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ICSE Class 9 Chemistry Question 4 of 24

Model Question Paper — 1 — Question 12

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12
Question

Question 1(xii)

Which metal gives hydrogen upon reaction with all of the following - Acid, alkali, water?

  1. Iron
  2. Zinc
  3. Magnesium
  4. Lead
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