Home » Our Environment Class 10 Science MCQ With Solutions

Our Environment Class 10 Science MCQ With Solutions

Update on: 02 Feb 2024, 11:57 AM

The Our Environment Class 10 Science MCQ with Answers is designed according to the latest Class 10 Science syllabus. and examination pattern recommended by CBSE for Standard 10. Students can also refer to more Chapter-wise MCQs for NCERT Class 10 Science. This resource will be particularly beneficial for students aiming to achieve high marks in their academic studies, as it allows them to practice multiple-choice questions on specific subjects.

Latest – Magnetic Effects of Electric Current Class 10 Science MCQ With Solutions

Important – Class 10 Maths MCQ: Free Chapter-Wise PDFs

CBSE Class 10 Chapter 13 Our Environment MCQs

Check below the MCQ Questions for class 10 Science with answers and Clear your idea of chapter 13 Our Environment.

Q.1. The process of entry of pollutants into a food chain is known as

(a) biomass (b) biomagnification
(c) bioaccumulation (d) biosphere

Answer

(c): Bioaccumulation is the accumulation of substances such as pesticides or other chemicals in an organism. It occurs when an organism absorbs a substance at a rate faster than that at which the substance is lost by catabolism and excretion.

Practice More – CBSE Practice Papers Class 10 (2024) – Free PDF Download

Q.2. In the food chain given below, if the amount of energy available at fourth trophic level is 3 kJ, what was the energy available at the herbivore level?
Grass → Grasshopper → Frog → Snake → Hawk

(a) 3000 kJ (b) 300 kJ
(c) 30 kJ (d) 3 kJ

Answer

Q.3. Acid rain is caused by

(a) sulphur oxides only
(b) nitrogen oxides only
(c) both nitrogen and sulphur oxides
(d) none of these

Answer

(c): Acid rain is caused by oxides of nitrogen (e.g., NO₂ and NO₃ ) and oxides of sulphur (e.g., SO₂ and SO₃ ).

Also Check – CBSE Sample Papers Class 10 for 2024 Board Exams

Q.4. In the given figure, various trophic levels are shown in a pyramid. At which trophic level minimum energy is available?

question 4

(a) T₄ (b) T₂
(c) T₁ (d) T₃

Answer

(a): T1 has maximum energy and it keeps on reducing as we proceed to the next higher trophic levels. Hence, T4 will have the minimum energy.

Q.5. The right path of energy flow in an ecosystem is

(a) Producer → Herbivore → Carnivore
(b) Producer → Carnivore → Herbivore
(c) Herbivore → Carnivore → Producer
(d) Herbivore → Producer → Carnivore.

Answer

(a): Energy flows in an ecosystem in the following direction:
Producer → Herbivore → Carnivore

Q.6. Minamata disease is due to

(a) MIC gas (b) methyl mercury
(c) lead nitrate (d) cobalt chloride.

Answer

(b): Minamata disease is a neurological disorder caused by methyl mercury poisoning. It was first reported near Minamata Bay in Japan in 1956. The symptoms include ataxia, numbness in hands and feet, muscle weakness, damage to hearing and speech.

Q.7. According to Charles Elton, which is not correct?

(a) Carnivores at the top of the pyramid.
(b) Producers at the top of the pyramid.
(c) Energy trapping is high at the top of the pyramid.
(d) Both (b) and (c)

Answer

(d): Charles Elton developed the concept of ecological pyramid. After his name, these pyramids are called as Eltonian pyramids. According to Charles Elton, producers are present at the base of the pyramid and carnivores at the top. According to 10% law of energy transfer, energy goes on decreasing with increase in trophic levels. Thus, energy trapping is high at the base of the pyramid and lowest at top of the pyramid.

Q.8. Which of the followings is abiotic component of an ecosystem?

(a) Producer (b) Consumer
(c) Soil and minerals (d) All of these

Answer

(c): All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem. Thus, an ecosystem consists of biotic components comprising living organisms and abiotic factors like temperature, rainfall, wind, soil and minerals

CBSE Class 10 Resources – Important Formula Book For 10th Science

Q.9. In a food chain usually the following are found at the third trophic level

(a) producers (b) primary consumer
(c) decomposer
(d) secondary consumer.

Answer

(d): The transfer of food or energy takes place in the various steps or levels in the food chain which are known as trophic levels. Producers or autotrophs are the first trophic level because they fix up the solar energy and make it available for the heterotrophs or the consumers to the next trophic level. Herbivores (primary consumers) are in second trophic level, secondary consumers (carnivores) are in third trophic level and so on.

Q.10. In a given food chain if frog has 100 J of energy then the energy available with plants and snake respectively will be
Plants → Insect → Frog → Snake

(a) 1000 J and 10 J (b) 10000 J and 10 J
(c) 10 J and 1000 J (d) 1000 J and 100 J.

Answer

(b): According to 10% law of energy transfer in a food chain, if a frog has 100 J of energy then the energy in plants will be 10,000 J, 1,000 J in insect and it will be 10 J in snake

CBSE Class 10 Science Our Environment MCQs – PDF Download

Answers-

Summary for NCERT class 10 science chapter 13 – “Our Environment”

The various components of an ecosystem are interdependent.
The producers make the energy from sunlight available to the rest of the ecosystem.
There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food-chain.
Human activities have an impact on the environment.
The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment.
The waste we generate may be biodegradable or non-biodegradable.
The disposal of the waste we generate is causing serious environmental problems.

Best Reference Books for Class 10 Science

We hope the MCQs for the CBSE Class 10 Science Chapter 13 on Our Environment are helpful for your board exam preparation.

Keep learning and stay updated with us for more CBSE exam updates.

Leave a Reply Cancel reply

CBSE

Complete FAQ Guide – MTG ScoreMore Sample Paper Series

Update on: 01 Sep 2025, 04:18 PM

Preparing for the Class 10 & 12 CBSE Board Exams can feel overwhelming, but the right guidance and support make it easy for them. Students need to understand what the CBSE board demands this year, and for that, CBSE just released the latest CBSE sample…...

CBSE

Complete FAQ Guide – MTG Foundation Course Series

Update on: 29 Aug 2025, 12:47 PM

Everyone is aware of today’s cut-throat competition. Whether it is school exams, competitive exams, or any entrance test like JEE and NEET. Every student needs to be at the top, but there are only a few who reach to the top and make a difference.…...

CBSE

Decoding the New CBSE 2026 Exam Pattern

Update on: 25 Aug 2025, 05:29 PM

The Central Board of Secondary Education (CBSE) has introduced significant changes to its exam pattern for Classes 10 and 12 in recent years,aligning with the National Education Policy 2020 (NEP 2020). These changes are aimed at encouraging deeper understanding of concepts and reducing rote memorization.…...

CBSE

MTG ScoreMore 15 Sample Question Papers for Class 12: Released for CBSE Session 2025–26

Update on: 22 Aug 2025, 02:27 PM

As the CBSE Class 12 board exams approach, you have to be ready. If you want to score high in the 12th board exam, you have to stay ahead by being prepared with the right tools. With the recent changes in the CBSE Class 12…...

CBSE

MTG ScoreMore 15 Sample Question Papers for Class 10: Released for CBSE Session 2025–26

Update on: 20 Aug 2025, 03:00 PM

As the Class 10 boards come closer, you have to be ready. If you want to score high in the 10th board exam, you have to stay ahead by being prepared with the right tools. With the recent changes in the CBSE Class 10 sample…...

CBSE

5 Real-Life Applications of Trigonometry for Class 10 That Make Learning Meaningful

Update on: 18 Aug 2025, 04:51 PM

Terms like sine, cosine, and tangent can feel abstract and disconnected from real life. But the truth is, trigonometry is all around us. It is used in fields like architecture, game design, sports, space science, and the phone’s GPS. For many students, trigonometry appears overwhelming,…...

CBSE

CBSE Class 10 Sample Papers 2025-2026 – Free PDF Download

Update on: 15 Aug 2025, 04:10 PM

Latest Free CBSE Class 10 Sample Papers (Scoremore) 2025 PDF From MTG Subjects Sample Question Paper Science Download Mathematics Basic Download Mathematics Standard Download English Download Social Studies (SST) Download You can find every CBSE sample paper for class 10 here along with the latest…...

CBSE

MTG’s Great Freedom Festival 2025: Celebrate the Freedom to Learn!

Update on: 10 Aug 2025, 10:00 AM

Freedom is the Grandest reason to celebrate and, on the occasion of the 79th Independence Day, we have come up with deals like never before! MTG presents to you, “The Grand Freedom Carnival” on its web store from 12-16 August 2025. Mark the dates and don’t…...

CBSE

CBSE Sample Paper Class 12 for 2025-26 Boards | FREE PDF Download

Update on: 31 Jul 2025, 04:00 PM

CBSE has uploaded the latest Class 12 sample papers for the 2025–26 academic session on its official academic website. As expected, the CBSE sample papers are packed with competency-based questions designed to assess students’ analytical and application abilities. Students are advised to focus on deep…...

CBSE

CBSE Class 10 Board Exams Now Twice a Year – Starting 2026! Check Complete Details

Update on: 26 Jun 2025, 05:13 PM

Highlights 💡 Two Board Exam Attempts: Students get two board exam attempts in the same academic year — Feb 17 to Mar 6 (main) and May 5 to 21 (improvement). 💡 Improve Up to Three Subjects: Both attempts cover the full syllabus, and students can…...