Chemistry: Covalent Bonds and Valency Quiz
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Chemistry: Covalent Bonds and Valency Quiz

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Questions and Answers

What is the primary reason for the polarity in the bond between the hydrogen atom and oxygen atom in a water molecule?

  • Hydrogen and oxygen atoms have the same electronegativity values.
  • The difference in electronegativity between hydrogen and oxygen is greater than 0.5. (correct)
  • Hydrogen and oxygen atoms form an ionic bond.
  • The difference in electronegativity between hydrogen and oxygen is less than 0.5.

    • Which of the following statements about the carbon-hydrogen (C-H) bond is correct?

  • The C-H bond is polar covalent because the difference in electronegativity is greater than 0.5.
  • The C-H bond is ionic because carbon and hydrogen have the same electronegativity values.
  • The C-H bond is a strong bond that is not easily disturbed.
  • The C-H bond is non-polar covalent because the difference in electronegativity is less than 0.5. (correct)

    • What is the primary reason for the strength of an ionic bond?

  • The atoms involved in the bond have the same electronegativity values.
  • The bond is formed by the transfer of electrons from one atom to another.
  • The atoms involved in the bond are in their ionic state (positively or negatively charged). (correct)
  • The bond is not easily disturbed and remains strong as long as it is not disrupted.

    • What happens to the ionic bond between sodium (Na) and chlorine (Cl) when water is added to sodium chloride (NaCl)?

    <p>The ionic bond becomes weaker and more fragile, eventually breaking apart.</p> Signup and view all the answers

    What is the relationship between the difference in electronegativity and the type of bond formed between two atoms?

    <p>A difference in electronegativity of 0.5 or more results in a polar covalent bond.</p> Signup and view all the answers

    Which of the following statements about the carbon-oxygen (C-O) bond is correct?

    <p>The C-O bond is polar covalent because the difference in electronegativity is greater than 0.5.</p> Signup and view all the answers

    What is the primary factor that determines the strength of an ionic bond?

    <p>The ability of the atoms to form positive and negative ions.</p> Signup and view all the answers

    Which of the following statements about the valency of an atom is correct?

    <p>Valency is the number of covalent bonds an atom can form with other atoms.</p> Signup and view all the answers

    How does the strength of a covalent bond compare to the strength of an ionic bond?

    <p>Ionic bonds are generally stronger than covalent bonds.</p> Signup and view all the answers

    What is the primary difference between a polar covalent bond and a non-polar covalent bond?

    <p>Polar covalent bonds involve the unequal sharing of electrons, while non-polar covalent bonds involve the equal sharing of electrons.</p> Signup and view all the answers

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