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MCQ Science Class 10
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Science Class 10

Our Environment

CBSE Board

Teacher Name : Rakesh
Total Questions : 22
Time Allowed : 60
Total Marks : 22

Q 1 :Which man-made material cannot be decomposed by the action of bacteria ?
- Human flesh
- Vegetable peel
- Flesh of a dead animal
- Plastic
Q 2 :Which of the following is an example of abiodegradable substance ?
- Plastic
- Plant
- Glass
- Polythene
Q 3 :Which of the following is an example of non-biodegradable substance ?
- Vegetable peels
- Plants
- Plastic
- Plant products
Q 4 :Which of the following actions may not affect the environment adversely?
- Plastic bags buried inside the earth
- Planting of tree
- Excessive use of non-biodegradable pesticides
- Burning of plastic bags
Q 5 :which of the following constituents do not comprise an ecosystem?
- Biotic constituents
- Abiotic constituents
- Plastic bags
- All of the above
Q 6 :Which of the following is an example of a man-made ecosystem?
- Forest
- desert
- River
- Aquarium
Q 7 :Which of the following is a functional unit of environment?
- Atmosphere
- Biosphere
- Plants
- Ecosystem
Q 8 :Which of the following is an example of a herbivore?
- Lion
- Tiger
- Shark
- Cow
Q 9 :Which of the following is the correct full form of CFC?
- Carbonchlorofluorine
- Chlorofluorocarbon
- Chlorinfluidcarbon
- Chlorofluorinecarbon
Q 10 :Which of the following is not an abiotic factor?
- Plants
- Heat
- Temperature
- Light
Q 11 :Which of the following is the correct full form of UNEP?
- United National Energy Programme
- United Nations Environment Programme
- Union of non-Environmental Plan
- Unique National English Programme
Q 12 :Which of the following is not a biodegradable pollutant?
- Paper
- Cotton
- DDT
- Cotton cloth
Q 13 :Which of the following is a terrestrial ecosystem?
- A lake
- A pond
- An aquarium
- A natural forest
Q 14 :Animals in which of the following pairs belong to the same trophic level?
- Hawk and spider
- Cockroach and spider
- Lizard and spider
- Lizard and hawk
Q 15 :By which of the following conversions do the autotrophs produce food?
- Conversion of solar energy into chemical energy
- Conversion of solar energy into biogas
- Conversion of biogas into chemical energy
- Conversion of chemical energy into solar energy
Q 16 :Which of the following is an omnivore?
- Lion
- Hawk
- Jackal
- Man
Q 17 :Which of the following is a proper sequence from higher to lower trophic levels?
- Producers, Herbivores, Top carnivores, Carnivores
- Top carnivores, Carnivores, Herbivores, Producers
- Carnivores, Top carnivores, Producers, Herbivores
- Herbivores,Carnivores, Producers, Top Carnivores
Q 18 :Which of the following is an example of a food chain?
- Grass →Deer→Lion
- Fish →Deer →Algae
- Algae →Diatoms→Fish
- Grass →Frog →Birds
Q 19 :Which of the following is the molecular formula of ozone?
- Oₒ
- O₂
- O₄
- O₆
Q 20 :How many atoms of oxygen are there in a molecule of ozane?
- 3
- 4
- 2
- 1
Q 21 :Which of the following is the nature of ozone?
- It is deadly poisonous.
- It is fragrant.
- It is smooth.
- It causes purple smoke.
Q 22 :Which of the following devices do not produce CFCs?
- Fire extinguishers
- Pencils
- Refrigerators
- Pressurised cans

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