Name the most reactive and the least reactive metal.

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Solution

Reactivity - The ability of an element to displace another element is known as its relation position in the activity series.
Potassium (K) is the most reactive and platinum (Pt) is the least reactive metal.
According to the activity series the active element displaces the less active element from its compound in its aqueous solution.
Activity series of metal in increasing order K > Na > Cl > Mg >Al> Zn > Fe >Ni >Sn > Pb > H > Cu >Hg > Ag > Au > Pt
(most active metal ) ------------------------------------------------------------------------→> ( least active metal)

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