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CBSE Class 10 · Science · 24 past questions

Topic Energy flow and the 10 percent law 3 Food chains and trophic levels 3 Biodegradable and non-biodegradable waste 2 Biomagnification and pesticides 2 Ecosystem components and balance 1 Ozone layer depletion 1

Level Easy 1 Moderate 0

Year 2026 1 2025 1 2024 1 2023 0

1 of 24 · show all

Q5 2026