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1.1 The particle model

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Question 24
F

A student heats a test tube of solid substance X in a water bath.

The student measures the temperature of X every minute.

The graph shows the results.

image

a.

What is the melting point of substance X?

[1]
b.

What state is substance X in at 8 minutes?

[1]
c.

The temperature of X stays the same between 3 and 6 minutes, even though the water bath is still heating it.

Explain why.

[2]
d.

Describe how the arrangement and the movement of the particles of X change between 0 minutes and 8 minutes.

[2]
e.

The student says, "Substance X is pure."

Give one piece of evidence from the results that supports this.

[1]
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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