Edexcel Jun 2017 (IAL) Paper 4 Q12

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10 An ionic solid dissolves in water. Which of the following statements about the signs of these standard enthalpy changes is possible? (cid:507)H (cid:57) solution negative positive negative positive (cid:507)H (cid:57) hydration negative negative positive positive Lattice energy positive negative negative positive D O N O T W R I T E I N T H I S A R E A (Total for Question 10 = 1 mark) 11 What is the main reason for hydrogenating vegetable oils for use as low-fat spreads? A To increase the melting temperature. B To decrease the viscosity of the oil. C To prevent oxidation of carbon-carbon double bonds. D To decrease the cholesterol content. (Total for Question 11 = 1 mark) 12 Which of the following statements is true? A A trans fat has hydrogen atoms in the trans positions attached to the carbon-carbon double bonds. B Transesterification always produces esters with hydrogen atoms in the position attached to the carbon-carbon double bonds. trans C But-1-ene has cis and trans isomers. D 1-fluoro-1-chloro-2-bromo-2-iodoethane has cis and trans isomers. Use this space for any rough working. Anything you write in this space will gain no credit. (Total for Question 12 = 1 mark) *P48385A0628* D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A<br />

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