Edexcel Jun 2010 Paper 6 Q2

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PMT 2 P and Q are different organic compounds, each of which has three carbon atoms and only one functional group. (a) Complete the table below by filling in the inferences column. In each case you should state what the test and observation tell you about the original compound P. Inferences about compound P Test Observation (i) Add a small amount of dry phosphorus(V) chloride to 1cm3 of P. Steamy fumes form which turn damp blue litmus paper red. (ii) Add about 2 cm3 of sodium carbonate solution to 1cm3 of P. No reaction occurs. A pale yellow precipitate with an antiseptic smell forms. (iii) Add about 2cm3 of sodium hydroxide solution to 10 drops of P. Then add a solution of iodine in potassium iodide, drop by drop, until the iodine is just in excess. Warm the mixture in a water bath. (iv) Use the information above to identify, by name or formula, the compound P. (1) (1) (1) (1) *N36508A0416*<br /> PMT (v) The mass spectrum of P has a peak at m/e = 45. Identify the species responsible for this peak and explain how this species is formed from P. (2)(b) Complete the table below by filling in the inferences column. Test (i) Add a small amount of dry phosphorus(V) chloride to 1cm3 of Q. Observation Steamy fumes form which turn damp blue litmus paper red. Inferences Steamy fumes areAdd about 2cm3 of sodium carbonate solution to 1cm3 of Q. (ii) Vigorous effervescence occurs and the gas evolved turns limewater milky. Functional group in compound Q is(iii) Use the information above to identify, by name or formula, the compound Q. (1) (1) (1) (Total for Question 2 = 9 marks) *N36508A0516* Turn over<br />

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