If you want high marks in Class 10 Science, start with most repeated questions from PYQs. At Aakash, our analysis of the previous question papers shows clear patterns for certain diagrams, numericals, and definitions. Practising these through the CBSE Class 10 Science Sample Paper and curated lists of important questions can secure a strong score quickly. This guide highlights those recurring questions subject-wise, based on trends followed.
Physics: High-Frequency Questions in Class 10 Science
Physics questions repeat because concepts remain constant.
Electricity (Most Repeated Unit)
| Repeated Question | Format | Must Practice |
| Ohm’s Law numericals | Numerical | V = IR problems |
| Resistance in series/parallel | Easy scoring | Equivalent resistance |
| Electric power calculations | Direct formula-based | P = VI, P = I²R |
| Heating effect of current | Application based | Fuse, appliances |
Almost every Previous Year Question Paper Class 10 Science includes at least one numerical from Electricity.
Light: Reflection & Refraction
| Repeated Question | Format | Must Practise |
| Ray diagrams (mirror/lens) | Diagram + explanation | Sign convention |
| Mirror formula numericals | Calculation | 1/f = 1/v + 1/u |
| Magnification | Short problem | Image nature |
Tip: To score well in light questions practise labelled diagrams daily.
For Human Eye & Optical Instruments frequently repeated Short Answer Questions:
Chemistry: NCERT-Based Repetition in Class 10 Science
Chemistry questions are highly predictable, often coming direct from NCERT, because they stick to textbook reactions based on Class 10 science Syllabus for board exam.
Chemical Reactions & Equations
| Repeated Question | Focus Area | Must Practise |
| Balance equations | Step method | Hit-and-trial method |
| Identify reaction type | Short Answer | Combination, displacement |
| Corrosion and rancidity | Conceptual | Real-life examples |
Acids, Bases and Salts
The following are the common long and short questions. These appear frequently in the CBSE Class 10 Science Sample Paper sets:
- pH scale interpretation
- Properties of acids vs bases
- Uses of baking soda, washing soda
- Neutralisation reactions
Metals and Non-Metals
| Repeated Question | Format | Must Practise |
| Reactivity series | Direct theory | Correct order |
| Extraction of metals | Long answer / Flowchart | Steps involved |
| Ionic compounds properties | Conceptual | Melting point, conductivity |
Carbon and Its Compounds is a very high scoring unit. Repeated questions include:
Many important questions for Class 10 Science compilations place this chapter at the top.
Biology: Diagram-Heavy Repetition in Class 10 Science
Biology tends to reward labelled diagrams and keywords oriented answering. The following kinds of questions are the most repeated.
Life Processes
| Repeated Question | Format | Must Practise |
| Human digestive system | Labelled diagram | Organs and functions |
| Respiration types | Comparison | Aerobic vs anaerobic |
| Transportation in plants | Short answer | Xylem and phloem roles |
Control and Coordination
Frequently asked:
Reproduction
| Repeated Question | Format | Must Practise |
| Human reproductive system diagram | Labelled diagram | Parts and functions |
| Asexual vs sexual reproduction | Comparison | Examples |
| Contraceptive methods | Short answer | Types and purpose |
Heredity and Evolution
High-probability theory questions:
- Mendel’s laws
- Monohybrid cross
- Genotype vs phenotype
- Acquired vs inherited traits
Environmental Science Chapters (Short but Scoring)
Often given less focus by many students, but these topics are usually asked as short answers or case-based questions.
| Repeated Question | Format | Must Practise |
| Food chains and food webs | Diagram / Short answer | Trophic levels |
| Ozone depletion | Conceptual | Causes and effects |
| Waste management methods | Short answer | 3Rs, segregation |
| Sustainable development | Conceptual | Key principles |
Most Repeated Diagram Questions
| Subject | Repeated Question | Format | Must Practise |
| Physics | Ray diagrams, electric circuit | Diagram | Correct labels |
| Chemistry | Covalent bonding structures | Diagram | Electron dots |
| Biology | Human organs, reflex arc | Diagram | Neat presentation |
Practising diagrams from the CBSE Class 10 Science Sample Paper improves presentation marks.
Also Read: Some Important Articles for Class 10 Science Exam 2026
- Smart Practice with Class 10 Science Previous Year Papers & Solutions
- Class 10 Science Paper Pattern: Marks Distribution & Important Topics
- Tips for Class 10 Science Final Revision: Important Questions & Formulas
- How to Score High in Class 10 Science: Smart Preparation Tips
- Class 10 Science Easy & High Scoring Units – Subject-wise Guide
- Important Diagrams of Class 10 Science with Questions (Board Exam)
- Important Formulas of Class 10 Science (Chapter-wise) with MCQs
- Class 10 Science Exam 2026 Complete Guide: Syllabus, Exam Pattern & Weightage
CBSE Exam Class 10 Syllabus, Sample Papers & Solutions (2026)
- CBSE Class 10 Date Sheet 2026
- CBSE Class 10 Syllabus 2026
- CBSE Class 10 Sample Papers 2026
- CBSE Class 10 Mock Test Paper Solutions
Visual Story:
Smart Strategy to Use PYQs in Class 10 Science (What Toppers Do)
Here are 5 proven strategies that have helped toppers over the years:
1. Solve at least 5 full papers
Toppers treat every previous year question paper like a real exam. Sit for a full 3 hours, no breaks, no phone. This builds stamina and reduces panic on the actual day. Many students know answers but lose marks due to exam pressure. Simulated practice fixes that.
2. Analyse mistakes topic-wise
Checking answers is not enough. Group mistakes by chapter. For example, repeated errors in numericals from Electricity or confusion in Carbon compounds reactions signal weak areas. Maintain a “mistake notebook” for Class 10 Science. Review it before every mock test.
3. Revise all the repeated areas
PYQs reveal patterns. If ray diagrams, Mendel’s laws, or pH questions appear frequently, prioritise them. This is why curated lists of important questions for Class 10 Science are powerful. Smart revision beats random revision.
4. Practise time management
Divide your paper strategy beforehand. Attempt easy 1-markers first, then medium questions, and keep long answers for later. Use the CBSE Class 10 Science Sample Paper to test different approaches and see what suits you best.
5. Quick Revision Checklist
- Definitions from NCERT: Many direct questions come straight from textbook lines. Learn exact wording.
- Formula sheet for Physics: Revise daily. Most Physics questions are formula based.
- Chemical equations list: Balance them from memory. Reaction conditions matter.
- Biology diagrams notebook: Practise neat, labelled diagrams. They fetch guaranteed marks in Class 10 Science exams.
CBSE 10 Class Board Exam 2026 Preparation Tips & Strategy
-
- CBSE Class 10 Exam Preparation Tips 2026 – Complete Subject-Wise Guide
- How to Score Good Marks in CBSE Class 10 Board Exam 2026
- Best Revision Strategy for Class 10 Board Exam 2026 Students
- Smart Study Tips to Score Above 90% in CBSE Class 10 Board Exam 2026
- How to Prepare for CBSE Class 10 Board Exam 2026 Before the Exam
- Download CBSE Class 10 Subject-Wise Syllabus 2025-26 PDF
- CBSE Class 10 Board Percentage Calculation from CGPA
Final Takeaway
Scoring high in Class 10 Science is less about studying everything and more about studying smart. Repeated questions from the list of important questions for Class 10 Science, and timed solving of the CBSE Class 10 Science Sample Paper can dramatically improve results. Focus on diagrams, numericals, and NCERT-based theory. Revise fast. Practise consistently. Walk into the exam confident.
FAQs
Q1. Which chapters give maximum marks in Class 10 Science?
Electricity, Light, Carbon and Compounds, Life Processes, and Heredity consistently carry high weightage in Class 10 Science.
Q2. How many important questions for Class 10 Science should I practise?
Focus on 50 to 70 high-frequency questions from PYQs and sample papers rather than random practice.
Q3. Are PYQs enough to score well in boards?
PYQs cover the pattern and commonly repeated concepts. Combine them with NCERT reading for the best results.
Q4. How useful is the CBSE Class 10 Science Sample Paper?
Very useful. It reflects the latest exam pattern and question style introduced by CBSE.
