GCSE Chemistry: States of Matter Practice Questions
Question 1
Q1. Knowledge Recall (1 mark)
Define a gas.
Question 2
Q2. Application (2 marks)
Explain why water evaporates more quickly on a windy day than a still day.
Question 3
Q3. Calculation (3 marks)
Calculate the volume of 0.5 moles of nitrogen gas at room temperature (25 °C) and pressure (1.0 atm). [R = 0.0821 Latm/(molK)]
Question 4
Q4. Knowledge Recall (2 marks)
Distinguish between physical and chemical changes with examples.
Question 5
Q5. Application (2 marks)
Explain how the boiling point of a liquid is affected by intermolecular forces.
Question 6
Q6. Knowledge Recall (1 mark)
Name the three states of matter.
Question 7
Q7. Application (3 marks)
Describe the changes in energy and volume that occur when a solid sublimes.
Question 8
Q8. Data Analysis (3 marks)
A student collected the following data on the melting points of different substances:
- Substance A: 10 °C
- Substance B: 50 °C
- Substance C: -20 °C
- Which substance has the weakest intermolecular forces?
Question 9
Q9. Knowledge Recall (2 marks)
Define a liquid crystal.
Question 10
Q10. Chemical Equation (4 marks)
Write a chemical equation for the reaction between solid magnesium and aqueous hydrochloric acid. Include state symbols.