A Level CHEMISTRY A 2023 Synthesis and analytical techniques (Accurate OCTOBER SESSION) GRADED A+

A Level CHEMISTRY A 2023 Synthesis and analytical techniques (Accurate OCTOBER SESSION) GRADED A+ ANSWERS AT THE LAST PAGE A Level Chemistry A H432/02 Synthesis and analytical techniques Time allowed: 2 hours 15 mi ...

A Level CHEMISTRY A 2023 Synthesis and analytical techniques (Accurate OCTOBER SESSION) GRADED A+ ANSWERS AT THE LAST PAGE A Level Chemistry A H432/02 Synthesis and analytical techniques Time allowed: 2 hours 15 minutes * H 4 3 2 0 2 * 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 You must have: • the Data Sheet for Chemistry A You can use: • a scientific or graphical calculator • an HB pencilgiven for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 100. • 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 32 pages. ADVICE • Read each question carefully before you start your answer.2 © OCR 2023 SECTION A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. Answer all the questions. 1 2-Methylbutane is reacted with chlorine by radical substitution. What is the number of structural isomers with the molecular formula C 5H11Cl that could be formed? A 2 B 3 C 4 D 5 Your answer C [1] 2 Which type(s) of stereoisomerism is/are shown by 2,4-dimethylhex-2-ene? A E/Z isomerism only. B Optical isomerism only. C Both E/Z isomerism and optical isomerism. D Neither E/Z isomerism nor optical isomerism. Your answer B [1] 3 Which sample contains the greatest number of carbon atoms? A 20.0g C6H5OH B 30.0g C2H5COOH C 40.0g CH3CHO D 50.0g CH3O