Class 10 Science Chapter 13 Our Environment Concept Clarity MCQs with Answers

      Practice these Concept Clarity MCQs from Class 10 Science Chapter 13 – Our Environment to strengthen your understanding of important NCERT concepts.

These CBSE Class 10 Science Chapter 13 Our Environment Concept Clarity MCQs with Answers are designed to improve conceptual understanding rather than rote learning.

Solve these questions to test your understanding of the chapter, strengthen important concepts, and prepare effectively for school and CBSE Board examinations.

Our Environment Concept Clarity MCQs with Answers

Q1. Which of the following is an artificial ecosystem?
a) River (b) Pond (c) Crop field (d) None of these

Q2. Consumers can be classified into which of the following categories?
a) Herbivores (b) Carnivores (c) Parasites (d) All of these

Q3. Which trophic level directly captures solar energy?
a) Primary consumers (b) Producers (c) Secondary consumers (d) Decomposers

Q4. Producers convert solar energy into:
a) Mechanical energy (b) Heat energy (c) Chemical energy (d) Electrical energy

Q5. If a herbivore consumes food containing 5000 units of energy, approximately how much energy becomes available to the secondary consumer?
a) 5000 units (b) 500 units (c) 50 units (d) 5 units

Q6. Which property of pesticides causes biological magnification?
a) They evaporate quickly.
b) They are biodegradable.
c) They are non-degradable.
d) They dissolve completely in water.

Q7. Pesticides can enter food chains because they are:
a) Absorbed by plants along with water and minerals
b) Directly produced by consumers
c) Formed during respiration
d) Manufactured by decomposers

Q8. Which trophic level generally has the greatest number of individuals?
a) Tertiary consumers (b) Secondary consumers (c) Primary consumers (d) Producers

Q9. Which statement correctly distinguishes oxygen (O₂) from ozone (O₃)?
a) Both are deadly poisons.
b) O₂ is essential for aerobic life, whereas O₃ at ground level is beneficial.
c) O₂ is essential for aerobic life, whereas O₃ is a deadly poison but protects Earth in the upper atmosphere.
d) O₃ is essential for respiration, whereas O₂ protects against UV radiation.

Q10. Which of the following best defines a biodegradable substance?
a) A substance that melts when heated.
b) A substance that is broken down by biological processes.
c) A substance that dissolves completely in water.
d) A substance that changes colour over time.


🧠 TopperGuru1 Concept Check

Before checking the answer key, ask yourself these two questions for every MCQ:
✅ Why is the correct option right?
✅ Why are the other three options wrong?
If you can explain both, your concept is truly clear. If not, revise the related NCERT concept and try again.
Remember: Real learning happens when you understand the reason, not when you memorize the answer. 

Answer Key: 

Q1-c | Q2-d | Q3-b | Q4-c | Q5-b | Q6-c | Q7-a | Q8-d | Q9-c | Q10-b


These Class 10 Science Chapter 13 Our Environment Concept Clarity MCQs with Answers are designed to strengthen your understanding of important NCERT concepts rather than promote rote memorization. Regular practice of these application-based questions will help you build a strong conceptual foundation and perform better in school examinations as well as the CBSE Board Exam.

For complete preparation, also practice Assertion-Reason Questions, Case-Based Questions, One-Word Questions, Numericals, Previous Year Questions (PYQs), and Important Extra Questions from this chapter.

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