CIE Jun 2013 v3 Paper 4 Q4

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Examiners For Use Because of the lack of reactivity of the nitrogen molecule, extreme conditions need to be used to synthesise ammonia from nitrogen in the Haber process. (a) Suggest an explanation for the lack of reactivity of the nitrogen molecule, N2.[1] (b) Under conditions of high temperature, nitrogen and oxygen react together to give oxides of nitrogen. (i) Write an equation for a possible reaction between nitrogen and oxygen.(ii) State two situations, one natural and one as a result of human activities, in which nitrogen and oxygen react together.(iii) What is the main environmental effect of the presence of nitrogen oxides in the atmosphere?[4] (c) Describe and explain how the basicities of ethylamine and phenylamine compare to that of ammonia.[4]UCLES 2013 9701/43/M/J/13<br /> (d) Compound X is a useful intermediate in the synthesis of pharmaceuticals. X can be synthesised from chloromethylbenzene according to the following scheme. CH2Cl step 1 CH2CN step 2 CH2CO2H step 3 step 4 Examiners For Use step 5 CH2CH2NH CH2 C O (i) What type of reaction is each of the following? step 1step 2(ii) Suggest reagents and conditions for step 1,step 2.(iii) Draw the structures of the intermediates T and W in the boxes above. [6] [Total: 15]UCLES 2013 9701/43/M/J/13 [Turn over<br />

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