Deleted 10th Science (Theory)

Under Unit I: Chemical Substances – Nature and Behavior

• Metals and Non-metals: Basic Metallurgical processes; Corrosion and its prevention
• Carbon and its Compounds: Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes, and alkynes), the 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.

Under Unit II: World of Living

• Control and coordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and coordination in animals: Nervous system; Voluntary, involuntary, and reflex action; Chemical co-ordination: animal hormones.
• Heredity and Evolution: The Basic Concepts of Evolution.

Under Unit III: Natural Phenomena

• The Human Eye and the Colorful World: Functioning of a lens in the human eye, defects of vision and their corrections, applications of spherical mirrors and lenses.

Under Unit IV: Effects of Current

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

Under 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 of Energy.

Updated: Deleted 10th Science Practicals

1. 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

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):

• Odor
• Solubility in water
• Effect on litmus
• 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 the case of a convex lens and drawing corresponding ray diagrams to show the nature of the image formed.

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

Chapter

Topics removed

UNIT I-NUMBER SYSTEMS

REAL NUMBERS

Euclid’s division lemma

UNIT II-ALGEBRA

POLYNOMIALS

Statement and simple problems on division algorithm

for polynomials with real coefficients.

PAIR OF LINEAR EQUATIONS

IN TWO VARIABLES

cross multiplication method

QUADRATIC EQUATIONS

Situational problems based on equations reducible to a quadratic equation

ARITHMETIC PROGRESSIONS

Application in solving daily life problems based on a sum to n terms

UNIT III-COORDINATE GEOMETRY

COORDINATE GEOMETRY

Area of a triangle.

UNIT IV-GEOMETRY

TRIANGLES

Proof of the following theorems is deleted

• The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides.
• In a triangle, if the square on one side is equal to the sum of the squares on the other two sides, the angle
• opposite to the first side is a right angle.

CIRCLES

No deletion

CONSTRUCTIONS

Construction of a triangle similar to a given triangle.

UNIT V- TRIGONOMETRY

INTRODUCTION TO TRIGONOMETRY

motivate the ratios whichever are defined at 0o and 90o

TRIGONOMETRIC IDENTITIES

Trigonometric ratios of complementary angles

HEIGHTS AND DISTANCES

No deletion

UNIT VI-MENSURATION

AREAS RELATED TO CIRCLES

Problems with the central angle of 120°

SURFACE AREAS AND VOLUMES

Frustum of a cone.

UNIT VI-STATISTICS & PROBABILITY

STATISTICS

Step Deviation Method for finding the mean

Cumulative Frequency graph

PROBABILITY

No deletion

NOTE- ANYONE OUT OF THESE TWO CHAPTERS (CH-3/CH4)

Chapter 3: The Making of a Global World Chapter 4: The Age of Industrialisation

Chapter 5: Print Culture and the Modern World

Deleted Portion of English Class 10

• Use of Passive Voice
• Clauses: Noun, Adverb Clauses of condition and time, Relative Prepositions

Deleted CBSE 10th Class English First Flight Syllabus

First Flight Literature

• How to Tell Wild Animals
• Trees
• Fog
• Mijbil the Otter
• For Anne Gregory

Deleted CBSE 10th Class English Footprints Without Feet Syllabus

• The Midnight Visitor
• A Question of Trust
• The Book That Saved The Earth