Please write clearly in black ink. Do not write in the barcodes. First name(s) Last name Centre number Candidate number OCR is an exempt Charity Turn over *H43303* You must have: • the Practical Insert (inside this document) • the Data Sheet for Chemistry B You can use: • a scientific or graphical calculator • an HB pencil *9902070604* INSTRUCTIONS • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 60. • The marks for each question are shown in brackets [ ]. • Quality of extended response will be assessed in questions marked with an asterisk (*). • This document has 16 pages. ADVICE • Read each question carefully before you start your answer