When an iron nail is dipped into an aqueous copper sulphate solution, the nail turns brownish. What is the correct chemical explanation for this observation?

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Chemistry · Chemical Reactions and Equations

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

Copper is displaced by iron due to higher reactivity and gets deposited on the nail.

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Answer 1

Iron reacts directly with water to form a brown hydroxide coating.

Answer 2

Iron displaces hydrogen from water, forming a layer of brown iron oxide.

Answer 3

The brown colour is due to immediate rust formation on the iron nail.

Answer 4

Copper is displaced by iron due to higher reactivity and gets deposited on the nail.

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