AQA AS Specimen Paper 2 Q6

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Dodecane (C12H26) is a hydrocarbon found in the naphtha fraction of crude oil. Dodecane can be used as a starting material to produce a wide variety of useful products. The scheme in Figure 2 shows how one such product, polymer Y, can be produced from dodecane. 14 Figure 2 Reaction 1 C12H26 C2H4 C4H8 + X Reaction 2 nC4H8 CH3 C CH3 Polymer Y Name the homologous series that both C2H4 and C4H8 belong to. Draw a functional group isomer of C4H8 that does not belong to this homologous series. [2 marks] . 1 0 6 Name Functional group isomer 0 6 0 6 . 2 Identify compound X. . 3 Name polymer Y. [1 mark] [1 mark] Typesetter code Barcode<br /> 15 0 6 . 4 Reaction 1 is an example of thermal cracking and is carried out at a temperature of 750 C. State one other reaction condition needed. . 5 0 6 Reaction 2 is exothermic. A typical compromise temperature of 200 C is used industrially for this reaction. Explain the effect of a change of temperature on both the position of equilibrium and the rate of reaction, and justify why a compromise temperature is used industrially. [1 mark] [6 marks] Barcode Typesetter code Turn over <br />

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