Difficulty Level, Section Wise Analysis & Answer Key

CBSE Class 10th Science Exam Analysis 2025: The CBSE Class 10 Science Exam 2025 was held on February 20, 2025. As per the initial student reactions, the paper was of moderate difficulty level. To help the students in assessing their performance, we have provided the CBSE Class 10 Science Answer Key 2025 in this article. The answer key has been prepared by subject experts and serves as an important resource for students to cross-check their answers and estimate their scores. Using the answer key allows students to learn from their mistakes and improve their preparation for future exams. This class 10 science breakdown aims to provide a clear picture of the exam’s structure, difficulty level, and important areas for future aspirants.

In this article, we will provide a detailed analysis of the CBSE Class 10 Science exam, including:

• Exam structure and question paper pattern
• Difficulty level
• Student and teacher reactions
• Answer key and expert solutions

Let’s dive into the CBSE Class 10 Science Exam Analysis 2025 to understand how this year’s paper was structured and what students can expect next.

CBSE Class 10 Science Exam Analysis 2025 Highlights

Feature	Details
Board Name	Central Board of Secondary Education (CBSE)
Exam Name	CBSE Class 10th Science Exam
Exam Date	February 20, 2025
Exam Duration	10:30 AM to 1:30 PM (3 hours)
Total Marks	80
Mode of Exam
Time Duration	3 Hours
	Multiple Sets (Set 1, Set 2, Set 3, Set 4)

CBSE Class 10 Science Paper 2025 Overall Difficulty & Structure

The CBSE Class 10 Science Exam 2025 was described as “well-balanced and easy to comprehend” by students and teachers. The overall difficulty level was moderate, meaning it was neither too easy nor too tough. The paper followed the usual CBSE pattern, with questions divided into different sections based on marks and complexity.

Difficulty Level Breakdown

The paper contained a mix of easy, moderate, and difficult questions to test students’ conceptual understanding and application skills. The approximate distribution was:

• Easy questions: 30%
• Moderate questions: 50%
• Difficult questions: 20%

This shows that the exam focused on assessing fundamental knowledge while also including questions to challenge students’ critical thinking. The expected average score ranged between 50 to 60 marks, making it fair for well-prepared students.

Subject-Wise Weightage

The marks distribution across the three subjects was:

• Physics: 25 marks
• Chemistry: 24 marks
• Biology: 31 marks

Biology carried the highest weightage, followed by Physics and Chemistry. This distribution is helpful for students in understanding which subject required more preparation.

CBSE Class 10 Science Section-Wise Analysis (SET 1 – Code 31/4/1)

Section A (1 Mark Each) – Questions 1 to 20

This section comprised 20 very short answer (VSA) questions, testing basic recall and understanding.

• Overall Difficulty: This section was 50% easy, 30% moderate, and 20% difficult.
• Difficulty Level Distribution: There were 10 easy questions, 6 moderate questions, and 4 difficult questions.
• Subject-wise Distribution: This section contained 9 questions from Biology, 5 from Chemistry, and 6 from Physics.
• Detailed Chapter-wise Distribution:
  • Biology: 3 questions from Life Processes, 2 from Heredity, 2 from How Do Organisms Reproduce?, and 2 from Our Environment.
  • Physics: 2 questions from Light: Reflection and Refraction, 1 from Human Eye and Colorful World, and 3 from Electricity.
  • Chemistry: 1 question from Chemical Reactions and Equations, 1 from Acids, Bases, and Salts, 2 from Metals and Non-Metals, and 1 from Carbon and Its Compounds.

There were no confusing or lengthy questions in this section. All questions were based on the prescribed NCERT textbook.

Section B (2 Marks Each) – Questions 21 to 26

This section contained short-answer questions requiring concise explanations.

• Overall Difficulty: This section was easy to moderate.
• Source of Questions: All questions were from the prescribed NCERT textbook.
• Subject-wise Distribution: This section contained 2 questions from Physics, 2 from Chemistry (with an internal choice in one question), and 2 from Biology.
• Detailed Chapter-wise Distribution:
  • Physics: 1 question from Human Eye and Colorful World, 1 from Magnetic Effect of Current.
  • Chemistry: 1 question from Chemical Reactions and Equations, 1 from Metals and Non-Metals.
  • Biology: 1 question from Life Processes, 1 from Heredity.

There were no confusing or lengthy questions in this section. All questions were based on the prescribed NCERT textbook.

Section C (3 Marks Each) – Questions 27 to 33

This section presented more challenging questions requiring detailed explanations.

• Overall Difficulty: This section was moderate to difficult.
• Source of Questions: All questions were from the prescribed NCERT textbook.
• Subject-wise Distribution: This section contained 3 questions from Biology, 2 from Chemistry (with one internal choice), and 2 from Physics.
• Detailed Chapter-wise Distribution:
  • Physics: 1 question from Light: Reflection and Refraction, 1 from Electricity.
  • Chemistry: 1 question from Chemical Reactions and Equations, 1 from Metals and Non-Metals.
  • Biology: 1 question from Our Environment, 1 from Life Processes, and 1 from Control and Coordination.

There were no confusing questions in this section, but some were lengthy. All questions were based on the prescribed NCERT textbook.

Section D (5 Marks Each) – Questions 34 to 36

This section featured long-answer questions carrying the highest marks.

• Overall Difficulty: This section was moderate to difficult.
• Source of Questions: All questions were from the prescribed NCERT textbook.
• Subject-wise Distribution: This section contained 1 question each from Chemistry, Physics, and Biology, with internal choices.
• Detailed Chapter-wise Distribution:
  • Chemistry: 1 question from Carbon and Its Compounds.
  • Physics: 1 question from Magnetic Effect of Current.
  • Biology: 1 question from How Do Organisms Reproduce?

There were some confusing and lengthy questions in this section. All questions were based on the prescribed NCERT textbook.

Section E (4 Marks Each) – Questions 37 to 39

This section consisted of case-based questions.

• Overall Difficulty: This section was moderate to difficult.
• Source of Questions: All questions were from the prescribed NCERT textbook.
• Question Format: The section included 3 case-study-based questions.
• Detailed Chapter-wise Distribution:
  • Biology: 1 question from Control and Coordination.
  • Physics: 1 question from Human Eye and Colorful World.
  • Chemistry: 1 question from Acids, Bases, and Salts.

There were some confusing and lengthy questions in this section. All questions were based on the prescribed NCERT textbook.

CBSE Class 10 Science Question Paper 2025 & Answer Key

The official answer key for the CBSE Class 10 Science Exam 2025 will be released by the Central Board of Secondary Education (CBSE) on its official website. However, students can also refer to expert-curated solutions provided by Aakash Institute (SET 1 – Code 31/4/1) . These solutions are meticulously prepared by experienced faculty members to ensure accuracy and clarity. The Aakash Institute answer key includes detailed explanations for every question, helping students understand the correct answers and rectify any mistakes. It is available for free download, enabling students to compare their responses and assess their expected scores. By referring to these solutions, students can analyze their performance, identify areas of improvement, and strengthen their conceptual understanding for future academic success.

Download CBSE Class 10 Science Answer Key PDF (By Aakash Institute)

For Detailed Subject Wise Analysis for Class 10th Exam, Click the following link:

Click Here – CBSE Class 10 Subject Wise Analysis & Answer Key

Predicting Future Trends

While predicting the exact nature of future exams is impossible, some trends can be observed:

• Increased Focus on Application-Based Questions: CBSE is likely to continue emphasizing application-based questions to test students’ understanding and ability to apply knowledge.
• Case-Based Questions Will Stay: Case-based questions are expected to remain an integral part of the exam.
• Importance of NCERT: The NCERT textbook will continue to be the most important resource.

Conclusion

The CBSE Class 10 Science Exam 2025 was moderately difficult, following a well-structured format. Most questions were from the NCERT textbook, making it easier for students who thoroughly revised the syllabus.

• Biology had the highest weightage, so students who focused more on Biology had an advantage.
• The long-answer and case-based sections were challenging, requiring good time management.
• The paper was balanced, with a fair mix of easy, moderate, and difficult questions.

Overall, students who studied the NCERT syllabus well and practiced previous years’ papers should have found the exam manageable.

CBSE Class 10 Science Exam Analysis 2025 FAQs