Which of the following metals can displace copper from copper sulphate solution ? A. Platinum B. Mercury C. Iron D. Gold

The correct answer is: C. Iron

Platinum, mercury, and gold are all more reactive than copper and will not displace copper from copper sulfate solution. Iron is less reactive than copper and will displace copper from copper sulfate solution.

Here is a more detailed explanation

• Platinum is a very unreactive metal. It is so unreactive that it is used in jewelry and
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  other applications where it needs to resist corrosion. Platinum is not reactive enough to displace copper from copper sulfate solution.
• Mercury is a liquid metal that is also very unreactive. It is used in thermometers and other applications where it needs to resist corrosion. Mercury is not reactive enough to displace copper from copper sulfate solution.
• Gold is a very unreactive metal that is also very valuable. It is used in jewelry and other applications where it needs to resist corrosion. Gold is not reactive enough to displace copper from copper sulfate solution.
• Iron is a metal that is less reactive than copper. It is used in construction and other applications where it needs to be strong and durable. Iron is reactive enough to displace copper from copper sulfate solution.