Types of Elements and Their Properties Quiz
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Questions and Answers

What are the key characteristics of metals according to the text?

  • Highly reactive, non-malleable, non-lustrous
  • Ductile, malleable, lustrous, good conductors of heat and electricity (correct)
  • Brittle, non-conductors of heat and electricity
  • Soft, dull, poor conductors of heat and electricity

    • What is the classification of elements into metals and non-metals based on?

  • Physical and chemical properties like lustrousness and conductivity (correct)
  • Ability to conduct electricity
  • Reactivity with water
  • Color

    • How are basic oxides different from amphoteric oxides?

  • Basic oxides form salts with water, while amphoteric oxides dissolve in water
  • Basic oxides are insoluble in water, while amphoteric oxides are highly soluble
  • Basic oxides are acidic in nature, while amphoteric oxides are basic in nature
  • Basic oxides react only with acids, while amphoteric oxides react with both acids and bases (correct)

    • Which statement is true about alloys?

    <p>Alloys are homogeneous mixtures of two or more metals or a metal and a non-metal</p> Signup and view all the answers

    What is the process known as that involves extracting metals from their ores?

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

    What happens when metals above hydrogen in the Activity series come in contact with dilute acids?

    <p>They release hydrogen gas</p> Signup and view all the answers

    What is the purpose of galvanisation?

    <p>To prevent rusting of steel and iron by coating them with zinc</p> Signup and view all the answers

    Why is pure iron not used in its pure state?

    <p>Because it is very soft and stretches easily when hot</p> Signup and view all the answers

    Which of the following is true about stainless steel?

    <p>It is a hard material that does not rust</p> Signup and view all the answers

    What happens to the properties of iron when it is alloyed with a small amount of carbon?

    <p>It becomes harder and stronger</p> Signup and view all the answers

    What is an alloy?

    <p>A mixture of two or more metals or a metal and a nonmetal</p> Signup and view all the answers

    How does alloying affect the properties of metals?

    <p>It changes the properties of metals</p> Signup and view all the answers

    Why are metals high up in the reactivity series obtained by electrolytic reduction?

    <p>Carbon cannot reduce their oxides</p> Signup and view all the answers

    What happens to the metals in the thermit process due to the large amount of heat evolved?

    <p>They melt and are produced in the molten state</p> Signup and view all the answers

    Why can't carbon reduce the oxides of highly reactive metals like sodium, magnesium, and calcium?

    <p>Carbon has a higher affinity for oxygen than these metals</p> Signup and view all the answers

    Which process is used to join railway tracks or cracked machine parts?

    <p>Thermit reaction</p> Signup and view all the answers

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