Class 10 · Science · Chapter 24

Board Paper 2020 Set 31-2-1 with Solutions: complete notes

Neat, exam-ready notebook-style notes for Board Paper 2020 Set 31-2-1 with Solutions, following your NCERT book. This chapter is part of the complete Class 10 Science PYQ Book: Solved Board Papers 2016-2026 (CBSE).

Free: NCERT solutions for Class 10 Science →

What you get in the pack

• 10 years of CBSE Class 10 Science board papers: 2016 to 2026 (17 papers)
• All 13 chapters and 17 board papers complete
• Part A: all 13 chapters, questions sorted chapter-wise and by marks
• Year-wise weightage table and most-asked topics for every chapter
• Part B: each full board paper followed by its complete solutions, for timed practice
• Answers written to the CBSE marking-scheme points, with labelled diagrams drawn to scale
• Questions on deleted topics flagged; only the 2026-27 syllabus in Part A

All chapters in this pack

1. PYQ Ch 1 Chemical Reactions and Equations
2. PYQ Ch 2 Acids, Bases and Salts
3. PYQ Ch 3 Metals and Non-metals
4. PYQ Ch 4 Carbon and its Compounds
5. PYQ Ch 5 Life Processes
6. PYQ Ch 6 Control and Coordination
7. PYQ Ch 7 How do Organisms Reproduce
8. PYQ Ch 8 Heredity
9. PYQ Ch 9 Light Reflection and Refraction
10. PYQ Ch 10 The Human Eye and the Colourful World
11. PYQ Ch 11 Electricity
12. PYQ Ch 12 Magnetic Effects of Electric Current
13. PYQ Ch 13 Our Environment
14. Board Paper 2026 Set 31-2-1 with Solutions
15. Board Paper 2026 Set 31-3-1 with Solutions
16. Board Paper 2025 Set 31-1-1 with Solutions
17. Board Paper 2025 Set 31-2-1 with Solutions
18. Board Paper 2024 Set 31-4-1 with Solutions
19. Board Paper 2024 Set 31-5-1 with Solutions
20. Board Paper 2023 Set 31-2-1 with Solutions
21. Board Paper 2023 Set 31-4-1 with Solutions
22. Board Paper 2022 Term 2 Set 31-1-1 with Solutions
23. Board Paper 2022 Term 2 Set 31-3-1 with Solutions
24. Board Paper 2020 Set 31-2-1 with Solutions
25. Board Paper 2020 Set 31-4-1 with Solutions
26. Board Paper 2019 Set 31-2-1 with Solutions
27. Board Paper 2019 Set 31-4-1 with Solutions
28. Board Paper 2018 Set 31-1 with Solutions
29. Board Paper 2017 Set 3 with Solutions
30. Board Paper 2016 Set 31-1 with Solutions