1.1 The particle model

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Question 12

A technician places separate samples of four pure substances in a temperature-controlled chamber. The measurements are made at atmospheric pressure.

Substance	Melting point ( $∘C^\circ\mathrm{C}$ )	Boiling point ( $∘C^\circ\mathrm{C}$ )
A	-20	35
B	10	85
C	45	120
D	-65	-5

The available chamber settings are $∘C-15\,^\circ\mathrm{C}$ , $∘C5\,^\circ\mathrm{C}$ , $∘C20\,^\circ\mathrm{C}$ and $∘C50\,^\circ\mathrm{C}$ .

The required conditions are: A and B are liquids, C is a solid and D is a gas. Which setting should the technician select?

[1]

$∘C20\,^\circ\mathrm{C}$

$∘C50\,^\circ\mathrm{C}$

$∘C5\,^\circ\mathrm{C}$

$∘C-15\,^\circ\mathrm{C}$

Markscheme

1.1 The particle model Questions

GCSE
Chemistry
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.

Question bank·1.1 The particle model