Gas laws — KCSE Physics
KCSE Physics · 111 practice questions · 6 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
State the basic assumptions of the kinetic theory of gases and explain gas laws using the kinetic model
Solve numerical problems involving gas laws
State and verify experimentally Boyle's law, Charles' law and pressure law
Explain how absolute zero temperature may be obtained and convert between Celsius and Kelvin scales
Apply the combined gas law P₁V₁/T₁ = P₂V₂/T₂ to solve problems involving simultaneous changes in P, V and T
State applications of gas laws and explain real-world phenomena using gas behaviour
Sample Questions
Try 3 questions free. Sign up to access all 111 questions with full marking schemes.
Identify how the behaviour of gas in a sealed container changes with temperature increase. (3 marks)
View Marking Scheme
Identify two everyday applications of the ideal gas law. (2 marks)
View Marking Scheme
A sample of helium gas is contained in a sealed cylinder at a pressure of 200 kPa and a temperature of 350 K. If the pressure is reduced to 100 kPa while the temperature is decreased to 250 K, determine the initial volume of the gas if it is known that the final volume is 1.5 m³. (4 marks)
View Marking Scheme
A gas occupies a volume of 2.0 m³ at a pressure of 100 kPa and a temperature of 300 K. If the volume is increased to 4.0 m³ while the temperature rises to 600 K, calculate the final pressure of the gas. (3 marks)
Why Practise Gas laws?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
Detailed Marking Schemes
Every answer shows exactly what examiners award marks for.
Track Your Mastery
See your score improve as you practise and identify remaining gaps.