OCR A LEVEL CHEMISTRY EXAMINATION- 2026
ORGANIC SYNTHESIS
(Advanced Organic Chemistry – Reaction Pathways & Mechanisms)
Qualification: A Level Chemistry (OCR Specification A)
Paper Code: H432/02
Topic Area: Organic Synthesis & Functional Group Transformations
Date: __________________________
Time: __________________________
Duration: 2 Hours
Total Marks: 80
INSTRUCTIONS TO CANDIDATES
Answer ALL questions.
Show all reaction pathways clearly, including intermediates.
State reagents, conditions, and catalysts for each step.
Include curly-arrow mechanisms where required.
Use displayed or skeletal formulas appropriately.
Apply correct IUPAC nomenclature throughout.
Ensure all equations are balanced with correct state symbols.
,A Data Sheet is provided.
Use of a scientific calculator is permitted.
CANDIDATE DETAILS
Full Name: ____________________________________________
Candidate Number: _____________________________________
Centre Number: ________________________________________
Signature: ____________________________________________
FOR EXAMINER’S USE ONLY
Question Marks Available Marks Awarded
1
2
3
…
Total 80
Alkene to alkane
Electrophilic addition/hydrogenation
hydrogen
nickel catalyst
, Alkene to haloalkane
Electrophilic addition
HX or halogen
RTP
alkene undergoes what type of polymerisation
addition polymerisation
Alkene to alcohol
Electrophilic addition
conc (phosphoric) acid catalyst
steam
Haloalkane to nitrile
nucleophilic substitution
aqueous ethanolic NaCN or KCN
ORGANIC SYNTHESIS
(Advanced Organic Chemistry – Reaction Pathways & Mechanisms)
Qualification: A Level Chemistry (OCR Specification A)
Paper Code: H432/02
Topic Area: Organic Synthesis & Functional Group Transformations
Date: __________________________
Time: __________________________
Duration: 2 Hours
Total Marks: 80
INSTRUCTIONS TO CANDIDATES
Answer ALL questions.
Show all reaction pathways clearly, including intermediates.
State reagents, conditions, and catalysts for each step.
Include curly-arrow mechanisms where required.
Use displayed or skeletal formulas appropriately.
Apply correct IUPAC nomenclature throughout.
Ensure all equations are balanced with correct state symbols.
,A Data Sheet is provided.
Use of a scientific calculator is permitted.
CANDIDATE DETAILS
Full Name: ____________________________________________
Candidate Number: _____________________________________
Centre Number: ________________________________________
Signature: ____________________________________________
FOR EXAMINER’S USE ONLY
Question Marks Available Marks Awarded
1
2
3
…
Total 80
Alkene to alkane
Electrophilic addition/hydrogenation
hydrogen
nickel catalyst
, Alkene to haloalkane
Electrophilic addition
HX or halogen
RTP
alkene undergoes what type of polymerisation
addition polymerisation
Alkene to alcohol
Electrophilic addition
conc (phosphoric) acid catalyst
steam
Haloalkane to nitrile
nucleophilic substitution
aqueous ethanolic NaCN or KCN
