AQA Jun 2012 Paper 1 Q3

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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 do not write outside the box a graphene is a new material made from carbon atoms it is the thinnest and strongest material known graphene has a very high melting point and is an excellent conductor of electricity part of the structure of graphene is illustrated in the diagram a i deduce the type of crystal structure shown by graphene mark a ii suggest why graphene is an excellent conductor of electricity marks a iii explain in terms of its structure and bonding why graphene has a high melting point marks wmp jun chem

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