Chemical Reactions and Equations
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Questions and Answers

Which of the following is an example of a chemical change?

  • Food cooked (correct)
  • Milk left at room temperature during summers
  • An iron tawa/pan/nail left exposed to humid atmosphere
  • Food digested in our body

    • What is the main difference between a physical change and a chemical change?

  • Physical changes only involve a change in appearance, while chemical changes involve a change in composition (correct)
  • Physical changes involve a change in the composition of the substance, while chemical changes do not
  • Physical changes are reversible, while chemical changes are irreversible
  • Physical changes occur only at high temperatures, while chemical changes occur at any temperature

    • What happens when grapes get fermented?

  • Chemical change (correct)
  • Depends on the temperature
  • No change
  • Physical change

    • What is the purpose of Activity 1.1 mentioned in the text?

    <p>To explain the difference between physical and chemical changes</p> Signup and view all the answers

    What is the main difference between a chemical reaction and a physical change?

    <p>Chemical reactions involve a change in the composition of the substance, while physical changes do not</p> Signup and view all the answers

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