class 10 OLD VS NEW syllabus 2020-2021
CBSE BIG CHANGES IN SYLLABUS
yellow color not in syllabus
yellow color not in syllabus
Unit
I: Chemical Substances - Nature and Behaviour
Chemical reactions: Chemical equation, Balanced chemical equation,
implications of a balanced chemical equation, types of chemical reactions:
combination, decomposition, displacement, double displacement,
precipitation, neutralization, oxidation and reduction.
Acids, bases and salts: 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: Properties of metals
and non-metals, reactivity series, formation and properties of
ionic compounds, not
in syllabus metallurgical processes,
corrosion and its prevention.
Carbon compounds: Covalent bonding in
carbon compounds. Versatile nature of carbon. Homologous series not in syllabus Nomenclature of carbon compounds
containing functional groups (halogens, alcohol, ketones, aldehydes,
alkanes and alkynes), difference between saturated hydrocarbons and
unsaturated hydrocarbons. Chemical properties of carbon compounds
(combustion, oxidation, addition and substitution reaction). Ethanol and
Ethanoic acid (only properties and uses), soaps and detergents.
Periodic classification of elements: Need for
classification, Modern periodic table, gradation in properties, valency,
atomic number, metallic and non-metallic properties.
Unit
II: World of Living
Life processes: "living being". Basic concept of nutrition,
respiration, transport and excretion in plants and animals.
Control
and co-ordination in animals and plants: Tropic movements in plants;
Introduction to plant hormones; control and co-ordination in animals :
nervous system; voluntary, involuntary and reflex action, chemical
co-ordination: animal hormones.
Reproduction: Reproduction in animal and plants (asexual and sexual)
reproductive health-need for and methods of family planning. safe sex vs
HIV/AIDS. Child bearing and women's health.
Heredity and evolution: Heredity; Mendel's contribution- Laws for inheritance of
traits: Sex determination: brief introduction; Basic concepts of
evolution.
Unit
III: Natural Phenomenon
Reflection of light at
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
spherical lens, Image formed by spherical lenses, Lens formula (Derivation not
required), Magnification. Power of a lens.
Functioning of a lens
in human eye, defects of vision and their corrections, applications of
spherical mirrors and lenses.
Refraction of light
through a prism, dispersion of light, scattering of light, applications in
daily life.
Unit
IV: Effects of Current
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, Inter relation between P, V, I and R.
Magnetic effects of current: 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. Electromagnetic induction. Induced potential difference,
Induced current. Fleming's Right Hand Rule, Direct current.
Alternating current : frequency of AC. Advantage of AC over DC. Domestic
electric circuits.
Unit
V: Natural Resources
Sources
of energy: Different forms of energy, conventional and
non-conventional sources of energy: fossil fuels, solar energy; biogas;
wind, water and tidal energy; nuclear energy. Renewable versus non-renewable
sources.
Our environment: Eco-system, Environmental problems, Ozone depletion, waste
production and their solutions. Biodegradable and non-biodegradable
substances.
NOT IN SYLLABUS Management of natural
resources: Conservation and judicious use of
natural resources. Forest and wild life; Coal and Petroleum conservation.
Examples of people’s participation for conservation of snatural resources. Big
dams: advantages and limitations; alternatives, if any. Water harvesting.
Sustainability of natural resources.
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