5. The reddish-brown colouration on iron surfaces is due to the formation of__________
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rusting is the right answer
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- When a nail made up of iron is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of the iron nail. The color of copper sulphate solution changes from blue color to light green color. ... copper is going to form a reddish brown color deposit on iron nails.
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