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International A LevelChemistryEdexcelExam Questions1. Structure, Bonding & Introduction to Organic Chemistry1.7 Covalent Bonding & Structure

Covalent Bonding & Structure (Edexcel International A Level Chemistry)

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1.7 Covalent Bonding & Structure

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1.7 Covalent Bonding & Structure

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11 mark

Which substance has a giant lattice of atoms?

  • diamond

  • ice

  • poly(ethene)

  • sodium chloride

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21 mark

Which molecule is planar?

  • CF4

  • C2F4

  • PF5

  • SF6

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11 mark

The hydrogen ion, H+, bonds to a water molecule forming an H3O+ ion.

For H3O+, what shape and H-O-H bond angle are predicted by the electron-pair repulsion theory?

  • trigonal planar 120°

  • trigonal planar 117.5°

  • trigonal pyramidal 107°

  • trigonal pyramidal 104.5°

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21 mark

Which of these molecules is not polar?

  • CO2

  • HCl

  • H2O

  • NH3

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31 mark

Which row gives the correct polarities of the S—F bond and the SF6 molecule?

(1)

      Polarity of S—F bond Polarity of SF6 molecule
  ☐ A polar polar
  ☐ B polar non-polar
  ☐ C non-polar polar
  ☐ D non-polar non-polar

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    41 mark

    Which compound has bonds that are the most polar?

    • H2O

    • H2S

    • NH3

    • PH3

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    51 mark

    Which of these molecules is the most polar?

    • HF

    • OF2

    • BF3

    • CF4

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