Explain4 marksStandard
Propene can be converted to propane by hydrogenation.
Explain how this reaction is carried out, including the reagents and conditions used, and explain the role of the catalyst in the process.
CAIE A Level Chemistry 9701 · Hydrocarbons
Hydrocarbons: explain question
How this question is marked
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
More Hydrocarbons questions
- 4 marks · Ethane reacts with chlorine in the presence of ultraviolet light to form chloroethane. Explain the mechanism of this reaction, referring…
- 5 marks · Describe how methylbenzene is converted into benzoic acid, including the reagents and conditions required, and the role of the side-chain…
- 5 marks · Propene, CH3CH=CH2, undergoes addition polymerisation to form poly(propene). Compare the structure of the propene monomer with the…
- 4 marks · Methylbenzene reacts with ethanoyl chloride, CH3COCl, in the presence of anhydrous aluminium chloride, AlCl3, and heat. Explain why this…
- 5 marks · Benzene reacts with bromine to form bromobenzene. Describe the reagents and conditions needed for this reaction, and explain why the…
- 4 marks · An alkene with molecular formula C5H10 is treated with hot concentrated acidified potassium manganate(VII) (KMnO4). The only organic…
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.