Chemistry 9701 · AS & A Level · Chemical bonding

Chemical bonding — practice question

At $200\,^{\circ}\text{C}$, aluminium chloride exists as a gas with $M_r = 267$. How many covalent bonds, dative covalent bonds and lone pairs of electrons are present in one molecule of aluminium chloride at $200\,^{\circ}\text{C}$?

  • A6 covalent bonds, 2 dative covalent bonds, 0 lone pairs
  • B6 covalent bonds, 2 dative covalent bonds, 16 lone pairs
  • C6 covalent bonds, 2 dative covalent bonds, 18 lone pairs
  • D3 covalent bonds, 0 dative covalent bonds, 9 lone pairs

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