Which among the following is the least reactive metal?

Iron

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Potassium

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Zinc

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Gold

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Solution

The correct option is D Gold
Metals are arranged in a series of its reactivity is called metal reactivity series.
Metals like potassium, sodium are placed at the top of the reactivity series and it is highly reactive.
Metals like copper, silver and gold are at the bottom of the reactivity series and it is least reactive.

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