There are different subjects in the CBSE Class 9 syllabus, each with its own set of chapters. Here is a detailed breakdown of the number of chapters in each subject:

1. Mathematics:
- Number Systems: This chapter explores the concept of rational and irrational numbers and their representation on a number line.
- Polynomials: It covers topics like algebraic expressions, degree of polynomials, and operations on polynomials.
- Coordinate Geometry: This chapter introduces students to the Cartesian plane and the concepts of coordinates and distance between two points.
- Linear Equations in Two Variables: It focuses on solving linear equations with two variables and their graphical representation.
- Introduction to Euclid's Geometry: This chapter provides an introduction to geometry based on Euclid's postulates and axioms.
- Lines and Angles: It deals with various types of angles, pairs of lines, and their properties.
- Triangles: This chapter discusses the properties of triangles, congruence criteria, and inequalities in triangles.
- Quadrilaterals: It covers different types of quadrilaterals, their properties, and angle sum property.
- Areas of Parallelograms and Triangles: It explains the area of parallelograms and triangles using base and height.
- Circles: This chapter introduces the concept of circles, their properties, and related theorems.
- Constructions: It focuses on construction of different geometrical figures using a compass and ruler.
- Heron's Formula: This chapter explains the application of Heron's Formula to find the area of triangles.
- Surface Areas and Volumes: It deals with the calculation of surface areas and volumes of different 3D shapes.
- Statistics: This chapter covers the topics of data handling, presentation, and interpretation.
- Probability: It introduces students to the concept of probability through various examples.

2. Science:
- Matter in Our Surroundings: This chapter explores the properties of matter, states of matter, and changes in matter.
- Is Matter Around Us Pure: It focuses on the different types of mixtures and separation techniques.
- Atoms and Molecules: It introduces the concept of atoms, molecules, and their combination.
- Structure of the Atom: This chapter discusses the structure of an atom, atomic models, and subatomic particles.
- The Fundamental Unit of Life: It covers the cell as the basic unit of life and its structure.
- Tissues: This chapter explains the different types of tissues in plants and animals.
- Diversity in Living Organisms: It explores the classification of organisms based on their characteristics.
- Motion: This chapter covers the concepts of motion, speed, velocity, and acceleration.
- Force and Laws of Motion: It focuses on different types of forces and Newton's laws of motion.
- Gravitation: This chapter explains the concept of gravity, the universal law of gravitation, and its applications.
- Work and Energy: It discusses the concepts of work, energy, and different forms of energy.
- Sound: This chapter explores the properties and characteristics of sound.
- Why Do We Fall Ill: It covers topics related to health and diseases, their causes, and preventive measures.
- Natural Resources: It focuses on the conservation and management of natural resources.
- Improvement in Food Resources: This chapter discusses various methods of crop production, food preservation, and animal husbandry.

3. Social Science:
- Geography:
- India - Size and Location: This chapter provides an overview of India's size, location, and