NCERT Solutions for Class 10 Science, Free, Updated for This Session

Chemical Reactions: In this chapter the main key concepts you will be reading are Chemical equation, balanced chemical equation, implications of a balanced chemical equation, and types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, neutralization, oxidation and reduction.

Acids, Bases and Salts: In this chapter the main key concepts you will be reading are Their definitions in terms of furnishing of H+ and OH– ions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.

Metals and Non-metals: In this chapter the main key concepts you will be reading are Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; Corrosion and its prevention.

Carbon Compounds: In this chapter the main key concepts you will be reading are Covalent bonding in carbon compounds. Versatile nature of carbon. Homologous series.

Periodic Classification of Elements: In this chapter the main key concepts you will be reading are Need for classification, early attempts at classification of elements (Dobereiner’s Triads, Newland’s Law of Octaves, Mendeleev’s Periodic Table), Modern periodic table, gradation in properties, valency, atomic number, metallic and non-metallic properties.

Life processes: In this chapter the main key concepts you will be reading are ‘Living Being’. The basic concept of nutrition, respiration, transport and excretion in plants and animals.

Reproduction: In this chapter the main key concepts you will be reading are Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning. Safe sex vs HIV/AIDS. Childbearing and women’s health.

Heredity and Evolution: In this chapter the main key concepts you will be reading are Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination: brief introduction;

Light – Reflection and Refraction: In this chapter the main key concepts you will be reading are Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification. Refraction; Laws of refraction, refractive index. Refraction of light by the spherical lens; Image formed by spherical lenses; Lens formula (Derivation not required); Magnification. Power of a lens. Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.

Effects of Current: In this chapter the main key concepts you will be reading are Electric current, potential difference and electric current. Ohm’s law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. Series combination of resistors, parallel combination of resistors and its applications in daily life. Heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I and R.

Magnetic Effects Of Current: In this chapter the main key concepts you will be reading are Magnetic field, field lines, field due to a current-carrying conductor, field due to current carrying coil or solenoid; Force on current-carrying conductor, Fleming’s Left Hand Rule, Electric Motor, Electromagnetic induction. Induced potential difference, Induced current. Fleming’s Right Hand Rule.

Our Environment: In this chapter the main key concepts you will be reading are Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.

Management of Natural Resources: In this chapter the main key concepts you will be reading are Conservation and judicious use of natural resources. Forest and wildlife; Coal and Petroleum conservation. Examples of people’s participation for conservation of natural resources. Big dams: advantages and limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.