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  9. Q202

RRB Group D (Level-1 posts) 2022 · Question 202 of 598

Arrange the following metals in the decreasing order of reactivity: K, Na, Zn, Cu, Hg, Ag

  1. AK > Na > Zn > Cu > Hg > AgCorrect
  2. BK > Na > Zn > Ag > Hg > Cu
  3. CK > Na > Zn > Cu > Ag > Hg
  4. DK > Na > Zn > Hg > Cu > Ag

Answer: A. K > Na > Zn > Cu > Hg > Ag

Explanation

The reactivity series lists metals from most to least reactive. Potassium (K) is the most reactive, followed by sodium (Na), zinc (Zn), copper (Cu), mercury (Hg), and finally silver (Ag), based on their tendency to lose electrons and react with substances like water or acids.

Source: RRB Group D 2022 Prev. Yr. Paper (17 Aug 2022) (Shift 3) - Prepp · reliable-secondary

← Q201View full paper (598 questions)Q203 →

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