Class 9 Chemistry
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Questions and Answers

What product is formed when red hot iron reacts with steam?

  • Magnesium oxide
  • Zinc oxide
  • Aluminium hydroxide
  • Triferric tetra-oxide (correct)

    • Which metal reacts with steam to liberate hydrogen gas and white ash?

  • Magnesium (correct)
  • Calcium
  • Aluminium
  • Zinc

    • Which metal sinks in water and reacts vigorously with the evolution of hydrogen?

  • Iron
  • Aluminium
  • Calcium (correct)
  • Zinc

    • What are the oxides and hydroxides of zinc and aluminium?

    <p>Amphoteric</p> Signup and view all the answers

    What kind of reaction do zinc and aluminium undergo with hot concentrated alkalis?

    <p>Form hydrogen and a soluble salt</p> Signup and view all the answers

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