Question

Change in colour is an indication of a chemical reaction. Justify

Answer 1

Answer:

Let's take an example to justify the above statement

Example

Take an iron sulphate solution. Iron sulphate solution is green in colour.

Now add a copper substance in the solution.

Observation: We observe that the solution turns blue in colour when a copper substance is added to the iron solution and some iron deposits on the bottom of the solution is also observed. Thus colour change is an indication of a chemical reaction. The chemical reaction that takes place is -

FeSo4 + Cu --------------> CuSo4 + Fe

(green) (Blue) (Iron Deposits)

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