Chemistrymedium · Past Paper
What happens when an iron nail is dipped in a blue copper sulfate solution?
AThe solution remains blue
BA reddish-brown deposit is formed on the nail
CNo change occurs
DThe nail dissolves completely
✓ Correct Answer: B — A reddish-brown deposit is formed on the nail
Iron displaces copper, and the displaced copper metal deposits on the iron nail as a reddish-brown layer.
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