Displacement Reactions and Rust Prevention Quiz for Class X
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Questions and Answers

Why are food cans coated with tin and not with zinc?

  • Zinc is more reactive than tin. (correct)
  • Zinc has a higher melting point than tin.
  • Zinc is costlier than tin.
  • Zinc is less reactive than tin.

    • Which of the following pairs will give displacement reactions?

  • AgNO3 solution and copper metal (correct)
  • FeSO4 solution and silver metal
  • MgCl2 solution and aluminium metal
  • NaCl solution and copper metal

    • Which method is suitable for preventing an iron frying pan from rusting?

  • Applying a coating of zinc (correct)
  • Applying grease
  • Applying paint
  • Applying a coating of copper

    • An element reacts with oxygen to give a compound with a high melting point and is soluble in water. The element is likely to be:

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

    How could you use a hammer, a battery, a bulb, wires, and a switch to distinguish between samples of metals and nonmetals?

    <p>Connect the sample to the circuit and observe if the bulb lights up.</p> Signup and view all the answers

    In a population of an asexually reproducing species, if trait A exists in 10% and trait B exists in 60%, which trait is likely to have arisen earlier?

    <p>Trait B</p> Signup and view all the answers

    How do variations in a species promote survival?

    <p>Variations help in the survival of the species by enabling some individuals to adapt to drastic environmental changes</p> Signup and view all the answers

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