Chemistry
Which metal gives hydrogen upon reaction with all of the following - Acid, alkali, water?
- Iron
- Zinc
- Magnesium
- Lead
Hydrogen
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Answer
Zinc
Reason — Zn has a unique nature.
Zinc is considered to have a unique nature because it can react with acids and can even react with hot conc. alkalis to form hydrogen and a soluble salt.
Zn + 2HCl ⟶ ZnCl2 + H2
Zn + 2NaOH ⟶ Na2ZnO2 + H2 ↑
Zn with water also gives hydrogen
Zn + H2O ⟶ ZnO + H2
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