Chapter 15 MCQs For AMU/JMI XI-Dip.Engg. Entrance Test

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Science Class X: Chapter-1,Chapter-2,Chapter-3,Chapter-4,Chapter-5,Chapter-6,Chapter-7,Chapter-8,Chapter-9, Chapter-10 Chapter-11 Chapter-12 Chapter-13 Chapter-14    
Chapter 15  : Our Environment    Answers
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1. A natural  phenomenon  that becomes  harmful due to pollution is _______________

a. Global warming

b. Ecological balance

c. Greenhouse effect

d. Desertification

2. The pollutant responsible for ozone holes is________________

a. Carbon dioxide

b. Sulphur dioxide

c. Carbon monoxide

d. CFC

3. One of the best solution to get rid of non-biodegradable wastes is

a. Burning

b. Dumping

c. Burying

d. Recycling

4. Animal dung is _________ waste

a. Biodegradable

b. Non-biodegradable

c. Hazardous

d. Toxic

5. Which of the following is  biodegradable

a. Iron nails

b. Plastic mugs

c. Leather belts

d. Silver foil

6. Which of the following is non- biodegradable

a. Animal bones

b. Nylon

c. Tea leaves

d. Wool

7. Name one non-biodegradable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly

a. DDT

b. CFC

c. Radioactive substances

d. PAN

8. In a lake polluted with pesticides, which of the following will contain the maximum   amount of pesticides

a. Small fish

b. Microscopic animals

c. Big fish

d. Water birds

9. Name the substance whose accumulation in pelicans of lake Michigan led to the formation of thin shells of their eggs

a. CFC

b. PAN

c. DDT

d. PAC

10. Name the process in which a harmful chemical enters the food chain and gets   concentrated

        at each  level in the food chain.

a. Concentration

b. Bio magnification

c. Expansion

d. Pollution

11. Which of the following is a bio-degradable waste

a. Glass

b. Plants

c. Plastics

d. Polythene

12. Which of the following is a  non bio-degradable waste

a. Virgin plastic

b. Plastic

c. Plants

d. Fungi

13. The constituents which do not form ecosystem are

a. Biotic  constituents

b. Plastic bags

c. Abiotic constituents

d. All of these

14. The functional unit of environment is

a. Ecosystem

b. Nitrogen

c. Carbon

d. Oxygen

15. Which of the following is an example of producers

a. Plastic pens

b. Plastic cans

c. Polythene

d. Green plants

16. Which of the following is an example  of herbivore

a. Cow

b. Shark

c. Lion

d. Tiger

17. Which of the following is not an example of  abiotic factors

a. Light

b. Plants

c. Heat

d. Temperature

18. ____________  is not a biodegradable pollutant

a. Paper

b. Cotton cloth

c. Cotton

d. DDT

19. Which of the following is terrestrial ecosystem

a. A natural forest

b. A lake

c. A pond

d. An aquarium

20. _________ is an  omnivore animal

a. Lion

b. Hawk

c. Jackal

d. Man

21. The formula of ozone is 

a. O3

b. O2

c. O4

d. O6

22. The number of atoms of oxygen  present in ozone are

a. 3

b. 4

c. 2

d. 1

23. What percentage of sunlight is captured by plants to convert it into food energy

a. 1%

b. 10%

c. 50%

d. More than 50%

24. Flow of energy in an ecosystem is always

a. Multidirectional

b. Bidirectional

c. Unidirectional

d. Non-directional

25. Which of the following is a non-biodegradable

a. Tea leaves

b. Nylon

c. Remains of animals

d. Fleece of sheep

Answers

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Science Class X: Chapter-1,Chapter-2,Chapter-3,Chapter-4,Chapter-5,Chapter-6,Chapter-7,Chapter-8,Chapter-9, Chapter-10 Chapter-11 Chapter-12 Chapter-13 Chapter-14    

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