Class 10 Science MCQ Questions of Our Environment with Answer

The Class 10 Science MCQ Questions of Our Environment with Answer have been set up according to the most recent syllabus, and examination pattern recommended in Standard 10 by CBSE. CBSE MCQ Question for Class 10 Science Our Environment with Answer accessible. Multiple Choice Questions for a significant part of exams for class 10 science and whenever practiced appropriately can assist you with getting better grades. Alludeor revise to more Chapter-wise MCQs for NCERT Class 10 Science.

It will be exceptionally helpful for those students who will get great marks in their academics. MCQ Questions for Class 10 Science Chapter Our Environment with Answer will assist students with practicing multiple choice questions of particular subjects.

1. The formula of Ozone is _______

(a) \(O_3\)
(b) \(O_2\)
(c) \(O_4\)
(d) \(O_6\)

Answer:

(a) \(O_3\)

2. _______ is an omnivore animal.

(a) Lion
(b) Hawk
(c) Jackal
(d) Man

Answer:

(d) Man

3. _____ is not a biodegradable pollutant.

(a) Paper
(b) Cotton cloth
(c) Cotton
(d) DDT

Answer:

(d) DDT

4. We should reduce the use of the plastic bags, bottles etc. because:

(a) They are not durable
(b) They are non-biodegradable
(c) They are made of toxic materials
(d) They react with the atmospheric gases

Answer:

(b) They are non-biodegradable

Explanation: Plastics bags and bottles come under the category of non-biodegradable products because they cannot be broken down by natural process and tend to damage the safety of the environment.

5. Which among the following statements is incorrect in view of the plants?

(a) They convert the solar energy into mechanical energy
(b) They prepare their food from organic compounds
(c) They are also called producers
(d) They are the initial source of energy in a food chain

Answer:

(b) They prepare their food from organic compounds

Explanation: Plants prepare food from sunlight and inorganic constituents like carbon dioxide and water.

6. In natural ecosystems, decomposers include-

(a) only bacteria and fungi
(b) only microscopic animals
(c) herbivores and carnivores
(d) both (b) and (c)

Answer:

(a) only bacteria and fungi

7. The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about-

(a) 1%
(b) 8%
(c) 5%
(d) 10%

Answer:

(a) 1%

8. Which of the following is not a terrestrial ecosystem-

(a) forest
(b) desert
(c) aquarium
(d) grassland

Answer:

(c) aquarium

9. In the garden ecosystem, which of the following are producers?

(a) Insects
(b) Snakes
(c) Grasses
(d) Rabbits

Answer:

(c) Grasses

10. Which of the following is an autotroph?

(a) Lion
(b) Insect
(c) Tree
(d) Mushroom

Answer:

(c) Tree

11. Ozone layer is damaged by-

(a) methane
(b) carbon-dioxide
(c) Sulphur-dioxide
(d) CFCs

Answer:

(d) CFCs

12. Acid rain is caused due to _______.

(a) Carbon oxides
(b) Nitrogen oxides
(c) Sulphur oxides
(d) both b and c

Answer:

(d) both b and c

13. Edaphic factors include ______.

(a) Abiotic components
(b) Biotic components
(c) Producers
(d) Consumers

Answer:

(a) Abiotic components

14. In a food chain the second trophic level is occupied by:

(a) Carnivores
(b) Autotrophs
(c) Herbivores
(d) Producers

Answer:

(c) Herbivores

Explanation: Herbivores occupy the second trophic level after autotrophs or producers.

15. Which among the following is a correct full form for DDT?

(a) Dichloro-diphenyl-trichloroethane
(b) Dichloro-diphenyl-tetrachloroethane
(c) Dichloro-decaphenyl-trichloroethane
(d) Dichloro-diethyl-trichloroethane

Answer:

(a) Dichloro-diphenyl-trichloroethane

Explanation: The full form of DDT is Dichloro-diphenyl-trichloroethane. It is known for its insecticidal properties.

16. Which of the following radiations is responsible for the conversion of atmospheric oxygen to ozone?

(a) Gamma radiations
(b) Cosmic radiations
(c) Infrared radiations
(d) Ultraviolet radiations

Answer:

(d) Ultraviolet radiations

Explanation: UV radiation is a highly damaging radiation, which when enters the environment can change atmospheric nitrogen into ozone.

17. Global warming is a phenomenon related to:

(a) Evaporation
(b) Ecological balance
(c) Greenhouse effect
(d) Desertification

Answer:

(c) Greenhouse effect

Explanation: The increase in greenhouse gases in the environment leads to global warming.

18. Which of the two sets belong to the same trophic level?

(a) Rabbit: Tiger
(b) Vulture : Rat
(c) Grasshopper : Hawk
(d) Frog : Lizard

Answer:

(d) Frog : Lizard

19. An ecosystem includes

(a) all living organisms
(b) non-living objects
(c) both living organisms and non-living objects
(d) sometimes living organisms and sometimes non-living objects

Answer:

(c) both living organisms and non-living objects

20. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

(a) heat energy
(b) light energy
(c) chemical energy
(d) mechanical energy

Answer:

(c) chemical energy