--- Reaction between citric acid and purple colored potassium permanganate solution gives colourless solution.

Answer 2

Answer:

Copper sulphate and iron

Explanation:

Copper sulphate reacts with iron forming iron sulphate and copper deposit.

Copper sulphate is blue in colour where as iron sulphate if green.

cuso4 (aqueous)   +     fe         ---------------         feso4 (aqueous)      +        cu

(blue)                                                                   (green)  

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