Grade 11 Physical Sciences June 2024 Quiz
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Questions and Answers

Which of the following compounds has an ideal molecular structure as determined by VSEPR?

  • CH(OH)2
  • PCl5
  • H2SO4
  • SF6 (correct)
  • Choose the correct statement regarding the polarity as well as the molecular shape of the BCl3 molecule.

  • The molecule has a trigonal planar shape and is nonpolar. (correct)
  • The molecule has a trigonal planar shape and is polar.
  • The molecule has a linear shape and is nonpolar.
  • The molecule has an angular shape and is highly polar.
  • XY, is an imaginary polar molecule. Which of the following statements is true?

  • X and Y's electronegativities are always the same.
  • The shared electrons will always be closer to Y.
  • X's electronegativity will always be greater than that of Y. (correct)
  • X and Y are both nonmetals.
  • CO2(s) sublimates easily. The intermolecular forces present are:

    <p>London forces</p> Signup and view all the answers

    Which of the following has the weakest forces between the molecules of a pure sample of the substance?

    <p>F2</p> Signup and view all the answers

    When connecting a 4 Ω resistor directly over the terminals of a 12 V battery without internal resistance, the amount of charge passing a point per second is:

    <p>3</p> Signup and view all the answers

    The potential difference between any two points in a circuit is the:

    <p>amount of work done per coulomb charge moving between the two points.</p> Signup and view all the answers

    Which of the following is the unit of measurement for the rate at which electrical energy is converted?

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

    Study Notes

    Molecular Structure and Polarity

    • VSEPR determines the ideal molecular structure, which is exhibited by compounds like PCl5 and SF6.
    • BCl3 has a trigonal planar shape and is nonpolar.
    • In a polar molecule like XY, X's electronegativity is not always greater than Y's, and the shared electrons are not always closer to Y.

    Intermolecular Forces

    • CO2(s) sublimates easily due to the presence of London forces.
    • The strength of intermolecular forces between molecules of a pure sample increases in the order: F2 < Cl2 < Br2 < I2.

    Electric Circuits

    • When a 4 Ω resistor is connected directly to a 12 V battery, the amount of charge passing a point per second is 3 A.
    • The potential difference between two points in a circuit is the amount of work done per coulomb charge moving between the two points.
    • The unit of measurement for the rate at which electrical energy is converted is the Watt (W).

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    Description

    This quiz assesses knowledge of molecular structures and polarity in Grade 11 Physical Sciences. It covers topics such as VSEPR and molecular shapes.

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