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Which of the following metals would not release hydrogen when reacted with dilute HCl?

Chemistry
WAEC 2025

Which of the following metals would not release hydrogen when reacted with dilute HCl?

  • A. Calcium
  • B. Silver
  • C. Iron
  • D. Zinc
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Correct Answer: Option B
Explanation

Silver (Ag) is located below hydrogen in the reactivity series. For a metal to release hydrogen gas when reacted with a dilute acid like HCl, it must be more reactive than hydrogen to displace it from the acid. Because silver is less reactive, it cannot displace hydrogen ions (H\(^+\)) to form hydrogen gas (H\(_2\)), and thus no reaction occurs. 


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