Q19. A student took a solution of copper sulphate in a beaker, put a clean iron nail into it
and left it for an hour.
(a) What change do you expect?
(b) Write the chemical equation for this reaction.
(1+2)
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Answer: When iron (Fe) is added is copper sulphate (CuSo4) copper gets displaced and iron sulphate (FeSO4) gets formed. The iron nail gets a deposit of brown colour Copper. These changes are chemical in nature
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