Chemistry Advanced PAPER 2: Advanced Organic and Physical Chemistry./ Pearson Edexcel Level 3 GCE. DOWNLOAD FOR EASY REVISION

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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 Wha... t 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 OH tiglic acid 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 (Total for Question 3 = 1 mark)*P65464A0328* Turn over 3 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 . (3)4 *P65464A0428* (b) Which of these compounds would form pent-2-ene only, when reacted with concentrated phosphoric acid, H3PO4? (1) A CH3CH(OH)CH(CH3)2 B CH2(OH)CH2CH2CH2CH3 C CH3CH2CH2CH(OH)CH3 D CH3CH2CH(OH)CH2CH3 (c) Pent-2-ene reacts with hydrogen bromide, HBr, to form two bromoalkanes. Complete the diagram to show the mechanism for the formation of 2-bromopentane in this reaction. Include curly arrows, and relevant lone pairs and dipoles. (4) H [Show More]

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