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Our Environment
CBSE Class 10 · Science · 24 past questions
Topic
Biomagnification and pesticides
6
Energy flow and the 10 percent law
5
Food chains and trophic levels
5
Biodegradable and non-biodegradable waste
4
Ozone layer depletion
3
Ecosystem components and balance
1
Level
Easy
1
Moderate
2
Year
2026
1
2025
1
2024
1
2023
0
3 of 24 ·
show all
Q5
2026
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Q16
2025
Assertion (A) : The amount of ozone in the atmosphere began to drop sharply in the 1980s.…
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Q19
2024
Consider the following statements about ozone…
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