Chemical Reactions Quiz
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Questions and Answers

What is the product formed when magnesium ribbon burns in the presence of oxygen?

  • Magnesium oxide (correct)
  • Magnesium hydroxide
  • Magnesium chloride
  • Magnesium sulfate

    • Which observation helps determine whether a chemical reaction has taken place?

  • Change in volume
  • Evolution of a gas (correct)
  • Change in shape
  • Change in density

    • What happens when dilute hydrochloric acid or sulphuric acid is added to lead nitrate?

  • It becomes transparent
  • It turns red
  • A precipitate forms (correct)
  • It evaporates instantly

    • Which substance is formed when zinc granules react with potassium iodide solution?

    <p>Zinc iodide</p> Signup and view all the answers

    What is the product formed when a magnesium ribbon is burnt in air?

    <p>Magnesium oxide</p> Signup and view all the answers

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