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Class 10 Science — Chapter 13: Our Environment
66 practice questions · 22 Easy · 22 Medium · 22 Hard
Free NCERT-aligned multiple-choice practice for Class 10 Science, Chapter 13 (Our Environment). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 66.
Sample questions
Q1Easy
In a food chain, plants are:
A.Producers✓ correct
B.Consumers
C.Decomposers
D.Predators
Why
Plants make food via photosynthesis.
Q2Medium
According to the 10% law, energy passed to next trophic level is:
A.100%
B.10%✓ correct
C.50%
D.1%
Why
Only ~10% energy transfers up; rest is lost as heat.
Q3Hard
Ozone layer depletion is caused by:
A.CO₂
B.CFCs (chlorofluorocarbons)✓ correct
C.O₂
D.N₂
Why
CFCs release Cl atoms that destroy ozone.
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