Chemistry
Grade-8
Easy

Question

When a few nails of iron are dropped in the blue coloured copper sulphate solution, blue colour of copper sulphate solution fade in the below chemical change. Why does it happen?

  1. Due to formation of green FeSO4
  2. Due to formation of ferrous oxide
  3. Due to the formation of brown colour (FeSO)4
  4. The copper deposits in the reaction

hintHint:

More reactive metal can displace the less reactive metal in its solution. 

The correct answer is: Due to formation of green FeSO4


    When a few nails of iron are dropped in the blue-colored copper sulfate solution, the blue color of the copper sulfate solution fade in the below chemical change due to the formation of green (FeSO)4.
    • Iron nails are made up of iron metal only.
    • As copper sulfate is blue colored salt, its aqueous solution is blue in color. 
    • As we know, more reactive metal can displace the less reactive metal in its solution.

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