CBSE Class 10 Science Exam 2026 24-Hour Revision Plan: What to Revise First and What to Skip

CBSE Class 10 Science Exam 2026 24-Hour Revision Plan: The CBSE Class 10 Science Exam 2026, conducted by the Central Board of Secondary Education, is scheduled for 25 February 2026. This board exam is a major academic milestone for Class 10 students and plays an important role in shaping future academic choices. If you have only 24 hours left before the Science exam, the focus should be on smart and strategic revision rather than panic studying. 

You should have a clear plan focus on revising high-weightage chapters, important formulas, diagrams, and key NCERT concepts effectively. This practical 24-hour revision guide will help you understand what to revise first, which topics to prioritize, and what to skip before the exam day.

CBSE Class 10 Science Exam 2026 Overview

The exam is conducted by the Central Board of Secondary Education (CBSE). The Science paper includes questions from Physics, Chemistry, and Biology and is largely based on the NCERT textbook.

The paper generally includes:

• Multiple-choice questions (MCQs)

• Short answer questions (2–3 marks)

• Long answer questions (4–5 marks)

• Internal choices

Since CBSE strictly follows NCERT, your final revision must focus mainly on:

• NCERT definitions

• Important diagrams

• Key formulas

• Chemical equations

• Previous year board questions

24-Hour Revision Plan for CBSE Class 10 Science 2026

Divide your 24 hours into four structured blocks. This will help you stay organized and avoid last-minute confusion.

First 6 Hours: Revise High-Weightage Biology Chapters

Biology is scoring if you revise diagrams and key concepts properly.

Priority Chapters:

1. Life Processes

2. Control and Coordination

3. How do Organisms Reproduce

4. The Human Eye and the Colourful World

What to Focus On:

• Diagrams of the heart, brain, eye, and reflex arc

• Important definitions

• Differences between terms

• Functions and processes

Biology answers are step-marked, so write clear points and use proper keywords.

Next 6 Hours: Focus on Physics Numericals and Concepts

Physics requires clarity of formulas and correct steps.

Important Chapters:

1. Electricity

2. Magnetic Effects of Electric Current

3. Light – Reflection and Refraction

4. Human Eye and Defects of Vision
   
   

What to Revise:

• Ohm’s Law and resistance formulas

• Ray diagrams for mirrors and lenses

• Fleming’s left-hand and right-hand rules

• Mirror and lens formula numericals

Solve 8–10 important numerical questions from the NCERT and previous year papers. Do not attempt very difficult or new types of problems at this stage.

Next 6 Hours: Revise Chemistry Important Topics

Chemistry can be scoring if you remember equations and reactions correctly.

High-Scoring Chapters:

1. Chemical Reactions and Equations

2. Acids, Bases and Salts

3. Carbon and Its Compounds

4. Periodic Classification of Elements
   
   

What to Focus On:

• Types of chemical reactions

• Balancing equations

• pH scale and important reactions

• Functional groups in carbon compounds

• Trends in the periodic table

Revise only important reactions from NCERT. Do not try to memorize extra reference book content.

Final 6 Hours: Quick Revision and Practice

Use the last few hours wisely.

Revise:

• Complete formula list

• Important diagrams

• Definitions

• Chemical equations

• 1–2 sample papers

Read through NCERT summaries and highlighted points. Avoid overloading your brain.

Make sure to sleep at least 6–7 hours before the exam for better concentration.

What to Revise First in the Last 24 Hours

If time is limited, follow this priority order:

1. Electricity numericals

2. Light ray diagrams

3. Life Processes diagrams

4. Carbon and its Compounds

5. Magnetic Effects of Electric Current

6. Chemical Reactions

These chapters frequently carry higher marks in the CBSE Class 10 Science Board Exam.

What to Skip in the Final 24 Hours

Avoid the following:

• Very lengthy derivations

• Extremely tough HOTS questions

• Extra reference book problems

• Completely new chapters

• Long online video lectures

Stick strictly to NCERT and previously revised material.

Smart Exam-Day Strategy for CBSE Class 10 Science 2026

On the exam day:

• Read the entire question paper carefully

• Attempt easy questions first

• Show complete steps in numericals

• Draw neat, labeled diagrams

• Underline important keywords

Good presentation can help you score better.

Final Checklist Before the Science Class 10 Board Exam

Before going to sleep, confirm:

• All formulas are revised

• Important diagrams are practiced

• Chemical equations are learned

• Definitions are clear

• Sample paper reviewed