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Question

Arrange the following elements in the decreasing order of reactivity

A
K
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B
Al
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C
Zn
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D
Cu
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E
Au
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Solution

Potassium and Aluminium are highly reactive elememts placed at the top of the reactivity series.
Zinc is a moderately reactive element.
Copper is low a reactive element.
Gold is least reactive and found in native state.

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