VSEPR theory
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Questions and Answers

What is the bond angle in a molecule with an sp3 hybridized central atom?

  • 120°
  • 90°
  • 180°
  • 109.5° (correct)

    • What is the effect of steric repulsions on the bond angle in a molecule?

  • It decreases the bond angle (correct)
  • It is dependent on the electronegativity of the central atom
  • It has no effect on the bond angle
  • It increases the bond angle

    • How does the number of lone pairs on the central atom affect the bond angle?

  • It is dependent on the hybridization of the central atom
  • It decreases the bond angle (correct)
  • It increases the bond angle
  • It has no effect on the bond angle

    • What is the effect of the electronegativity of the central atom on the bond angle?

    <p>It decreases the bond angle</p> Signup and view all the answers

    How does the electronegativity of the side atoms affect the bond angle?

    <p>It decreases the bond angle</p> Signup and view all the answers

    What is the direction of change in polarisation when the size of the cation increases in a given ionic compound?

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

    Which of the following configurations has greater polarizing power?

    <p>Pseudo inert gas configuration</p> Signup and view all the answers

    What is the order of polarisability of the following anions?

    <p>Cl─ &lt; ClO2─ &lt; ClO3─ &lt; ClO4─</p> Signup and view all the answers

    Why are oxyanions generally less polarisable?

    <p>Because the charge is present on the oxygen atom</p> Signup and view all the answers

    According to Fajan's rule, which of the following statements is true?

    <p>Cations with pseudo inert gas configuration have greater polarizing power</p> Signup and view all the answers

    What is the main factor affecting the melting point of ionic solids?

    <p>Lattice energy</p> Signup and view all the answers

    What is the reason for the fluxional behaviour of PF5?

    <p>Fast exchange between axial and equatorial F atoms</p> Signup and view all the answers

    What is the hybridisation of SF6 in its ground state?

    <p>[Ne] 3s2 3p4</p> Signup and view all the answers

    What is the reason for identical bond lengths in XeOF4?

    <p>sp3d2 hybridisation</p> Signup and view all the answers

    Why does P not form PI6─?

    <p>P cannot accommodate 6 large sized I atoms</p> Signup and view all the answers

    What is the hybridisation of PI5(s)?

    <p>Does not exist</p> Signup and view all the answers

    Which of the following cations has a higher polarizing power?

    <p>Cu+</p> Signup and view all the answers

    Which of the following factors affects the polarization phenomenon?

    <p>Size of the anion</p> Signup and view all the answers

    What is the effect of an increase in the size of the cation on the polarization phenomenon?

    <p>Polarization decreases</p> Signup and view all the answers

    Which of the following statements is true according to Fajan's rule?

    <p>Cations with pseudo inert gas configuration have a higher polarizing power</p> Signup and view all the answers

    Why are oxyanions generally less polarizable?

    <p>Due to the presence of a small-sized oxygen atom</p> Signup and view all the answers

    Which of the following statements about the polarizing power of a cation is true?

    <p>It increases with the increase in size of the cation.</p> Signup and view all the answers

    What is the effect of the number of lone pairs on the central atom on the polarisability of the molecule?

    <p>It increases the polarisability.</p> Signup and view all the answers

    Which of the following is an example of a molecule with high % s character occupied by a lone pair?

    <p>SF6</p> Signup and view all the answers

    What is the effect of the electronegativity of the central atom on the bond angle in a molecule?

    <p>It decreases the bond angle.</p> Signup and view all the answers

    What is the main factor affecting the polarisability of an anion?

    <p>Size of the anion</p> Signup and view all the answers

    What is the primary reason for the decrease in bond angle in a molecule with the same hybridization and number of lone pairs on the central atom?

    <p>Increase in the steric repulsions between the side atoms</p> Signup and view all the answers

    Which of the following statements is true according to Fajan's rule?

    <p>Polarisability of an anion increases with an increase in its size</p> Signup and view all the answers

    What is the effect of the electronegativity of the side atoms on the bond angle in a molecule?

    <p>The bond angle increases with an increase in the electronegativity of the side atoms</p> Signup and view all the answers

    What is the primary factor affecting the polarisability of an anion?

    <p>Size of the anion</p> Signup and view all the answers

    Which of the following is an example of a polarization phenomenon?

    <p>Deformation of an anion by a cation</p> Signup and view all the answers

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