Question

14. When iron nail js kept in blue coloured copper sulphate solution, after a while the colour ol in the test tube for the solution is (a) Blue (b) Brown (c) Green (d) Red ​

Answer 1

Answer:

B)Brown

Explanation:

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Answer 2

Answer:

• green

Explanation:

when an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed in the surface of iron and the colour of copper sulphate solution changes from blue to pale green. The reaction shows that iron is more reactive than copper because it displaces copper from the copper sulphate solution. The iron passes into the solution as Fe (II) forming the ferrous sulphate solution