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How to Prepare for CBSE Class 12 Practical Exam? Strategy Explained

Written ByAnkita Singha
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Last Updated on02 Oct, 2025
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Preparing for CBSE class 12th examination is an essential stage of any student’s life of excitement, curiosity and mental strength. 

While preparing, have you ever thought of the correct way of preparing “Theory” and “Practical Exam”? 

Learners always consider theoretical parts important as a priority and give minimum time to practical examinations which can impact the overall scorecard. 

By realising later that practical examination marks are also equally important and make a big difference help learners to plan and strategies from the beginning. 

Here, we will provide a detailed outlook on How to Prepare for CBSE Class 12 Practical Exam. Let’s understand everything from syllabus to common mistakes to avoid during practical exams. 

What is CBSE Class 12 Practical Exam? 

The Central Board of Secondary Examination conducts Class 12th practical exams with theory in the months of January and February

Subjects such as Chemistry, Biology, Computer Science, Accountancy, Business Studies etc come under practical examinations. 

In this, marks are given to students based on their: 

  • Experiments / Lab work
  • Maintenance of practical file
  • Attendance & Performance
  • Viva-Voce

The CBSE Class 12 practical exams are with 20 or 30 marks out of 100.

How to Prepare for CBSE Class 12 Practical Exam: Steps to Achieve Good Marks

Learners who want to achieve good marks in CBSE class 12 practical exam can go through the following step by step procedure:

1. Prepare Lab Notebook / Record / Project File:

Preparing a lab notebook / record / project file is one of the important parts of practical examinations in CBSE. 

One must make sure to complete with a clear diagram and alignment easy to understand to the invigilator. 

Remember to revise the file before practical to gain confidence and to prepare well. 

2. Practice CBSE Class 12 Practical Exam Experiments Thoroughly

Practice experiments before CBSE Class 12 practical examinations are important for each learner. To do so 

  • Revise experiments listed in the CBSE syllabus. 
  • Learn common experiments. 
  • Follow step-by-step procedures. 
  • Understand the steps to retain during the practical exam. 

3. Strengthen Theoretical Understanding

Practical examination is not limited to doing a successful practical but also needs theoretical knowledge and understanding. 

To do so, one must know the concept behind experiment, time management for practice viva questions to gain good marks. 

4. Create a Revision & Final-Week Strategy

In the last week of practical examination of CBSE class 12th students must create a revision and final week strategy. 

The strategy must include procedures and objectives of experiments, important questions to revise, mock practical sessions with peers to achieve good marks. 

Explore top revision tips .

5. Exam Day Checklist and Mindset

On the final day of examination learners must have a calm mindset and check wherever everything is ready and systematic. 

Take a deep breath, reduce anxiety and be relaxed to answer every question with confidence in face. 

CBSE Class 12 Practical Exam Pattern & Syllabus: Official Guidelines

As per CBSE official guideline on practical examinations of class 12 students the structure must include:

  • Experiment/Project in Lab
  • Observation and Recording in Practical Notebook
  • Viva-Voce
  • Practical/Project Work Marks Distribution

Physics, Chemistry, Biology, Computer Science or Informatics Practices: 30 Marks. 

Accountancy, Business Studies, Economics, Psychology, Geography: 20 Marks

Learners must check the latest syllabus shared by CBSE official website for confirmation. 

Prepare for CBSE Class 12 Practical Exam: Common Mistakes & Tips from Experts

While preparing for CBSE class 12th practical exam learners deal with consequences or mistakes. 

Given below are some common tips from experts one must know before preparing for CBSE class 12 exam: 

1. Writing a Sloppy Lab Record / Poor Diagrams

There are many students who, due to writing a sloppy lab record or poor diagram, get less marks in CBSE class 12 exam. 

Write a neat handwriting and clear diagram with labels for proper alignment. 

2. Not Understanding the theory Behind Steps

Memorising steps can be logical but difficult, especially in practical examinations. Learn in depth and scientific reason behind the experiment to remember logical answers

3. Rushing through Experiments, Causing Errors

Rushing in experiments or writing can impact the end result of a practical exam. One must perform step-by-step procedures with a relaxed mindset. 

4. Not Backing up Project files or Losing Records

Sometimes last minute problems like loss of project files or records in computers can negatively impact the marks of students. Remember to keep multiple copies or in drive for emergency purposes

5. Ignoring Safety Precautions

Ignoring the safety precautions like accidents with chemicals can happen. So following the steps with safety tools is a must. 

Conclusion

The CBSE 12 practical exam is one of the ideal opportunities to score higher marks. However, it requires consistent knowledge of experiment and concepts, neat practical books and viva. 

By exploring common mistakes and tips students can understand how to prepare for CBSE class 12 practical exam to achieve good marks. 
Remember, practical is not just for gaining marks but also a project-based learning and connection with the real world by performing experiments.

FAQs

CBSE Class 12 practical exams out of 30 marks which are added to theory marks (70+30) totaling 100 marks for the subject.  

Learners who want to score full marks in the practical examination need to revise manuals, understand the theory, practical experiment and stay calm and confident. 

Yes. Practical and internal assessment marks are added to the final CBSE result. The overall marks are a combination of both theory and practical. 

The viva-voce questions are asked by invigilators based on the experiment, project, and subject knowledge. Stay focused on practical subjects and practical related questions. 

Practical exams are easy to crack for students when he or she study throughout the year. Practice viva-voce, maintain lab content proper with experiments help students to score good marks. 

Yes, anyone can achieve 100 in CBSE 12th examination by consistent learning, hard work, regular practice and following study routine. A positive and disciplined mindset helps in scoring desired marks. 

Many learners shifted from CBSE to state board and viva-voce the CBSE 12th syllabus is considered as tough as compared to state board. 

For CBSE Class 12th the top 5 rules include:

  • One must achieve at least 33% in each subject. 
  • One must be a language subject like English. 
  • Students need to pass in All 5 Core Subjects. 
  • The percentage is calculated with the highest five scores out of six subjects. 
  • One must appear for at least five subjects.

There is no hardest set in a CBSE board. Each set is designed based on the average person ability including both hard, moderate and easy questions. 

Ankita Singha

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I, Ankita Singha is a passionate content writer at 21kschool with 1.5 years of experience in crafting engaging digital content in different domains. With a talent for storytelling and visual expression, I blend creativity and strategy seamlessly. Outside of work, I enjoy crafting new things, calligraphy, and dancing.

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