Transcription of Chains and Rings Mark Scheme - Past Papers
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Chains and Rings Mark Scheme - Past Papers
1 AS: 2812 January 2001 Chains and Rings Mark Scheme More Past Papers at: 21. (a) (i) OH/hydroxy/hydroxyl/ROH (ii) CnH2n+1OH (iii) C7H15OH / C7H16O (b) 88. (c)(i) 1 mark for plotting the points 1 mark for the line extended to enable of C8H17OH to be estimated. (ii) I butan-1-ol 115 -125 oC II C8H17OH 190 -205 oC (ii) Boiling point increases as the Mr increases/ proportional to Mr.
3 Isomer B C C C CH3 H H H H H H H C 3 Isomer C H C 3 C C CH 3 H H CH 3 H Isomer D H3C C CH 3 CH 3 CH 3 2 (a) contains carbon and hydrogen only separates due to differences in boiling point (b) works out/uses Mr = 156 (ii) 132/156 method mark
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