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According to the notes, what happens when a Zn rod is placed in $ZnSO_4$ solution?
A$Zn^{2+}$ ions from solution deposit on the rod, making the rod positively charged
BZn atoms of the rod go into solution as $Zn^{2+}$, leaving electrons on the rod
CSulfate ions oxidize zinc and remove electrons from the rod completely
DThe rod remains electrically neutral because no charge separation occurs
Answer & Solution
Correct answer: B. Zn atoms of the rod go into solution as $Zn^{2+}$, leaving electrons on the rod
The notes state that Zn atoms of the rod convert into $Zn^{2+}$ ions and enter the solution, leaving electrons behind on the rod. Hence the rod becomes negatively charged and the nearby solution becomes positively charged.
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