Chemistry · 2010 · November · Paper 3 · HL · Markscheme

N10/4/CHEMI/HP3/ENG/TZ0/XX/M 21 pages MARKSCHEME November 2010 CHEMISTRY Higher Level Paper 3 – 4 – N10/4/CHEMI/HP3/ENG/TZ0/XX/M 1. Follow the markscheme provided, award only whole marks and mark only in RED. 2. Where a mark is awarded, a tick/check ( /G1) must be placed in the text at the precise point where it becomes clear that the candidate deserves the mark. One tick to be shown for each mark awarded. 3. Sometimes, careful consideration is required to decide whether or not to award a mark. In these cases write a brief annotation to explain your decision. You are en couraged to write comments where it helps clarity, especially for moderation and re-marking. It should be remembered that the script may be returned to the candidate. 4. Unexplained symbols or personal codes/notations are unacceptable. 5. Record marks in the right-hand margin against each mark allocation shown in square brackets e.g. [2]. The total mark for a question must equal the number of ticks for the question. 6. Do not circle sub-totals. Circle the total mark for the question in the right-hand margin at the end of the question. 7. Where an answer to a part question is worth no marks, put a zero in the right-hand margin next to the square bracket. 8. Where work is submitted on additional sheets the marks awarded should be shown as ticks and a note made to show that these marks have been transferred to the appropriate square bracket in the body of the script. 9. For each option: Add the totals for each question in the option and write it in the Examiner column on the front cover. Total: Add the marks awarded and enter this in the box marked TOTAL in the Examiner column on the cover sheet. 10. After entering the marks on the front cover check your addition to ensure that you have not made an error. Check also that you have transferred the marks correctly to the cover sheet. All scripts are checked and a note of all clerical errors will be given in feedback to examiners. 11. If an answer extends over more than one page and no marks have been awarded on a section draw a diagonal line through that section to indicate that it has been marked. 12.