Chemical Reactions Involving Water Quiz
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Questions and Answers

What is the term for the tendency of water molecules to stick together?

  • Hydrogen bonding
  • Surface tension
  • Cohesion (correct)
  • Adhesion
  • Why can a glass be filled to the brim without water overflowing?

  • Due to adhesion properties
  • Due to low surface tension
  • Because of cohesion properties (correct)
  • Because water is a solvent
  • Which category of substances dissolve in water and are considered water-fearing?

  • Hydrogen bonding substances
  • Water-loving substances
  • Hydrophobic substances (correct)
  • Hydrophilic substances
  • What property of water explains why coastal climates tend to be mild?

    <p>Resistance to temperature changes (B)</p> Signup and view all the answers

    What happens to the distance between water molecules when water freezes?

    <p>Distance increases due to stable hydrogen bonds (D)</p> Signup and view all the answers

    Which factor contributes to the ability of water to resist temperature changes?

    <p>High heat capacity (A)</p> Signup and view all the answers

    What is the term for the ability of water to form hydrogen bonds with substances other than water?

    <p>Adhesion (A)</p> Signup and view all the answers

    What does electronegativity measure?

    <p>The atom's ability to attract electrons (D)</p> Signup and view all the answers

    Which element has high electronegativity compared to Sodium?

    <p>Oxygen (D)</p> Signup and view all the answers

    What type of bond is created when one atom transfers electrons to another?

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

    In which type of bond do atoms share electrons?

    <p>Covalent bond (A)</p> Signup and view all the answers

    What is the main attractive force that holds atoms together in a compound?

    <p>Chemical bond (C)</p> Signup and view all the answers

    Which type of chemical bond involves partial charges on adjacent polar molecules?

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

    Elements with high electronegativity tend to:

    <p>Strip electrons away from those with lower values (A)</p> Signup and view all the answers

    What is the term for an atom's outermost occupied shell?

    <p>'Valence' shell (D)</p> Signup and view all the answers

    What is the defining characteristic of an acidic solution?

    <p>pH lower than 7 (D)</p> Signup and view all the answers

    Which type of organic molecules consist of a carbon backbone and a Functional Group?

    <p>Proteins (A)</p> Signup and view all the answers

    What do plants and autotrophs do with regard to organic molecules?

    <p>Produce their own organic molecules (A)</p> Signup and view all the answers

    Which type of organic molecules are predominantly composed of Carbon and Hydrogen?

    <p>Hydrocarbons (D)</p> Signup and view all the answers

    What determines the physical, chemical, and solubility properties of a specific organic compound?

    <p>Functional Group (B)</p> Signup and view all the answers

    Which type of solution has a pH greater than 7?

    <p>Alkaline (C)</p> Signup and view all the answers

    What are the four most abundant types of organic molecules in organisms?

    <p>Carbohydrates, Lipids, Proteins, Nucleic Acids (A)</p> Signup and view all the answers

    Where do heterotrophs like humans obtain their organic building blocks?

    <p>From food (A)</p> Signup and view all the answers

    What happens in a chemical reaction?

    <p>Two or more molecules combine to form entirely new molecules (B)</p> Signup and view all the answers

    What can happen if there is too much or too little H+ ions inside a cell?

    <p>The shape of critical molecules is ruined, rendering them nonfunctional (B)</p> Signup and view all the answers

    What happens when a water molecule spontaneously breaks into two pieces?

    <p>It yields H+ ion and OH- ion (A)</p> Signup and view all the answers

    How does an acid affect the concentration of ions in a solution?

    <p>Increases the concentration of H+ ions (D)</p> Signup and view all the answers

    What does a pH scale measure?

    <p>Concentration of H+ ions in a solution (C)</p> Signup and view all the answers

    What pH value represents a neutral solution?

    <p>7 (A)</p> Signup and view all the answers

    What role do Hydrogen ions play in affecting cellular functions?

    <p>Disturb the chemical balance within cells (A)</p> Signup and view all the answers

    Why is it important for cells to have an optimum pH?

    <p>To maintain the proper shape and function of cellular molecules (A)</p> Signup and view all the answers

    What type of organic compounds consist largely of the four main types of organic compounds: carbohydrates, proteins, nucleic acids, and lipids?

    <p>All organisms (D)</p> Signup and view all the answers

    What is the chemical reaction called when monomers are linked into polymers by removing an -OH group from one molecule and a hydrogen atom from another to form water?

    <p>Dehydration synthesis (C)</p> Signup and view all the answers

    Which type of carbohydrates usually contain five or six carbon atoms and have a ratio of C:H:O = 1:2:1?

    <p>Simple Carbohydrates (sugars) (B)</p> Signup and view all the answers

    What property do proteins, nucleic acids, and some carbohydrates share in common?

    <p>They are polymers (A)</p> Signup and view all the answers

    What type of chemical reaction breaks the covalent bonds linking monomers in a polymer by using atoms from water?

    <p>Hydrolysis (A)</p> Signup and view all the answers

    Which term refers to the small groups of atoms that participate in the reactions creating life's large organic molecules?

    <p>Functional groups (D)</p> Signup and view all the answers

    In carbohydrates, what type of molecules consist of carbon, hydrogen, and oxygen often in a proportion 1:2:1?

    <p>Carbohydrates (A)</p> Signup and view all the answers

    What are the two main groups of carbohydrates based on their complexity?

    <p>Simple Carbohydrates (sugars) and Polysaccharides (B)</p> Signup and view all the answers

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