Question 1
FA 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.
a.[1]
What is the melting point of substance X?
b.[1]
What state is substance X in at 8 minutes?
c.[2]
The temperature of X stays the same between 3 and 6 minutes, even though the water bath is still heating it.
Explain why.
d.[2]
Describe how the arrangement and the movement of the particles of X change between 0 minutes and 8 minutes.
e.[1]
The student says, "Substance X is pure."
Give one piece of evidence from the results that supports this.
1.1 The particle model Questions
48 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.