CBSE Deleted Syllabus For Class 10 Science: Download PDF

CBSE Deleted Syllabus For Class 10 Science: Syllabus is one of the most important things if you need to score good marks in your board examinations. Being updated with the current syllabus and preparing the study flow according to the syllabus and time remaining is very important for the students. Science is a concept based subject so you need to work on all concepts in order to get good marks in this subject. If you are updated with the current syllabus it will help you to plan your study flow.

CBSE Class 10 Science Deleted Syllabus

As during the current Covid-19 situation, schools and students got a major hit in their education, the level of study and the mode of study. CBSE considered all this and decided to reduce the syllabus for each class by 30% accordingly. For this examination year, the reduced syllabus will be used for preparing board examinations this academic year. Here, you will see the standard weightage of marks for each unit and the deleted topics from each unit.

The table shown below shows the weightage of marks to each unit in CBSE Science 2020 subject according to CBSE:-

I Chemical substances- Nature and behaviour 26
II World of living 23
III Natural Phenomenon 12
IV Effects of Current 14
V Natural Resources 05
Total marks 80
Internal Assessment 20
Grand Total 100

Deleted Theory topics from the CBSE Science 2020 syllabus as given by CBSE:-


Metals & Non-metals: Basic metallurgical processes; Corrosion and its prevention


Carbon Compounds: Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes and alkynes), difference between saturated hydro carbons 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.



Control and coordination in animals and plants (Whole chapter deleted): Tropic movements in plants; Introduction of plant hormones; Control and co-ordination in animals: Nervous system; Voluntary, involuntary and reflex action; Chemical co-ordination: animal hormones


Heredity and evolution: Basic concepts of evolution


The Human Eye and the Colourful world: Functioning of a lens in human eye, defects of vision and their corrections, applications of spherical mirrors and lenses




Magnetic Effects of Current: Electric Generator, Direct current. Alternating current: frequency of AC, Advantage of AC over DC. Domestic electric circuits




Sources of Energy (Whole Chapter deleted): 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.


Management of Natural Resources (Only for internal assessment): Conservation and judicious use of natural resources. Forest and wild life; 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.


 Deleted Practical’s for Academic Year 2020-21

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

(i) Dilute Hydrochloric Acid

(ii) Dilute NaOH solution

(iii) Dilute Ethanoic Acid solution

(iv) Lemon juice

(v) Water

(vi) Dilute Hydrogen Carbonate solution

  1. Determination of the equivalent resistance of two resistors when connected in series and parallel.
  2. Preparing a temporary mount of a leaf peel to show stomata.
  3. Study of the following properties of acetic acid (ethanoic acid):
  4. i) Odour
  5. ii) solubility in water

iii) effect on litmus

  1. iv) reaction with Sodium Hydrogen Carbonate
  2. Study of the comparative cleaning capacity of a sample of soap in soft and hard water.
  3. Finding the image distance for varying object distances in case of a convex lens and drawing corresponding ray diagrams to show the nature of image formed.
  4. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean).



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