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EDEXCEL CHEMISTRY 2021 A LEVEL PAPER 2 QP

EDEXCEL CHEMISTRY 2021 A LEVEL PAPER 2 QP • Answer all • • •Please check the examination details below before entering your candidate information Candidate surnameOther names Pearson Edexcel Level 3 GCE Time 1 hour 45 minutes Chemistry Centre Number Candidate Number Paper referenc e 9CH0/ 02 Advanced PAPER 2: Advanced Organic and Physical Chemistry Total Marks Candidates must have: Scientific calculator Data Booklet Ruler Instructions • Use black ink or black ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. • Answer the questions in the spaces provided – there may be more space than you need. Show all your working in calculations and include units where appropriate. Information • The total mark for this paper is 90. The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question. For the question marked with an asterisk (*), marks will be awarded for your ability to structure your answer logically showing the points that you make are related or follow on from each other where appropriate. A Periodic Table is printed on the back cover of this paper. Advice • Read each question carefully before you start to answer • • • • P65464A ©2021 Pearson Education Ltd. 1/1/1/1/1/ it. Check your answers if you have time at the end. Good luck with your examination. Turn over Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 What is the total number of ions in 26.4 g of ammonium sulfate, (NH4)2SO4? [Molar mass of (NH4)2SO4 = 132 g mol−1 Avogadro constant = 6.0 × 1023 mol−1] A 4.0 × 1022 B 1.2 × 1023 C 2.4 × 1023 D 3.6 × 1023 (Total for Question 1 = 1 mark) 2 The equation for the complete combustion of butane is 2C4H10(g) + 13O2(g)  8CO2(g) + 10H2O(l) What is the minimum volume of oxygen, at room temperature and pressure (r.t.p.), needed for the complete combustion of 0.200 mol of butane? [Molar volume of a gas at r.t.p. = 24.0 dm3 mol−1] A 4.8 dm3 B 9.6 dm3 C 31.2 dm3 D 62.4 dm3 (Total for Question 2 = 1 mark) 3 What is the systematic name for tiglic acid? O A E-2-methylbut-2-enoic acid B Z-2-methylbut-2-enoic acid C E-3-methylbut-2-enoic acid D Z-3-methylbut-2-enoic acid OH tiglic acid (Total for Question 3 = 1 mark) 4 This question is about alkenes with the molecular formula C5H10 . (a) Draw the skeletal formulae of three branched chain alkenes with the molecular formula C5H10 .

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