Chemical Reactions and Equations: Chapter 1 Quiz
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Questions and Answers

Which statement best describes the relationship between chemical changes and chemical reactions?

  • A chemical change can occur without a chemical reaction.
  • Chemical changes are reversible, but chemical reactions are not.
  • Chemical reactions and chemical changes are interchangeable terms.
  • Chemical reactions always lead to chemical changes. (correct)

    • Why is it important to wear suitable eyeglasses during Activity 1.1?

  • To show respect for the teacher's instructions.
  • To look more scientific and professional.
  • To avoid eye injuries from any splashes or debris. (correct)
  • To improve vision while performing the experiment.

    • What type of chemical reaction is taking place when barium chloride and sodium sulphate react to give barium sulphate and sodium chloride?

  • Combination reaction
  • Redox reaction
  • Decomposition reaction
  • Double displacement reaction (correct)

    • In the reaction between sodium hydroxide and hydrochloric acid, what are the products formed?

    <p>Sodium chloride and water</p> Signup and view all the answers

    In a redox reaction, which of the following statements is TRUE?

    <p>Both oxidation and reduction are occurring simultaneously</p> Signup and view all the answers

    What happens to atoms during a chemical reaction?

    <p>Atoms do not change into those of another element</p> Signup and view all the answers

    Which type of reaction involves the breaking and making of bonds between atoms to produce new substances?

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

    What is the product formed when calcium oxide reacts with water?

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

    In the reaction between Zinc and Silver nitrate, which element is oxidized?

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

    Which of the following reactions is an example of an endothermic reaction?

    <p>Zinc carbonate → Zinc oxide + Carbon dioxide</p> Signup and view all the answers

    What type of reaction is represented by the equation: Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)?

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

    Which of the following reactions represents a displacement reaction?

    <p>Zinc + Silver nitrate → Zinc nitrate + Silver</p> Signup and view all the answers

    Which of the following is a decomposition reaction where energy is supplied in the form of light?

    <p>$2HgO(s) ightarrow 2Hg(l) + O_2(g)$</p> Signup and view all the answers

    What type of reaction involves the formation of a solid product known as a precipitate?

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

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