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2.3 Properties of materials

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Question 4

A recycling plant separates two simple molecular organic liquids, P and Q, by heating them. The liquid with the lower boiling point is collected first.

LiquidCondensed structural formula
PCH3CH2CH2CH2CH3\mathrm{CH_3CH_2CH_2CH_2CH_3}CH3​CH2​CH2​CH2​CH3​
QCH3CH2CH2CH2CH2CH2CH2CH3\mathrm{CH_3CH_2CH_2CH_2CH_2CH_2CH_2CH_3}CH3​CH2​CH2​CH2​CH2​CH2​CH2​CH3​

A technician proposes collecting Q before P.

Evaluate the technician's proposed collection order using the molecular structures.

[3]
Markscheme

2.3 Properties of materials Questions

  1. GCSE
  2. /Chemistry
  3. /2.3 Properties of materials

122 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.

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