Chemical Reactions and Bonds Quiz
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Questions and Answers

What are the starting molecules of a chemical reaction called?

  • Products
  • Neutrons
  • Protons
  • Reactants (correct)
  • Which process involves the conversion of carbon dioxide and water to glucose and oxygen?

  • Oxidation
  • Fermentation
  • Respiration
  • Photosynthesis (correct)
  • What do the opposite-headed arrows in a chemical reaction indicate?

  • Endothermic reaction
  • Irreversible reaction
  • Reversible reaction (correct)
  • Exothermic reaction
  • At chemical equilibrium, what happens to the relative concentrations of reactants and products?

    <p>They remain constant</p> Signup and view all the answers

    Which term refers to the making and breaking of chemical bonds?

    <p>Chemical reactions</p> Signup and view all the answers

    In a chemical equation, what do the numbers in front of the reactants and products represent?

    <p>Number of molecules participating in the reaction</p> Signup and view all the answers

    What type of bond is formed when electrons are not evenly distributed, leading to attractions between molecules that are close together?

    <p>Hydrogen bond</p> Signup and view all the answers

    Which type of interaction involves a hydrogen atom attracted to an electronegative atom in living cells?

    <p>Van der Waals interactions</p> Signup and view all the answers

    What is the resulting charged atom when an electron is stripped by its bonding partner?

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

    Which type of bond involves the attraction between anions and cations?

    <p>Ionic bond</p> Signup and view all the answers

    In which type of reaction can weak bonds provide an advantage due to their reversibility?

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

    Which type of interaction occurs between molecules that are close together as a result of uneven electron distribution?

    <p>Van der Waals interactions</p> Signup and view all the answers

    What is the definition of an element?

    <p>A substance that cannot be broken down into other substances by chemical reactions</p> Signup and view all the answers

    Which of the following elements make up 96% of living matter?

    <p>Carbon, hydrogen, oxygen, nitrogen</p> Signup and view all the answers

    What are trace elements?

    <p>Elements required by an organism in only small amounts</p> Signup and view all the answers

    How would you define compounds?

    <p>Substances consisting of two or more elements in a fixed ratio</p> Signup and view all the answers

    What is the key characteristic of compounds compared to their constituent elements?

    <p>They have different properties from their constituent elements</p> Signup and view all the answers

    Which substances make up the majority of the remaining 4% of living matter?

    <p>Calcium, phosphorus, potassium, sulfur</p> Signup and view all the answers

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