Environment MCQ & Objective Questions
The study of the environment is crucial for students preparing for school and competitive exams. Understanding environmental concepts not only enhances your knowledge but also helps in scoring better. Practicing MCQs and objective questions related to the environment allows you to grasp important topics effectively, making your exam preparation more efficient. With a focus on practice questions, you can tackle important questions with confidence.
What You Will Practise Here
Fundamentals of Ecology and Ecosystems
Types of Natural Resources and Their Conservation
Environmental Pollution: Causes and Effects
Climate Change and Global Warming
Biodiversity and Its Importance
Environmental Laws and Policies in India
Renewable and Non-Renewable Energy Sources
Exam Relevance
The topic of the environment is significant in various examinations such as CBSE, State Boards, NEET, and JEE. Questions often focus on the impact of human activities on the environment, conservation methods, and ecological principles. Common question patterns include multiple-choice questions that test your understanding of definitions, causes, and effects related to environmental issues. By mastering these concepts, you can enhance your performance in these competitive exams.
Common Mistakes Students Make
Confusing terms like 'biodegradable' and 'non-biodegradable'
Misunderstanding the causes and effects of pollution
Overlooking the significance of biodiversity
Neglecting the impact of climate change on ecosystems
FAQs
Question: What are some important Environment MCQ questions I should focus on?Answer: Focus on questions related to pollution types, conservation methods, and ecological relationships for a well-rounded understanding.
Question: How can I improve my performance in Environment objective questions?Answer: Regular practice of MCQs and reviewing key concepts will significantly enhance your performance.
Start solving practice MCQs today to test your understanding of the environment and boost your exam readiness. Remember, consistent practice is the key to success!
Q. A river carries 500 cubic meters of water per second. How much water does it carry in an hour?
A.
1800000 cubic meters
B.
1500000 cubic meters
C.
1200000 cubic meters
D.
2000000 cubic meters
Show solution
Solution
500 m³/s * 3600 s = 1800000 cubic meters
Correct Answer:
A
— 1800000 cubic meters
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Q. A river flows at a speed of 2 m/s. How far will it flow in 3 hours?
A.
21600 m
B.
7200 m
C.
10800 m
D.
14400 m
Show solution
Solution
2 m/s * 3600 seconds/hour * 3 hours = 21600 m
Correct Answer:
A
— 21600 m
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Q. A river's pollution level is measured at 80 ppm (parts per million). If the river has 2000 liters of water, how many grams of pollutants are present?
A.
160 grams
B.
180 grams
C.
200 grams
D.
220 grams
Show solution
Solution
80 ppm means 80 mg/L. 2000 L * 80 mg/L = 160000 mg = 160 grams
Correct Answer:
A
— 160 grams
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Q. A solar panel generates 300 watts of power per hour. How much power will it generate in 5 hours?
A.
1200 watts
B.
1500 watts
C.
1800 watts
D.
2000 watts
Show solution
Solution
Power generated = 300 watts/hour * 5 hours = 1500 watts
Correct Answer:
C
— 1800 watts
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Q. A study shows that 10% of the 800 species in a rainforest are endemic. How many endemic species are there?
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Solution
10% of 800 is 80, so there are 80 endemic species.
Correct Answer:
B
— 80
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Q. A water treatment plant can purify 5000 liters of water in 2 hours. How many liters can it purify in 5 hours?
A.
12500 liters
B.
10000 liters
C.
15000 liters
D.
20000 liters
Show solution
Solution
Purification rate = 5000 liters/2 hours = 2500 liters/hour. In 5 hours: 2500 liters/hour * 5 hours = 12500 liters
Correct Answer:
B
— 10000 liters
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Q. A water treatment plant can purify 5000 liters of water in an hour. How much water can it purify in 8 hours?
A.
30000 liters
B.
40000 liters
C.
50000 liters
D.
60000 liters
Show solution
Solution
Water purified = 5000 liters/hour * 8 hours = 40000 liters
Correct Answer:
A
— 30000 liters
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Q. A wildlife reserve has 1200 animals, and 25% of them are herbivores. How many herbivores are there in the reserve?
A.
200
B.
300
C.
400
D.
500
Show solution
Solution
1200 animals * 25% = 300 herbivores.
Correct Answer:
B
— 300
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Q. A wildlife reserve has 1200 animals, and 30% are herbivores. How many herbivores are there in the reserve?
A.
240
B.
360
C.
480
D.
600
Show solution
Solution
1200 animals * 30% = 360 herbivores.
Correct Answer:
B
— 360
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Q. A wildlife reserve has 1200 animals, and the ratio of herbivores to carnivores is 4:1. How many carnivores are there?
A.
200
B.
240
C.
300
D.
400
Show solution
Solution
Total parts = 4 + 1 = 5. Each part = 1200 / 5 = 240. Carnivores = 240 / 4 = 240.
Correct Answer:
A
— 200
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Q. A wildlife reserve has 250 animals, and 40% of them are mammals. How many mammals are in the reserve?
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Solution
40% of 250 is 100, so there are 100 mammals.
Correct Answer:
A
— 100
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Q. A wildlife reserve has 300 animals, and 25% of them are herbivores. How many herbivores are there in the reserve?
A.
50
B.
75
C.
100
D.
125
Show solution
Solution
25% of 300 = 0.25 * 300 = 75 herbivores.
Correct Answer:
B
— 75
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Q. A wildlife reserve has 60% of its area as forest and the rest as grassland. If the total area is 300 hectares, how many hectares are grassland?
A.
120 hectares
B.
140 hectares
C.
160 hectares
D.
180 hectares
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Solution
40% of 300 hectares = 0.40 * 300 = 120 hectares of grassland.
Correct Answer:
B
— 140 hectares
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Q. A wind turbine generates 2.5 MW of power. How much power does it generate in 24 hours?
A.
50 MWh
B.
60 MWh
C.
70 MWh
D.
80 MWh
Show solution
Solution
2.5 MW * 24 hours = 60 MWh
Correct Answer:
A
— 50 MWh
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Q. A wind turbine generates 2.5 MW of power. How much power will it generate in 24 hours?
A.
60000 MWh
B.
48000 MWh
C.
72000 MWh
D.
50000 MWh
Show solution
Solution
2.5 MW * 24 hours = 60 MWh
Correct Answer:
B
— 48000 MWh
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Q. A wind turbine produces 1.5 MW of energy. How much energy does it produce in 24 hours?
A.
36000 MWh
B.
72000 MWh
C.
48000 MWh
D.
24000 MWh
Show solution
Solution
1.5 MW * 24 hours = 36 MWh
Correct Answer:
D
— 24000 MWh
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Q. A wind turbine produces 2.5 MW of energy. How much energy does it produce in 24 hours?
A.
60000 MWh
B.
48000 MWh
C.
72000 MWh
D.
50000 MWh
Show solution
Solution
2.5 MW * 24 hours = 60 MWh
Correct Answer:
B
— 48000 MWh
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Q. If a certain ecosystem has a biodiversity index of 0.8 and the maximum possible index is 1.0, what percentage of biodiversity is being utilized?
A.
70%
B.
80%
C.
90%
D.
100%
Show solution
Solution
(0.8 / 1.0) * 100 = 80% of biodiversity utilized.
Correct Answer:
B
— 80%
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Q. If a certain ecosystem loses 10% of its species each year, how many species will remain after 2 years if it starts with 200 species?
A.
160
B.
180
C.
190
D.
200
Show solution
Solution
After 1 year: 200 - (10% of 200) = 180. After 2 years: 180 - (10% of 180) = 162.
Correct Answer:
A
— 160
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Q. If a certain habitat can support 1500 animals and currently has 1200, what is the surplus capacity of the habitat?
A.
200
B.
300
C.
400
D.
500
Show solution
Solution
1500 - 1200 = 300 surplus capacity.
Correct Answer:
B
— 300
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Q. If a certain plant species can grow in 5 different types of soil, and each type of soil can support 10 plants, how many plants can be supported in total?
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Solution
5 types of soil * 10 plants/type = 50 plants.
Correct Answer:
C
— 50
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Q. If a city recycles 25% of its waste and produces 800 tons of waste, how much waste is recycled?
A.
200 tons
B.
150 tons
C.
250 tons
D.
300 tons
Show solution
Solution
Recycled waste = 25% of 800 tons = 0.25 * 800 = 200 tons
Correct Answer:
A
— 200 tons
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Q. If a conservation area is 500 hectares and 20% of it is designated for wildlife protection, how many hectares are protected?
A.
50 hectares
B.
100 hectares
C.
150 hectares
D.
200 hectares
Show solution
Solution
20% of 500 hectares = 0.20 * 500 = 100 hectares.
Correct Answer:
D
— 200 hectares
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Q. If a conservation area is 500 hectares and 30% of it is designated for wildlife protection, how many hectares are protected?
A.
100 hectares
B.
150 hectares
C.
200 hectares
D.
250 hectares
Show solution
Solution
30% of 500 hectares = 0.30 * 500 = 150 hectares.
Correct Answer:
C
— 200 hectares
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Q. If a conservation program costs $150,000 to protect 1500 acres of land, what is the cost per acre?
A.
$50
B.
$100
C.
$150
D.
$200
Show solution
Solution
$150,000 / 1500 acres = $100 per acre.
Correct Answer:
B
— $100
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Q. If a conservation program costs $200,000 and is expected to save 500 endangered species, what is the cost per species saved?
A.
$200
B.
$300
C.
$400
D.
$500
Show solution
Solution
$200,000 / 500 species = $400 per species.
Correct Answer:
A
— $200
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Q. If a conservation program costs $200,000 to protect 500 acres of land, what is the cost per acre?
A.
$200
B.
$300
C.
$400
D.
$500
Show solution
Solution
$200,000 / 500 acres = $400 per acre.
Correct Answer:
A
— $200
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Q. If a coral reef can support 50 species of fish per square kilometer, how many species can be supported in a reef that is 5 square kilometers?
A.
200
B.
250
C.
300
D.
350
Show solution
Solution
50 species/km² * 5 km² = 250 species.
Correct Answer:
C
— 300
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Q. If a coral reef ecosystem can support 150 species of fish and 20% of these species are endangered, how many species are endangered?
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Solution
20% of 150 = 0.20 * 150 = 30 species are endangered.
Correct Answer:
B
— 25
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Q. If a coral reef ecosystem covers 1500 square kilometers and 20% of it is damaged, how many square kilometers are still healthy?
A.
1200 km²
B.
1300 km²
C.
1400 km²
D.
1500 km²
Show solution
Solution
1500 km² * 0.80 = 1200 km² are still healthy.
Correct Answer:
B
— 1300 km²
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