Class IX Metals and Non-metals Properties
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Questions and Answers

Which of the following is a physical property used to classify metals?

  • Metallic lustre (correct)
  • Transparency
  • Odor
  • Brittleness
  • What happens to the surface of metals in their pure state?

  • They become brittle
  • They have a shining surface (metallic lustre) (correct)
  • They become dull
  • They become transparent
  • Which of the following metals is most likely to have a shiny appearance even after cleaning?

  • Lead
  • Iron
  • Copper (correct)
  • Sodium
  • What term is used to describe the ability of metals to be hammered into thin sheets?

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

    Which of the following metals is most likely to exhibit malleability?

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

    Why should sodium metal be handled with care?

    <p>Because it reacts violently with water</p> Signup and view all the answers

    Which property of metals is demonstrated by beating them into thin sheets?

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

    What property of metals allows them to be drawn into thin wires?

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

    Which metal is mentioned as the most ductile in the given text?

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

    What is the best conductor of heat according to the given text?

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

    What property of metals causes them to produce a sound when struck on a hard surface?

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

    Which metal mentioned in the text is used for making cooking vessels?

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

    What does the ability of metals to conduct electricity indicate?

    <p>Good conductor of electricity</p> Signup and view all the answers

    Study Notes

    Physical Properties of Metals

    • Luster is a physical property used to classify metals.
    • In their pure state, the surface of metals tends to be shiny.

    Malleability and Ductility

    • Malleability is the ability of metals to be hammered into thin sheets.
    • Copper is most likely to exhibit malleability.
    • Ductility is the ability of metals to be drawn into thin wires.
    • Copper is mentioned as the most ductile metal.

    Special Properties of Metals

    • Sodium metal should be handled with care due to its high reactivity.
    • The ability of metals to conduct electricity indicates their electrical conductivity.

    Other Properties

    • The property of metals that allows them to produce a sound when struck on a hard surface is sonorousness.
    • Copper is often used for making cooking vessels.

    Conductivity

    • Copper is the best conductor of heat.

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    Description

    This quiz covers the physical properties of metals and non-metals, their classification, and their uses in daily life. It explores the relationship between the properties of these elements and their practical applications.

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