Chapter-1: Euclid's Algorithm and Real Numbers
Chapter-3: Pair of Linear Equations in Two variables
Chapter-4: Quadratic Equations
Chapter-5: Arithmetic Progressions
Chapter-6: Similarity of Triangles
Chapter-7: Similarity and the Theorem of Pythagoras
Chapter-8: Coordinate Geometry
Chapter-10: Heights and Distances
Chapter-13: Areas Related to a Circle
Chapter-1: An Introduction to Nanotechnology
Chapter-2: Reflection and Refraction
Chapter-3: Dispersion of light and natural Optical phenomena
Chapter-5: Magnetic Effects of Electric Current
Chapter-7: Acids, Bases and Salts
Chapter-10: Mineral Coal and Mineral Oil
Chapter-12: Nutrition and Respiration
Chapter-13: Transportation, Circulation and Excretion in Organisms
Chapter-14: Control and Coordination in Organisms
Chapter-15: Reproduction in Organisms
Chapter-16: Heredity and Evolution