Question

Blue coloured solution is given in the figure. Which solution is it? What causes the
colour change in this solution. Explain.​

Answer 1

Answer: It can be solution of copper sulphate solution because its colour is blue  

Answer 2

Answer:

it is copper sulphate solution

Explanation:

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.