Which is the most reactive metal?(a) iron(b) potassium(c) calcium(d) sodium?
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Potassium then sodium after that
calcium at last iron
calcium at last iron
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Potassium then sodium after that
calcium at last iron
Potassium is placed above all the given metals in the reactivity series. The reactivity series is a list of metals arranged in the order of their decreasing activities.
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