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2 marksStructure and Formulae

CAPE Chemistry Unit 2 · 2007 · Paper 2 · Question 7(a)

Properties of Group IV elements and their compounds.

Describe the trend in electrical conductivities of Group IV elements and relate it to their physical structure.

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Other parts of this question

  1. 7(b)(i)State the type of bonding found in CO2.[1 mark]
  2. 7(b)(ii)State the type of bonding found in SiO2.[1 mark]
  3. 7(b)(iii)State the type of bonding found in GeO2.[1 mark]
  4. 7(b)(iv)State the type of bonding found in PbO2.[1 mark]
  5. 7(c)Classify the acid/base character of the Group IV dioxides and explain how it relates to the type of bonding.[4 marks]
  6. 7(d)Use the provided standard electrode potentials to comment on the relative stability of the +4 and +2 oxidation states of Ge, Sn, and Pb.[2 marks]
  7. 7(e)Explain why Sn2+ ions will reduce orange Cr2O7^2- to green Cr3+ but Pb2+ ions will not, referencing standard electrode potentials and using suitable…[4 marks]
  8. 7(f)Explain why silicon tetrachloride (SiCl4) fumes and forms a white precipitate with water while carbon tetrachloride (CCl4) is immiscible with water, and write…[4 marks]

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