Gaseous state of matter – A/L Chemistry Complete Masterclass (Sinhala Medium)

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About Course

✔ Lifetime access ✔ 10+ hours of video lessons ✔ Full A/L syllabus coverage
✔ Theory + Practice Problems + Answering guide ✔ Sinhala medium

This masterclass provides a complete step-by-step explanation of the Gaseous State of Matter for A/L Chemistry in the Sinhala medium.

The Gaseous State of Matter is an important physical chemistry lesson in the A/L Chemistry syllabus. Many students struggle with gas laws, molecular speeds, kinetic theory, and numerical problems.

This masterclass is designed to help students clearly understand the theory, confidently solve problems, and answer exam questions correctly.

Each concept is explained step-by-step with exam-focused examples and discussions.

In this masterclass, you will learn:

✔ Properties of gases
✔ Boyle’s law and Charles’s law
✔ Ideal gas equation and gas constant
✔ Partial pressure and Dalton’s law
✔ Kinetic molecular theory of gases
✔ Root mean square velocity and molecular speeds
✔ Maxwell–Boltzmann distribution of molecular speeds
✔ Real gases and deviations from ideal behaviour
✔ Numerical problem-solving techniques
✔ Structured and essay question discussions

This course is ideal for:

• A/L 2026 students
• A/L 2027 students
• Students repeating the A/L exam
• Students who find Gaseous State of matter difficult
• Students aiming for A or B grades

Resources included

✔ Complete video lesson series
✔ Numerical problem-solving sessions
✔ Practice questions and discussions
✔ Lifetime access to materials
✔ Printed notebook provided for the course


Course duration

10+ hours of video lessons


Why this course is important

Most A/L students try to memorize formulas in the Gaseous State of Matter lesson without really understanding the core concepts.

This leads to:

• Confusion when applying gas laws
• Difficulty solving numerical problems involving the ideal gas equation
• Misunderstanding molecular speed concepts and kinetic theory
• Difficulty interpreting Maxwell–Boltzmann distribution curves
• Losing marks in structured and essay questions

In this masterclass, every concept is explained from basic to advanced level, so you can confidently solve problems and answer any Gaseous State of Matter question in the A/L Chemistry examination.


If you attended a physical tuition class covering the full Gaseous State of Matter lesson, it would cost more than Rs 10,000.

Get lifetime access for a one-time payment and revise anytime before the exam.

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What Will You Learn?

  • Understand the fundamental properties of gases
  • Apply gas laws such as Boyle’s law and Charles’s law
  • Use the ideal gas equation to solve numerical problems
  • Understand kinetic molecular theory of gases
  • Interpret Maxwell–Boltzmann distribution curves
  • Solve A/L Chemistry gas law numerical problems confidently

Course Content

Day – 01

  • 01. States of matter and characteristics of states of matter
  • 02. Structure of matter
  • 03. Explaining the characteristics of states of matter
  • 04. Confirming the structure of matter
  • 05. Pressure created by a gas
  • 06. Introduction to Gases
  • 07. Boyle’s Law
  • 08. Charles’ Law
  • 09. Combined Gas Law
  • Assignment 01 – Answers

Day – 02

Day – 03

Day – 04

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