Question

What is the colour of ferrous sulphate and copper

Answer 1

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When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO4) there takes reaction between them and coppersulphate change its color fromblue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO4. CuSO4 is in blue Color and FeSO4 is in light green color.
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Answer 2

-ferrous sulphate>>light green
-copper sulphate>>blue
I hope it helps....