w w ap eP m e tr .X w UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS s er om .c Pre-U Certificate MARK SCHEME for the May/June 2010 question paper for the guidance of teachers 9791 CHEMISTRY 9791/01 Paper 1 (Part A Multiple Choice), maximum raw mark 40 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes must be read in conjunction with the question papers and the report on the examination. • CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the May/June 2010 question papers for most IGCSE, Pre-U, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. Page 2 Mark Scheme: Teachers’ version Pre-U – May/June 2010 Syllabus 9791 Question Number Key Question Number Key 1 2 3 4 5 C B A C C 21 22 23 24 25 C B B C B 6 7 8 9 10 D D D B B 26 27 28 29 30 C D D C C 11 12 13 14 15 D B B C B 31 32 33 34 35 B D C C C 16 17 18 19 20 B C A A B 36 37 38 39 40 C D A D D © UCLES 2010 Paper 01