CBSE Class 10 Science Deleted Topics from Syllabus for Board Exam 2021

Check the CBSE Class 10 Science deleted syllabus here. Know the chapter-wise topics that have been removed from the syllabus for the academic session 2020-2021.

CBSE Class 10 Science Deleted Syllabus for 2020-2021
CBSE Class 10 Science Deleted Syllabus for 2020-2021

CBSE did some major reduction in the syllabus of all Class 10 Science subject. It's important for students to have a clear idea of what they need to prepare in the second half of the academic session 2020-2021. The board has clearly notified that the deleted portion of the syllabus should not be considered for internal assessments or for the year-end board exams. 

Check best study plan and tips to score above 90% marks in CBSE Class 10 Science Exam 2021

Here, we are providing the complete list of the CBSE Class 10 Science topics that have been deleted from the original syllabus that was released at the beginning of the current academic session. You will know the chapter-wise topics from questions that will not be asked in the board examination. This will definitely help you in ignoring such topics while studying the Science subject.

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CBSE Class 10 Science (086) - Deleted portion (Theory):

Unit I: Chemical Substances - Nature and Behaviour



Metals and 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.

Unit II: World of Living



Control and co-ordination in animals and plants

(Whole Chapter Removed)

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

Unit III: Natural Phenomena



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

Unit IV: Effects of Current



Magnetic Effects of Current :

Electric Generator, Direct current.

Alternating current: frequency of AC, Advantage of AC over DC.

Domestic electric circuits

Unit V: Natural Resources



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

(This chapter is to be prepared only for Internal Assessment. It will not be assessed in the Annual Board Examination)

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.

Important* CBSE Class 10 Science Paper Pattern & Sample Paper for Board Exam 2021

Also check:

Deleted Practicals:

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

2. Determination of the equivalent resistance of two resistors when connected in series and parallel.

3. Preparing a temporary mount of a leaf peel to show stomata.

4. Study of the following properties of acetic acid (ethanoic acid):

i) Odour

ii) solubility in water

iii) effect on litmus

iv) reaction with Sodium Hydrogen Carbonate

5. Study of the comparative cleaning capacity of a sample of soap in soft and hard water.

6. 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.

7. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean).

You can also check below the revised CBSE Syllabus for Class 10 Science subject on the basis of which the internal assessment and the year-end board examination will be conducted:

Download CBSE Class 10 Science Revised Syllabus for 2020-2021

Also Check: CBSE Class 10 Science Complete Study Material & Preparation Guide for Board Exam 2021

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