2 Naming organic chemicals

 

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Oxford Textbook Pages : 181 - 185

CGP Revision Guide Pages : 129

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Show Specification Ref : 3.3.1.1

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Question 1 / 5

AQA Jun 2010 Paper 1 Q6 do not write outside the box pent ene is a member of the alkene homologous series a pent ene can be separated from other alkenes state the physical property of alkenes that allows them to be separated from a mixture by fractional distillation mark b i state the meaning of the term structural isomerism marks b ii name the branched chain isomer of pent ene shown below ch ch cc mark b iii draw the structure of a functional group isomer of pent ene mark wmp jun chem do not write outside the box c the cracking of one molecule of compound x produces pent ene ethene and butane in a mol ratio deduce the molecular formula of x and state a use for the ethene formed molecular formula of x use of ethene marks turn over for the next question turn over wmp jun chem section b answer all questions in the spaces provided do not write outside the box iodine and graphite are both solids when iodine is heated gently a purple vapour is seen graphite will not melt until the temperature reaches k graphite conducts electricity but iodine is a very poor conductor of electricity a state the type of crystal structure for each of iodine and graphite marks b describe the structure of and bonding in graphite and explain why the melting point of graphite is very high marks extra space wmp jun chem
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Question 2 / 5

AQA Jun 2012 Paper 1 Q2 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
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Question 3 / 5

AQA Jun 2010 Paper 2 Q6 the alkene z methylpent ene reacts with hydrogen bromide as shown below do not write outside the box ch ch ch c c ch hbr hbr ch ch br ch ch ch major product p minor product q a i name the major product p mark a ii name the mechanism for these reactions mark a iii draw the displayed formula for the minor product q and state the type of structural isomerism shown by p and q displayed formula for q type of structural isomerism marks a iv draw the structure of the e stereoisomer of methylpent ene mark wmp jun chem do not write outside the box b the infrared spectra of two compounds r and s are shown below r and s have the molecular formula c h and are structural isomers of methylpent ene r is an unsaturated hydrocarbon and s is a saturated hydrocarbon spectrum transmittance wavenumber cm spectrum transmittance wavenumber cm b i identify the infrared spectrum or that represents compound r use information from the infrared spectra to give one reason for your answer you may find it helpful to refer to table on the data sheet r is represented by spectrum reason marks b ii state the type of structural isomerism shown by r and s mark b iii name one possible compound which could be s mark turn over wmp jun chem
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Question 4 / 5

AQA Jun 2015 Paper 2 Q8 section b do not write outside the box answer all questions in the spaces provided consider the following scheme of reactions ch reaction ch h c c ch ch h c c chcl ch reaction ch ch ch reaction h c c ch nh ch ch a give the iupac name for compound p and that for compound q marks p q wmp jun chem do not write outside the box b the conversion of p into q in reaction uses hcl name and outline a mechanism for this reaction marks c the conversion of q into r in reaction uses nh name and outline a mechanism for this reaction marks question continues on the next page turn over wmp jun chem do not write outside the box d state the type of reaction shown by reaction identify a reagent for this reaction give one condition necessary for a high yield of product when q is converted into p marks e hydrogen bromide hbr could be used in the overall conversion of p into r instead of using hcl hydrogen bromide is made by the reaction of nabr with concentrated phosphoric acid concentrated sulfuric acid is not used to make hbr from nabr write an equation for the reaction of nabr with h po to produce hbr and na po only identify two toxic gases that are formed together with hbr when nabr reacts with concentrated h so state the role of h so in the formation of these two toxic gases marks wmp jun chem
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Question 5 / 5

AQA Jan 2010 Paper 4 Q5 areas outside the box will not be scanned for marking the triester t shown below is found in palm oil when t is heated with an excess of sodium hydroxide solution the alcohol glycerol is formed together with a mixture of three other products as shown in the following equation ch ooc ch ch chooc ch ch ch ch ch ch ooc ch ch ch ch coona ch oh naoh choh ch ch ch ch ch coona ch ch coona ch oh glycerol a i give the iupac name for glycerol mark a ii give a use for the mixture of sodium salts formed in this reaction mark b when t is heated with an excess of methanol glycerol is formed together with a mixture of methyl esters b i give a use for this mixture of methyl esters mark b ii one of the methyl esters in the mixture has the iupac name methyl z octadec enoate draw two hydrogen atoms on the diagram below to illustrate the meaning of the letter z in the name of this ester mark wmp jan chem b iii one of the other methyl esters in the mixture has the formula ch ch cooch write an equation for the complete combustion of one molecule of this ester mark areas outside the box will not be scanned for marking turn over for the next question turn over wmp jan chem
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