14. Hydrocarbons
A section of Chemistry, 9701
Listing 10 of 313 questions
Some reactions of compoundG are shown. OH H O G OH HO O reaction 3 reaction 4 H2SO4, heat under reflux HOOC(CH2)2COOH Tollens’ reagent reaction 2 reaction 1 Na H O O State the type of reaction that occurs in reaction1. Suggest the reagentand conditions required for reaction1. Draw the structure of the organic product, H, from reaction2.  State what you would observe in reaction3. Give the type of reaction shown by reaction4. G and J are structural isomers of each other. OH H O G H O OH J Name the type of structural isomerism shown by G and J. Suggest one chemical test that can distinguish G from J. Give the result of the test with each compound. test result with G result with J  In the reaction schemes below, G and J are converted into organic compoundK. G K NaBH4 HO(CH2)3CH2OH Al 2O3 heat Al 2O3 heat J NaBH4 HO(CH2)2CH(OH)CH3 State the role of NaBH4 in the reactions with G and J. Identify the organic product K. P and Q have the same molecular formula as G. HO O P OH O Q Complete the table with the expected observations for the reactions of P and Q with the named reagents. reagent result with P result with Q Br22,4-dinitrophenylhydrazine aqueous sodium carbonate  The structure of compoundL is shown. R represents a hydrocarbon chain. O L O R A student was asked to deduce the full structure of L. The student analysed L using infrared spectroscopy. The following spectrum was obtained. transmittance % wavenumber / cm–1 Z X Y Identify the bonds responsible for the absorptions marked X and Z. X Z  AbsorptionY shows that L has a C=C bond present in the R group. The student decided to treat L with hot concentrated acidified potassiummanganate(. The products of the reaction are shown. O L O R O O O hot concentrated acidified KMnO4 OH + M CH3(CH2)4COOH Name M. Use the information in to deduce the molecular formula of L.  molecular formula of L = 
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THEORY
2020
Paper 2, Variant 2
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