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<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Explain the reactivity series of metals and arrange the given metals in the descending order of their reactivity.
Aluminium, Copper, Potassium

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Solution

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> The arrangement of metals in decreasing order of their reactivity is called reactivity series of metals.

The order of reactivity of metals is as follows,
Potassium > Sodium > Magnesium > Aluminium > Zinc > Iron > Copper > Silver > Gold.

Therefore, according to this order, we can arrange the order of reactivity of metals given in the question as:
Potassium> Aluminium> Copper

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