The CBSE Class 10 deleted syllabus 2025-26 outlines topics and chapters removed from the Maths, Science, Social Science, English, and Hindi curriculum for the upcoming Board Exam 2026. These deletions, based on CBSE and NCERT updates, aim to reduce the academic burden and allow students to focus on essential topics.
Although no new deletions were introduced for 2025-26, previous syllabus reductions will continue to apply. Students referring to older NCERT or reference books must carefully skip these unprescribed sections to avoid studying unnecessary content.
Deleted Syllabus of Class 10 Maths
Skipping deleted chapters will allow students to devote more time to topics that are tested in Board Exam 2026.
Chapter | Deleted Topics |
Real Numbers | Euclid’s Division Lemma; Decimal representation of rational numbers (terminating/non-terminating recurring) |
Polynomials | Division algorithm and its applications |
Pair of Linear Equations | Graphical method; Cross-multiplication; Reducible forms |
Quadratic Equations | Completing the square method |
Triangles | Areas of similar triangles; Pythagoras theorem |
Coordinate Geometry | Area of a triangle |
Trigonometry | Trigonometric ratios of complementary angles |
Constructions | Entire chapter deleted |
Surface Areas & Volumes | Frustum of a cone; Solid conversions |
Statistics & Probability | Cumulative frequency graph; Optional probability exercise |
Deleted Syllabus of Class 10 Science
Only one full chapter is removed to simplify preparation:
Chapter | Deleted Topics |
Periodic Classification of Elements | Entire chapter removed |
Deleted Syllabus of Class 10 Social Science (SST)
Certain subtopics, mainly from Geography, are removed to make the syllabus more manageable:
Unit / Chapter | Deleted Topics |
Forest & Wildlife Resources | Biodiversity; Asiatic Cheetah; Himalayan Yew; Vanishing forests; Project Tiger |
Agriculture | Impact of globalisation on agriculture |
Manufacturing Industries | Cotton, jute, sugar, iron & steel, and cement industries |
Deleted Syllabus of Class 10 English
Grammar, prose, poetry, and supplementary reader sections have selective deletions:
Section | Deleted Topics / Chapters |
Grammar | Use of passive voice; Clauses – noun, adverb, relative; Prepositions |
First Flight – Prose | The Hundred Dresses – I; The Hundred Dresses – II |
First Flight – Poetry | Animals |
Footprints without Feet | The Hack Driver |
Deleted Syllabus of Class 10 Hindi
Several poems, prose, and supplementary texts are removed to reduce academic load:
Section | Deleted Topics / Chapters |
काव्य खंड (Poetry Section) | देव; सवैय्या; कविता; छाया मत छूना; कन्यादान |
गद्य खंड (Prose Section) | स्त्री शिक्षा के विरोधी कुतर्कों का खंडन; मानवीय करुणा की दिव्य चमक |
कृतिका भाग-2 (Supplementary) | हीठया; झुलिया हिरानी ओरामा; जॉर्ज पंचम की नाक |
Students must refer to this subject-wise deleted syllabus to focus on essential topics and avoid unnecessary preparation. This will help in effective revision and a stronger performance in CBSE Class 10 Board Exam 2026.
