AQA Jun 2012 Paper 1 Q2

Answers available below

compound x is shown below it is a member of a homologous series of hydrocarbons do not write outside the box h h ccch c h a i deduce the general formula of the homologous series that contains x mark a ii name a process used to obtain a sample of x from a mixture containing other members of the same homologous series mark b there are several isomers of x b i give the iupac name of the position isomer of x mark b ii draw the structure of a functional group isomer of x c at high temperatures one molecule of c h can be converted into two molecules of x and one molecule of another compound c i write an equation for this reaction mark mark wmp jun chem do not write outside the box c ii state the name of the process used to obtain a high yield of x from c h give one reason why this process is used in industry name reason marks c iii state why high temperatures are needed for this process mark d compound x can be converted into compound y compound y is shown below hh ccch c h hhh d i suggest the formula of a reagent that could be added to x in order to convert it into y mark d ii give one use of y mark d iii write an equation to show the reaction of y in a limited supply of air to produce a solid and water only mark question continues on the next page turn over wmp jun chem do not write outside the box d iv when a sample of y contaminated with ch sh is burned completely in air a toxic gas is formed identify this toxic gas and suggest a compound that could be used to remove the toxic gas from the products of combustion toxic gas compound used to remove toxic gas marks d v suggest the name of the process that occurs when the toxic gas in part d iv is removed mark e explain why the boiling points of x and y are similar marks wmp jun chem do not write outside the box the following equation shows the reaction of a phosphine molecule ph with an h ion ph h ph a draw the shape of the ph molecule include any lone pairs of electrons that influence the shape mark b state the type of bond that is formed between the ph molecule and the h ion explain how this bond is formed name of bond how bond is formed marks c predict the bond angle in the ph ion mark d although phosphine molecules contain hydrogen atoms there is no hydrogen bonding between phosphine molecules suggest an explanation for this mark turn over wmp jun chem

Show answer