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1 markAcids, Bases, Mixtures and Household Chemicals

CSEC Integrated Science · 2009 · Paper 2 · Question 4(a)(iii)

A laboratory fractional distillation apparatus is shown with labelled sections A, B, and C.

The distillation flask contains liquids W (b.p. 180 °C), X (b.p. 60 °C) and Y (b.p. 100 °C). Which will be collected in the receiver first?

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Other parts of this question

  1. 4(a)(i)List the physical states of the materials usually present in Section A.[1 mark]
  2. 4(a)(ii)Name the process occurring in each of the labelled sections: B and C.[2 marks]
  3. 4(b)(i)State one major environmental concern associated with using fossil fuels.[1 mark]
  4. 4(b)(ii)State one reason which may limit the use of solar energy in the Caribbean.[1 mark]
  5. 4(c)(i)Which method of heat transfer is most important for this solar water heater to operate?[1 mark]
  6. 4(c)(ii)Why did the builder paint the exterior of the water heater black?[1 mark]
  7. 4(c)(iii)Would you expect to find hotter water at the top or at the bottom of the heater?[1 mark]
  8. 4(c)(iv)Give one reason for your answer to (c)(iii).[1 mark]
  9. 4(c)(v)a)Should the covering for the water heater be made from metal, transparent glass or plastic?[1 mark]
  10. 4(c)(v)b)Give one reason for your choice of covering material in (v) a).[1 mark]
  11. 4(c)(vi)Suggest one appropriate use of the water from the solar water heater.[1 mark]
  12. 4(c)(vii)Suggest two reasons for using a solar water heater instead of a gas heater or an electric heater.[2 marks]

More practice: the rest of this paper · more Acids, Bases, Mixtures and Household Chemicals questions · all CSEC Integrated Science past papers