AS/A Level Chemistry (A) specimen question papers …

1 OCR advanced SUBSIDIARY GCE. IN Chemistry (3882). OCR advanced GCE. IN Chemistry ( 7882 ). specimen question papers and Mark Schemes These specimen assessment materials are designed to accompany the OCR advanced Subsidiary GCE. and advanced GCE specifications in Chemistry for teaching from September 2000. Centres are permitted to copy material from this booklet for their own internal use. The GCE awarding bodies have prepared new specifications to incorporate the range of features required by new GCE and subject criteria. The specimen assessment material accompanying the new specifications is provided to give centres a reasonable idea of the general shape and character of the planned question papers in advance of the first operational examination specimen Materials 1 OCR 2000.

2 Chemistry Oxford, Cambridge and RSA Examinations CONTENTS. advanced Subsidiary GCE. Unit 2811: Foundation Chemistry question Paper Page 5. Mark Scheme Page 17. Assessment Grid Page 24. Unit 2812: Chains and Rings question Paper Page 27. Mark Scheme Page 39. Assessment Grid Page 47. Unit 2813: Component 01, How Far, How East? question Paper Page 49. Mark Scheme Page 59. Assessment Grid Page 64. Unit 2813: Component 03, Practical Examination 1. OCR-Set Planning Task Page 65. question Paper Page 67. Mark Scheme Page 73. Assessment Grid Page 78.

3 A2. Unit 2814: Chains, Rings and Spectroscopy question Paper Page 79. Mark Scheme Page 91. Assessment Grid Page 99. Unit 2815: Component 01:Trend and Patterns question Paper Page 101. Mark Scheme Page 107. Assessment Grid Page 110. Unit 2815: Component 02: Biochemistry question Paper Page 111. Mark Scheme Page 119. Assessment Grid Page 123. Unit 2815: Component 03: Environmental Chemistry question Paper Page 125. Mark Scheme Page 133. Assessment Grid Page 136. Unit 2815: Component 04: Methods of Analysis and Detection question Paper Page 137.

4 Mark Scheme Page 147. Assessment Grid Page 152. specimen Materials 2 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations Unit 2815: Component 05: Gases, Liquids and Solids question Paper Page 153. Mark Scheme Page 159. Assessment Grid Page 164. Unit 2815: Component 06: Transition Elements question Paper Page 165. Mark Scheme Page 173. Assessment Grid Page 177. Unit 2816: Component 01: Unifying Concepts in Chemistry question Paper Page 179. Marks Scheme Page 187. Assessment Grid Page 191. Unit 2816: Component 03: Practical Examination 2.

5 OCR-Set Planning Task Page 193. question Paper Page 195. Mark Scheme Page 203. Assessment Grid Page 208. specimen Materials 3 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations specimen Materials 4 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations Oxford Cambridge and RSA Examinations advanced Subsidiary GCE. Chemistry . FOUNDATION Chemistry 2811. specimen Paper Additional materials: Answer paper TIME 1 hour 30 minutes INSTRUCTIONS TO CANDIDATES. Write your name, Centre number and candidate number in the spaces provided on the answer booklet.

6 Write all your answers on the separate answer paper provided. If you use more than one sheet of paper, fasten the sheets together. Answer all questions. INFORMATION FOR CANDIDATES. The number of marks is given in brackets [ ] at the end of each question or part question . You will be awarded marks for the quality of written communication where an answer requires a piece of extended writing. In this paper you are expected to show your knowledge and understanding of different aspects of Chemistry and the connections between them. The total mark for this paper is 90.

7 specimen Materials 5 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations Answer all questions. 1. Potassium was discovered and named in 1807 by the British chemist Sir Humphrey Davy. The mass spectrum of a sample of potassium is shown below: 100. 80. 60. % composition 40. 20. 0. 35 40 45 50. relative isotopic mass (a) Use this mass spectrum to complete the table below to show the percentage composition and atomic structure of each potassium isotope in the sample. isotope percentage protons neutrons electrons composition 39.

8 K. 41. K. [4]. (b) (i) The relative atomic mass of the potassium sample can be determined from its mass spectrum. Explain what you understand by the term relative atomic mass.. (ii) Calculate the relative atomic mass of the potassium sample. [3]. (c) Complete the electronic configuration of a potassium atom below. 1s2 .. [1]. specimen Materials 6 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations (d) The first and second ionisation energies of potassium are shown in the table below: ionisation 1st 2nd ionisation energy/kJ mol 1 419 3051.

9 (i)Explain what you understand by the term first ionisation energy of potassium.. (ii) Why is there a large difference between the values for the first and the second ionisation energies of potassium? .. [6]. [Total: 14]. 2. Lead compounds are extensively used to provide the colour in paints and pigments. (a) White lead', used for over 2000 years as a white pigment, is based upon lead carbonate. Analysis shows that lead carbonate has the following percentage composition by mass: Pb, ; C, ; O, Calculate the empirical formula of lead carbonate.

10 [Ar: C, ; O, ; Pb, ]. [3]. (b) Red lead', is the pigment in paint used as a protective coating for structural iron and steel. It is based upon lead oxide Pb3 O4 , a scarlet powder formed by oxidising lead(II) oxide with oxygen. (i) Balance the equation for the oxidation of PbO. PbO (s) + O2 (g) Pb3 O4 (s). specimen Materials 7 OCR 2000. Chemistry Oxford, Cambridge and RSA Examinations (ii) What is the molar mass of Pb3 O4? [Ar: O, ; Pb, ]. (iii) Calculate the mass of Pb3O4 that could be formed from mol of PbO. [4]. [Total: 7]. 3. (a) Showing outer electron shells only, draw dot-and-cross' diagrams to show the bonding in ammonia and water.