General Science question from Panchayat Secretary (VLW) exam, 2025 by JKSSB
Which is the most reactive metal among the following?
Last updated Jun 5, 2026
Correct Answer:
Option B —
Potassium (K)
Understanding Metal Reactivity
The reactivity of a metal is determined by how easily it can lose its valence electrons to form positive ions (cations).
To find the most reactive metal, we refer to the Reactivity Series (or Activity Series), which ranks metals from most reactive to least reactive based on their reactions with water, acids, and oxygen.
Based on this series, we can rank the given options from most reactive to least reactive:
Potassium (K) – Highly reactive (Group 1 alkali metal). It reacts violently with cold water and catches fire instantly.
Zinc (Zn) – Moderately reactive. It does not react with cold water but reacts steadily with acids.
Copper (Cu) – Low reactivity. It does not react with water or dilute acids.
Silver (Ag) – Highly unreactive noble metal. It is found at the very bottom of the reactivity series, which is why it doesn't easily tarnish or corrode.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
