Which of these metals does NOT react with dilute HCl to release hydrogen gas?
A{'text': 'Magnesium', 'label': 'A'}
B{'text': 'Zinc', 'label': 'B'}
C{'text': 'Copper', 'label': 'C'}
D{'text': 'Iron', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'Copper', 'label': 'C'}
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. NCERT explicitly states: "In the case of copper, no bubbles were seen … Cu does not react with dilute HCl."
_Source: NCERT Class 10 Science, Ch 3 "Metals and Non-metals", §3.2.3_
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