The metal that gives hydrogen gas upon treatment with both the acid as well as the base is:
d & f-Block Elements · Class 12 · JEE Main Previous Year Question
The metal that gives hydrogen gas upon treatment with both the acid as well as the base is:
- a✓
Zinc
- b
Magnesium
- c
Iron
- d
Mercury
Zinc
Amphoteric metals react with both acids and bases to liberate .
Zinc with acid:
Zinc with base:
Why others fail:
- Mg: reacts with acid but not with NaOH (not amphoteric)
- Fe: reacts with dilute acid but not with NaOH
- Hg: does not react with dilute acids or bases
Zn is amphoteric — its oxide (ZnO) and hydroxide are also amphoteric.
Answer: Option (1) — Zinc
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