CBSE Class 10 Science Exam 2026 LIVE: Expected Questions; Probable Topics, Weightage & Expert Tips
Get the final blueprint for CBSE Class 10 Science Exam 2026 scheduled on February 25. Access unit-wise weightage, high-yield NCERT topics, and expert tips to master all 39 questions and score 80/80.
CBSE Class 10 Science Exam 2026:As CBSE Class 10 Science 2026 exam approaches, you must be gearing up with the one of the most critical papers. The exam is scheduled forFebruary 25, 2026. The theory paper comprises 39 compulsory questions divided into three subject sections: Section A (Biology), Section B (Chemistry), and Section C (Physics). Section A comprises 16 questions of 30 marks. Section B includes 13 questions, each worth 25 marks. Section C comprises 10 questions, each worth 25 marks. As per the latest pattern, 50% of the paper will be comprised of competency-based questions.
CBSE Class 10 Science Exam 2026 Unit-Wise Weightage & High-Yield Topics
Collegedekho experts suggest focusing on these five key units featuring high-weightage areas:
- Chemical Substances (25 Marks):Carbon compounds, Reactivity Series, and balancing chemical equations are yearly favorites.
- World of Living (25 Marks):This is the most scoring section. Focus on diagrams of the human heart, nephron, and the process of double circulation.
- Natural Phenomena (12 Marks):Master the ray diagrams for spherical mirrors and lenses.
- Effects of Current (13 Marks):Be ready for numericals on Ohm’s Law and Series/Parallel circuits.
- Natural Resources (5 Marks):Focus on the 10% law in food chains and ozone depletion.
Expert Tips for CBSE Class 10 Science Exam Day 2026
- The 15-Minute Rule:Use initial reading time to bifurcate the sections into 'Easy', 'Moderate', and 'Tricky'. To build momentum, start with the easy questions.
- Diagram Precision:All biological and physics diagrams must be neatly drawn with a sharp pencil with clear labels on one side of the diagram, where possible.
- NCERT Dominance:Experts maintain that 90% of the paper stays strictly within the NCERT textbook. Don't ignore the "Blue box" in-text questions.
- Keyword Strategy:In Biology, use technical terms like homozygous, heterozygous, and transpiration to secure full marks.
Stay tuned to this LIVE blog for real-time updates on CBSE Class 10 Science 2026 examination, probable topics, expert tips, and answer keys immediately after the exam!
CBSE Class 10 Science Exam 2026 LIVE
Feb 24, 2026 06:00 AM IST
Electricity: Series vs. Parallel Resistance
Master the math to master the marks.
- Series (Rs = R1 + R2 + ...): Current remains the same throughout; voltage is divided.
- Parallel (1/Rp = 1/R1 + 1/R2 + ...): Voltage remains constant across all resistors; current is divided.
Pro-Tip: In parallel, the total resistance is always less than the smallest individual resistor.
Feb 24, 2026 05:45 AM IST
Life Processes: The Pathway of Air
Respiration isn't just breathing; it's an engineering marvel.
- The Path: Nostrils → Pharynx →Larynx → Trachea → Bronchi → Bronchioles → Alveoli.
- The Alveoli: These are thin-walled, balloon-like structures surrounded by a vast network of capillaries.
- Efficiency: Their structure maximizes the surface area for gas exchange. If spread out, human alveoli would cover roughly 80 square meters!
Feb 24, 2026 05:30 AM IST
Carbon Compounds: Functional Groups Recap
Functional groups are the "personality" of a carbon molecule. You must be able to identify the suffix and the structural formula for the big four:
Functional Group Formula Suffix Example Alcohol -OH -ol Ethanol (CH_3CH_2OH) Aldehyde -CHO -al Ethanal (CH_3CHO) Ketone >C=O -one Propanone (CH_3COCH_3) Carboxylic Acid -COOH -oic acid Ethanoic acid (CH_3COOH) Feb 24, 2026 05:15 AM IST
Light: Focus On Ray Diagrams For Concave Mirrors
This is the "special case" for concave mirrors. While most positions produce real and inverted images, placing an object between the Pole (P) and the Principal Focus (F) results in a unique outcome.
- Ray Diagram Logic: 1. One ray travels parallel to the principal axis and passes through F after reflection. 2. Another ray passes through the Center of Curvature (C) and reflects back on itself. 3. Since these rays diverge in front of the mirror, they must be extended backward to meet.
- Image Characteristics: Virtual, erect, and highly magnified.
- Real-world Application: This is why concave mirrors are used as shaving mirrors or by dentists to see larger images of teeth.
Feb 24, 2026 05:00 AM IST
The "Blue Box" Checklist: Ncert’s Hidden Gems
Experts warn that "Blue Box" in-text questions are often converted into 3-mark application questions. Quickly flip through your NCERT for these boxes, especially in the Electricity and Life Processes chapters.
Feb 24, 2026 04:45 AM IST
Competency-Based Questions: Analyze The 50% Weightage Shift
As per the 2026 pattern, half the paper is application-based. Review case studies involving Ohm’s Law in household circuits and Genetics (Mendel’s dihybrid cross). Don't just memorize definitions; understand the "why" behind the process.
Feb 24, 2026 04:30 AM IST
Physics Numerical Alert: Master Mirror & Lens Formulae
Double-check your Sign Conventions for spherical mirrors and lenses. Remember, a negative focal length always indicates a concave lens/mirror.
Feb 24, 2026 04:15 AM IST
Chemistry Formula Marathon: Focus On Carbon & Its Compounds
Unit I (Chemical Substances) carries 25 marks. Ensure you have memorized the functional groups and the difference between Saturated and Unsaturated Hydrocarbons. Practice balancing at least 10 complex equations from the NCERT exemplar.
Feb 24, 2026 04:00 AM IST
The Early Bird Strategy: Prioritize High-Weightage Biology Diagrams
Start your morning by mastering the "scoring" diagrams. For the 2026 paper, examiners expect precision in labeling. Focus specifically on the Human Alimentary Canal, the Respiratory System, and the Structure of a Nephron.