C2 Topic 3

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The diagrams show the structures of four forms of carbon. Which diagram is the structure of diamond


  • A.
  • B.
  • C.
  • D.

Diamond is a form of carbon. It is hard material and has a very high melting point. It does not conduct electricity when solid. The structure of diamond is

  • A. Ionic
  • B. Metallic
  • C. Giant molecular covalent
  • D. Simple molecular covalent

Graphite conducts electricity. This is because graphite

  • A. Has big molecules that can easily slide over each other
  • B. Has electrons which are free to move through the structure
  • C. Contains ionic bonds
  • D. Is an element

The electron configurations of carbon and oxygen are: Carbon 2.4, oxygen 2.6. Which of the following is the correct dot and cross diagram for a molecule of carbon dioxide ?


  • A.
  • B.
  • C.
  • D.

Carbon dioxide is a simple molecular, covalent compound. Which row shows the relative melting point and electrical conductivity of carbon dioxide ?

  • A. Low relative melting point. Good electrical conductivity
  • B. Low relative melting point. Poor electrical conductivity
  • C. High relative melting point. Good electrical conductivity
  • D. High relative melting point. Poor electrical conductivity