Question

11. Nisha placed iron nail in the copper sulphate
solution. What changes will occur in the blue
colour of copper sulphate solution?
(a) Blue colour will change to pink
(b) Blue colour will change to green
(c) Blue colour will change to black
(d) No change will occur​

Answer 1

Answer:

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Explanation:

Answer 2

Answer:

the answer is (b)blue colour will change to green

Explanation:

the change happened due to a reaction between copper sulphate and iron. the change of colour of the solution from Blue to green is due to the formation of iron sulphate, a new substance.this is a chemical change