Metal at the top of the reactivity series and metal at the bottom of the reactivity series are _____.

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Potassium and platinum respectively

Gold and potassium respectively

Sodium and silver respectively

Silver and sodium respectively

answer is A.

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Detailed Solution

The reactivity series follows the order:

K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au>Pt

Thus, potassium is the most reactive metal placed at the top of the reactivity series. Platinum is the least reactive, placed at the bottom of the reactivity series.

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