CBSE Class 10 Science Syllabus for 2021-22

On July 22, 2021, CBSE finalised the reduction in syllabus for the 2021-22 session as per the latest Term-based Examination Pattern.

CBSE Class 10 Syllabus has undergone drastic changes since the previous 2020-21 session. Due to the COVID-19 pandemic, the education system has been challenging for both teachers and students.

So, similar to the 30% reduction in the last session, CBSE decided to reduce the overall syllabus according to the Term-based Board Examination for the 2021-22 session again.

We, at Educart, were prompt about it and have updated the changes in all the subjects for you. Here, you can find:

  • freely-downloadable PDF links to the latest reduced Class 10 Science Syllabus for 2021-22 academic session; and
  • simple analysis of all the deleted topics/ chapters for 2021-22 Term-based Board Exam.

With all this information in hand, both teachers and students will have a defined structure to begin the learning process on time and efficiently.

Class 10 Science Reduced Syllabus for 2021-22 (Reduced)

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We have also provided the syllabus for the 2021-22 session that was previously restored so that you can compare the deleted and added topics.

Class 10 Science Syllabus for 2021-22 (Restored Previously)

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Now, let us take a look at the syllabus in detail and try to comprehend what changes have been made.

<red> Marked in red: <red> Topics <red> removed <red> for 2021-22

Units Units and Chapters Marks
Term I
I Chemical Substances - Nature and Behaviour: Chapter 1, 2 and 3 16
II World of Living: Chapter 6 10
III Natural Phenomena: Chapter 10 and 11 14
(Periodic Tests (03) + Multiple Assessments (02) +
Portfolio (02) + Student Enrichment Activities/
Practical Work (03))
Term II
I Chemical Substances-Nature and Behaviour: Chapter 4 and 5 10
II World of Living: Chapter 8 and 9 13
IV Effects of Current: Chapter 12 and 13 12
V Natural Resources: Chapter 15 05
(Periodic Tests (03) + Multiple Assessments (02) +
Portfolio (02) + Student Enrichment Activities/
Practical Work (03))


Unit I: Chemical Substances - Nature and Behaviour

1. Chemical Reactions and Equations

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.

2. 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.

3. Metals and Non-metals

Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; <red> Basic metallurgical processes; Corrosion and its prevention. <red>

Unit II: World of Living

6. Life Processes

‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.

Unit III: Natural Phenomena

10. Light – Reflection and Refraction

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 spherical lens; Image formed by spherical lenses; Lens formula (Derivation not required); Magnification. Power of a lens.

11. Human Eye and Colourful World

<red> Functioning of a lens in the human eye, defects of vision and their corrections, applications of spherical mirrors and lenses. <red> Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.


Unit I: Chemical Substances - Nature and Behaviour

4. Carbon and its Compounds

Covalent bonding in carbon compounds. Versatile nature of carbon. Homologous series. <red> 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. <red>

5. Periodic Classification of Elements

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.

Unit II: World of Living

<red> 7. Control and Coordination in Animals and Plants <red>

<red> Tropic movements in plants; Introduction of plant hormones; Control and coordination in animals: Nervous system; Voluntary, involuntary and reflex action; Chemical coordination: animal hormones. <red>

8. Reproduction

Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning. Safe sex vs HIV/AIDS. Child bearing and women’s health.

9. Heredity and Evolution

Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination: brief introduction; <red> Basic concepts of evolution. <red>

Unit IV: Effects of Current

12. Electricity

<red> Electric current, potential difference and electric current. <red> 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.

13. Magnetic Effects of Electric 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, Electric Motor, Electromagnetic induction. Induced potential difference, Induced current. Fleming’s Right Hand Rule, <red> Electric Generator, Direct current. Alternating current: frequency of AC. Advantage of AC over DC. Domestic electric circuits. <red>

Unit V: Natural Resources

<red> 14. Sources of Energy <red>

<red> 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 of Energy. <red>

15. Our Environment

Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.

<red> 16. Management of Natural Resources <red>

<red> 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 <red>.

<red> NOTE: <red> <red> This chapter will be used for Internal Assessment. <red>


Practical should be conducted alongside the concepts taught in theory classes.

Term I


1. A. (Unit I) Finding the pH of the following samples by using pH paper/universal indicator:

  • Dilute Hydrochloric Acid
  • Dilute NaOH solution
  • Dilute Ethanoic Acid solution
  • Lemon juice
  • Water
  • Dilute Hydrogen Carbonate solution

<green> (This practical was removed for the previous session i.e. 2020-21 but now it is added back for the 2021-22 session.) <green>

B. (Unit I Chapter 2) Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with:

  • Litmus solution (Blue/Red)
  • Zinc metal
  • Solid sodium carbonate

2. (Unit I Chapter 1) Performing and observing the following reactions and classifying them into:

1. Combination reaction

2. Decomposition reaction

3. Displacement reaction

4. Double displacement reaction

  • Action of water on quicklime
  • Action of heat on ferrous sulphate crystals
  • Iron nails kept in copper sulphate solution
  • Reaction between sodium sulphate and barium chloride solutions

3. A. (Unit I) Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions:

  • ZnSO4(aq)
  • FeSO4(aq)
  • CuSO4(aq)
  • Al2 (SO4)3(aq)

B. (Unit I Chapter 3) Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result.

<red> 4. (Unit IV) <red> <red> Determination of the equivalent resistance of two resistors when connected in series and parallel. <red>

<red> 5. (Unit II) <red> <red> Preparing a temporary mount of a leaf peel to show stomata. <red>

6. (Unit II  Chapter 6) Experimentally show that carbon dioxide is given out during respiration.

<red> 7. (Unit I) <red> <red> Study of the following properties of acetic acid (ethanoic acid): <red>

  • <red> Odour <red>
  • <red> Solubility in water <red>
  • <red> Effect on litmus <red>
  • <red> Reaction with Sodium Hydrogen Carbonate <red>

<red> 8. (Unit I) <red> <red> Study of the comparative cleaning capacity of a sample of soap in soft and hard water. <red>

9. (Unit III Chapter 10) Determination of the focal length of:

  • Concave mirror
  • Convex lens
    by obtaining the image of a distant object.

10. (Unit III Chapter 10) Tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result.

11. (Unit III Chapter 11) Tracing the path of the rays of light through a glass prism.

<red> 12. (Unit III) <red> <red> Finding the image distance for varying object distances in case of a convex lens and drawing corresponding ray diagrams to show the nature of the image formed. <red>

<red> 13. (Unit II) <red> <red> Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean). <red>

Term II


1. (Unit IV Chapter 12) Studying the dependence of potential difference (V) across a resistor on the current (I) passing through it and determining its resistance. Also plotting a graph between V and I.

2. (Unit II Chapter 8) Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides.

CBSE has also provided an insight into how the Internal Assessment will depend on Competencies.

Competencies Marks
Demonstrate Knowledge and Understanding 46%
Application of Knowledge/ Concepts 22%
Analyze, Evaluate and Create 32%

Our other latest CLASS 10 EDUCART QUESTION BANKS FOR 2022 EXAMS are a complete solution for exam preparation with new pattern chapter-wise questions, Toppers corner, Competency-based Q’s, Self Assessment Questions and Papers, and Topper Answers.

Any other information regarding CBSE curriculum, paper pattern, study material, and notifications is available below in the supporting links.