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1.1 The particle model

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Question 7

The table gives the melting points and boiling points of four substances at ordinary laboratory pressure.

SubstanceMelting point (°C)Boiling point (°C)
P−6321
Q−759
R34210
S115445

A sample of one of these substances is kept at 25 ∘C25\,^\circ\mathrm{C}25∘C. In the sample, the particles are in contact with each other, are in no fixed pattern and can slide over one another. No chemical change takes place.

Which substance could the sample be?

[1]
A

Substance R

B

Substance Q

C

Substance P

D

Substance S

Markscheme

1.1 The particle model Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 The particle model

93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.

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