OCR organic chemistry Study guides, Class notes & Summaries

OCR AS LEVEL CHEMISTRY A H432/03 UNIFIED CHEMISTRY ACTUAL 2024 EXAM GENUINE EXAM WITH ACCURATE ANSWERS. CHECK THE LAST PAGE FOR ACCURATE ANSWERS 1 This question is about organic chemistry. (a) This part is about two practical techniques used in organic preparations. (i) Complete the missing labels on the diagram and name the technique. Heat Name of technique: [2] (ii) Draw a labelled diagram to show apparatus set up for filtration under reduced pressure (vacuum filtration)...

OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS WITH COMPLETE SOLUTIONS alkene undergoes what type of polymerisation - CORRECT-addition  polymerisation Alkene to alcohol - CORRECT -Electrophilic addition  conc (phosphoric) acid catalyst  steam Haloalkane to nitrile - CORRECT -nucleophilic substitution ethanolic NaCN or KCN heat Haloalkane to primary amine (also makes NH4X) - CORRECT -Nucleophilic  substitution  Excess ethanolic NH3 with no further substitution HEAT under PRESSURE ac...

OCR A LEVEL ORGANIC CHEMISTRY YEAR 12 WITH VERIFIED QUESTIONS AND ANSWERS What is the melting and boiling points of alkanes like? - ANSWER--as chain length increases so does the strength of the intermolecular forces as there is greater surface area for contact between molecules and hence stronger london forces and therefore the melting/boiling points are highr for longer chain. What is a structura/chain isomer? - ANSWER--Same molecular formula but a different structural formula Wh...

OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS WITH COMPLETE SOLUTIONS alkene undergoes what type of polymerisation - CORRECT-addition  polymerisation Alkene to alcohol - CORRECT -Electrophilic addition  conc (phosphoric) acid catalyst  steam Haloalkane to nitrile - CORRECT -nucleophilic substitution ethanolic NaCN or KCN heat Haloalkane to primary amine (also makes NH4X) - CORRECT -Nucleophilic  substitution  Excess ethanolic NH3 with no further substitution HEAT under PRESSURE ac...

OCR A LEVEL CHEMISTRY A CHEMISTRY B SYNTHESIS OF AN ORGANIC LIQUID EXAM QUESTIONS AND CORRECT ANSWERKEY

OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 5: Synthesis of an organic liquid Practice Exam Questions and Mark Scheme

OCR A LEVEL ORGANIC CHEMISTRY YEAR 12 WITH VERIFIED QUESTIONS AND ANSWERS What is the melting and boiling points of alkanes like? - ANSWER--as chain length increases so does the strength of the intermolecular forces as there is greater surface area for contact between molecules and hence stronger london forces and therefore the melting/boiling points are highr for longer chain. What is a structura/chain isomer? - ANSWER--Same molecular formula but a different structural formula Wh...

OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS WITH COMPLETE SOLUTIONS alkene undergoes what type of polymerisation - CORRECT-addition  polymerisation Alkene to alcohol - CORRECT -Electrophilic addition  conc (phosphoric) acid catalyst  steam Haloalkane to nitrile - CORRECT -nucleophilic substitution ethanolic NaCN or KCN heat Haloalkane to primary amine (also makes NH4X) - CORRECT -Nucleophilic  substitution  Excess ethanolic NH3 with no further substitution HEAT under PRESSURE ac...

Alkene + hydrogen /nickel catalyst/423K= - correct answer alkane Alkene + bromine /room temperature= - correct answer dihaloalkane Alkene + HCl(g/aq) /room temperature= - correct answer haloalkane (mixed products) Alkene + H2O(g) /H3PO4= - correct answer alcohol (mixed products) Primary alcohol + 2[O] /excess K2Cr2O7/H2SO4/reflux= - correct answer carboxylic acid Primary alcohol + [O] /K2Cr2O7/H2SO4/distil= - correct answer aldehyde Secondary alcohol + [O] /K2Cr2O7/H2SO4/reflux...