Q

Arrange the following metals in the correct order of reactivity. K, Al, Fe, Au, Pb

RRB Group D, 6-Oct-22 S-1 2022
✓ Answer: B K > Al > Fe > Pb > Au
The reactivity series ranks metals by their tendency to lose electrons. Potassium (K) is the most reactive, followed by aluminum (Al). Iron (Fe) is next, then lead (Pb), and gold (Au) is the least reactive. Hence, the order is: K > Al > Fe > Pb > Au.
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