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Question
Which of the following can undergo a chemical reaction?
Options
MgSO4 + Fe
ZnSO4 + Fe
MgSO4 + Pb
CuSO4 + Fe
Solution
CuSO4 + Fe
Explanation -
Iron is more reactive than copper and thus, can replace copper from its salt.
`"CuSO"_4("aq") + "Fe"("s") -> "FeSO"_4("aq") + "Cu"("s")`
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