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NEET • BIOLOGY • ENVIRONMENTAL ISSUES
Environmental issues practice · Easy
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31
Easy
31 of 82
Understanding
+4 | -1
Earth’s climate
View answer and explanation
Correct option: B
Is changing as a result of natural and human processes
Option B (Is changing as a result of natural and human processes) is correct because Earth's climate is influenced by both natural variations and human activities.
32
Easy
32 of 82
Remembering
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…….. is an undesirable change in physical, chemical or biological characteristics of air, land, water or soil
View answer and explanation
Correct option: A
Pollution
Option A (Pollution) is correct because pollution is defined as an undesirable change in the physical, chemical, or biological characteristics of the environment.
33
Easy
33 of 82
Remembering
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In which state of India, Ecosave toilets are not found?
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Correct option: B
Delhi
Option B is correct because Ecosave toilets are primarily found in Kerala and Sri Lanka, focusing on ecological sanitation, and are not typically implemented in Delhi.
34
Easy
34 of 82
Remembering
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In the town of Arcata situated on northern coast of …A… , an integrated waste water treatment process was developed with the help of biologists from …B… . Here A and B refers to
View answer and explanation
Correct option: B
A-California; B-Humboldt State University
Option B (A-California; B-Humboldt State University) is correct because Arcata is in California, and the project involved Humboldt State University biologists.
35
Easy
35 of 82
Remembering
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Which of the following is not a green house gas?
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Correct option: D
Oxygen
Option D (Oxygen) is correct because oxygen is not a greenhouse gas; it does not trap heat in the atmosphere.
36
Easy
36 of 82
Remembering
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‘Bad’ ozone is formed in
View answer and explanation
Correct option: D
Troposphere
Option D (Troposphere) is correct because 'bad' ozone, which is harmful to human health and the environment, is formed at ground level in the troposphere.
37
Easy
37 of 82
Understanding
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Assertion : Water pollutants are measured by
BOD.
Reason : If BOD is more, the water is polluted.
BOD.
Reason : If BOD is more, the water is polluted.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because BOD is indeed used to measure water pollutants, and a higher BOD indicates more pollution due to increased organic matter.
38
Easy
38 of 82
Understanding
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Green house effect with respect to global climate refers to
View answer and explanation
Correct option: B
Warming effect
Option B (Warming effect) is correct because the greenhouse effect traps heat in the atmosphere, leading to global warming.
39
Easy
39 of 82
Remembering
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Which element is caused of itai-itai disease?
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Correct option: C
Cd
Option C (Cd) is correct because Itai-Itai disease is caused by cadmium poisoning.
40
Easy
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Understanding
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A pollutant can best defined as it
View answer and explanation
Correct option: B
Changes homeostasis of environment
Option B (Changes homeostasis of environment) is correct because pollutants disrupt the natural balance of the environment.
41
Easy
41 of 82
Understanding
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The amount of biodegradable organic matter in sewage water can be estimated by measuring
View answer and explanation
Correct option: B
Biochemical oxygen demand
Option B (Biochemical oxygen demand) is correct because BOD specifically measures the amount of oxygen required by microorganisms to decompose biodegradable organic matter in water.
42
Easy
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Understanding
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Eutrophication results in reduction of
View answer and explanation
Correct option: B
Dissolved oxygen
Option B (Dissolved oxygen) is correct because eutrophication leads to excessive algal growth, which consumes dissolved oxygen and causes hypoxia or anoxia.
43
Easy
43 of 82
Understanding
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Which of the following is crucial to disposal of hospital waste?
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Correct option: C
Use of incinerators
Option C (Use of incinerators) is correct because incinerators are crucial for safely disposing of hospital waste by burning it at high temperatures to destroy pathogens and reduce volume.
44
Easy
44 of 82
Remembering
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Which are sensitive to pollution?
View answer and explanation
Correct option: C
Lichen
Option C (Lichen) is correct because lichens are highly sensitive to pollution and used as bioindicators.
45
Easy
45 of 82
Understanding
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Which one among the following is likely to have the highest level of DDT deposition in its body?
View answer and explanation
Correct option: B
Sea gull
Option B (Sea gull) is correct because DDT, being a persistent organic pollutant, biomagnifies up the food chain, resulting in the highest concentration in top predators like sea gulls.
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46
Easy
46 of 82
Understanding
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The main cause of pollution is metrocities is
View answer and explanation
Correct option: A
Burning of fossil fuels
Option A (Burning of fossil fuels) is correct because it is a major contributor to air pollution in metropolises.
47
Easy
47 of 82
Remembering
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Scrubber is used to remove gases like
View answer and explanation
Correct option: B
Option B is correct because scrubbers are specifically designed to remove acidic gases like sulfur dioxide (SO2) from industrial emissions.
48
Easy
48 of 82
Remembering
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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
View answer and explanation
Correct option: B
Ozone
Option B (Ozone) is correct because ozone depletion leads to increased UV radiation reaching the Earth's surface, which can increase the risk of skin cancer.
49
Easy
49 of 82
Remembering
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The effect of hydrogen sulphide on man leads to which of the following diseases?
View answer and explanation
Correct option: A
Paralysis
Option A (Paralysis) is correct because hydrogen sulphide (H2S) exposure can lead to paralysis due to its neurotoxic effects.
50
Easy
50 of 82
Understanding
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Carbon monoxide is a pollutant because it
View answer and explanation
Correct option: C
Reacts with haemoglobin
Option C (Reacts with haemoglobin) is correct because carbon monoxide (CO) is a pollutant that binds strongly to hemoglobin, preventing oxygen transport in the blood.
51
Easy
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Remembering
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Major cause of air pollution in big cities is
View answer and explanation
Correct option: D
Automobile exhaust
Option D (Automobile exhaust) is correct because automobile exhaust is a significant contributor to air pollution in big cities due to the high volume of vehicles and their emissions.
52
Easy
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Understanding
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Which of the following practices has caused maximum damage to the biodiversity of Indian forests?
View answer and explanation
Correct option: D
Jhoom cultivation
The correct answer is D (Jhoom cultivation) because it involves slash-and-burn agriculture, which leads to significant deforestation and biodiversity loss.
53
Easy
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Understanding
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Biochemical Oxygen Demand (BOD) in a river water
View answer and explanation
Correct option: D
Increase when sewage gets mixed with river water
Option D (Increase when sewage gets mixed with river water) is correct because sewage contains organic matter that increases the demand for oxygen by microorganisms.
54
Easy
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Understanding
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Given below are two statements
Statement I: The degradation of natural resources can occur, not just by the action of pollutants but also by improper resources utilisation practices.
Statement II: Deforestation is the conversion of forested areas to non-forested ones.
Choose the correct answer from the option given below:
Statement I: The degradation of natural resources can occur, not just by the action of pollutants but also by improper resources utilisation practices.
Statement II: Deforestation is the conversion of forested areas to non-forested ones.
Choose the correct answer from the option given below:
View answer and explanation
Correct option: D
Both Statement I and Statement II are correct
The correct answer is D (Both Statement I and Statement II are correct) because both statements accurately describe the degradation of natural resources and deforestation.
55
Easy
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Remembering
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What was the aim of Chipko movement?
View answer and explanation
Correct option: D
Forest (plant)conservation
The correct answer is D (Forest (plant)conservation) because the Chipko movement aimed to protect forests by preventing tree cutting.
56
Easy
56 of 82
Remembering
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Montreal protocol was signed is 1987 but became effective in
View answer and explanation
Correct option: A
1989
The correct answer is A (1989) because the Montreal Protocol, although signed in 1987, became effective in 1989.
57
Easy
57 of 82
Remembering
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Ozone hole is largest over
View answer and explanation
Correct option: A
Antarctica
Option A (Antarctica) is correct because the ozone hole is most prominent and largest over the Antarctic region due to specific atmospheric and chemical conditions.
58
Easy
58 of 82
Remembering
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Irreparable computers and other electronic goods are known as
View answer and explanation
Correct option: A
Electronic waste
Option A (Electronic waste) is correct because irreparable computers and other electronic goods are commonly referred to as electronic waste.
59
Easy
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Understanding
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In which one of the following, the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
View answer and explanation
Correct option: B
SE < PE < S < DE
Option A (SE < S < PE < DE) is correct because sugar mill effluent (SE) generally has the lowest BOD, followed by sewage (S), paper mill effluent (PE), and distillery effluent (DE) which has the highest BOD.
60
Easy
60 of 82
Understanding
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If a pond food chain gets polluted by DDT, the tissue concentration of DDT would be highest in
View answer and explanation
Correct option: D
Bird feeding on fish
Option D (Bird feeding on fish) is correct because DDT biomagnifies up the food chain, resulting in the highest concentration in top predators like birds that consume fish.
Revision notes and key takeaways
Review ENVIRONMENTAL ISSUES in your textbook or class notes, then use this set to check your understanding.
Showing 31-60 of 82 questions