Quelpr

CSEC Chemistry · January 2008 · Paper 2

40 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

Practise this paper
  1. 1(a)(i)7 marksComplete Table 1 below to show, for the concentration of KIO3 solution used, the corresponding times in seconds (s) and the reciprocal times (1/t) at which the blue colour appears.
  2. 1(a)(ii)5 marksUsing the graph paper on page 5, plot the reciprocal of time against the concentration of KIO3.
  3. 1(a)(iii)2 marksExplain the shape of the graph.
  4. 1(b)3 marksComplete Table 2 below for tests carried out on the mixture labelled as Q.
  5. 1(c)(i)2 marksApparatus and materials needed
  6. 1(c)(ii)2 marksDescription of the method to be used
  7. 1(c)(iii)1 markONE variable needed to be controlled
  8. 1(c)(iv)1 markONE precaution to be taken
  9. 1(c)(v)2 marksExpected results
  10. 2(a)(i)1 markWhat is the atomic number of Element Y?
  11. 2(a)(ii)2 marksPlace Elements X and Y in their correct positions on the periodic table in Figure 2.
  12. 2(a)(iii)3 marksExplain why you placed the Elements X and Y in the particular group and period in Figure 2 above.
  13. 2(a)(iv)2 marksClassify X and Y as metals or nonmetals. Give ONE reason for your answer.
  14. 2(b)3 marksBased on the position of X and Y in the periodic table, how will X and Y react with cold water? Give ONE reason for your answer. You should comment on the products formed and the relative rates of the reaction.
  15. 2(c)(i)2 marksWrite a balanced chemical equation for the reaction between X and oxygen.
  16. 2(c)(ii)2 marksWhat type of bond will be formed when X combines with oxygen? Give a reason for your answer.
  17. 3(a)4 marksIdentify the processes which cause the bulbs to light in Experiments I and II. Explain how the processes differ.
  18. 3(b)1 markGive the name of one substance which, if it replaces graphite in Experiment I, would cause the bulb NOT to light when the switch W is closed.
  19. 3(c)(i)4 marksProvide a suitable explanation for the difference observed with Solutions P and Q.
  20. 3(c)(ii)1 markSuggest a suitable substance for Solution Q.
  21. 3(d)(i)4 marksWhat are the names of the parts of the apparatus labelled A and B in Experiment II?
  22. 3(d)(ii)4 marksWhat are the processes occurring at A and B?
  23. 4(a)(i)1 markDraw the fully displayed structural formula for Compound A.
  24. 4(a)(ii)1 markWrite a chemical equation to represent the reaction occurring between Compound A and the bromine solution.
  25. 4(a)(iii)1 markName the type of reaction which occurs when Compound A reacts with bromine.
  26. 4(b)(i)1 markDraw the fully displayed structural formula for Compound B.
  27. 4(b)(ii)1 markWrite a chemical equation to represent the reaction occurring between Compound B and bromine.
  28. 4(b)(iii)1 markName the type of reaction which occurs when Compound B reacts with bromine.
  29. 4(c)(i)3 marksDescribe ONE simple chemical test which can be used in the laboratory to distinguish between Compounds C and D. State the reagent to be used and describe the observations.
  30. 4(c)(ii)2 marksWrite a chemical equation to represent the condensation reaction between Compounds C and D.
  31. 4(c)(iii)a)2 marksWrite a chemical equation to represent the dehydration of Compound C.
  32. 4(c)(iii)b)2 marksIndicate the reagent and reaction conditions for (iii) a) above.
  33. 5(a)(i)a)2 marksName the MAIN components of EACH of the following: Stainless steel
  34. 5(a)(i)b)1 markName the MAIN components of EACH of the following: Duralumin
  35. 5(a)(ii)3 marksState how the properties of alloys are altered when compared to those of the starting materials from which they are made. Explain your answer.
  36. 5(b)(i)a)2 marksSuggest ONE property in EACH case that allows lead to be used as a component in solder
  37. 5(b)(i)b)1 markSuggest ONE property in EACH case that allows lead to be used as protection against X-rays.
  38. 5(b)(ii)a)3 marksList TWO sources of lead as a pollutant.
  39. 5(b)(ii)b)1 markName ONE effect that lead as a pollutant has on the environment.
  40. 5(c)6 marksComplete Table 3 below by writing the chemical formula for ONE oxide of EACH of the elements and give an example of the use of the oxide in industry.

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