alleryWhich of these metals does NOT react with dilute HCl to release hydrogen gas?
AMagnesium
BZinc
CCopper
DIron
Answer & Solution
Correct answer: C. Copper
1. Metals above hydrogen in the reactivity series displace H⁺ from dilute acids.
2. Mg, Al, Zn and Fe all react with dilute HCl to release H₂ gas.
3. Copper sits BELOW hydrogen in the reactivity series.
4. Your syllabus explicitly states: "In the case of copper, no bubbles were seen … Cu does not react with dilute HCl."
_Source: syllabus Science, Ch 3 "Metals and Non-metals", §3.2.3_
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