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NEET • BIOLOGY • ENVIRONMENTAL ISSUES
Environmental issues practice · Mixed difficulty
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151
Hard
151 of 245
Remembering
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Polluted water can be purified by using
View answer and explanation
Correct option: A
Microorganisms
Option A (Microorganisms) is correct because microorganisms are used in bioremediation processes to break down pollutants in water.
152
Hard
152 of 245
Understanding
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The EI Nino effect is related to
View answer and explanation
Correct option: A
Odd climatic changes due to rise in temperature
Option A (Odd climatic changes due to rise in temperature) is correct because El Nino is a climate pattern associated with temperature increases.
153
Medium
153 of 245
Remembering
+4 | -1
To remove which pollutants, enzymatic filters are used?
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Correct option: A
Hydrocarbons
Option A is correct because enzymatic filters are specifically designed to remove hydrocarbons by using enzymes to break them down into less harmful substances.
154
Hard
154 of 245
Understanding
+4 | -1
Positive pollution of soil is due to:
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Correct option: D
All of the above
Option D is correct because positive pollution of soil encompasses any factor that reduces soil productivity or introduces harmful waste, including excessive fertilizer use.
155
Medium
155 of 245
Remembering
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Amrita Devi Bishnoi wildlife protection award is given to the individuals or communities from
View answer and explanation
Correct option: A
Rural areas
The correct answer is A (Rural areas) because the Amrita Devi Bishnoi wildlife protection award is given to individuals or communities from rural areas for their contributions to wildlife conservation.
156
Easy
156 of 245
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.
157
Medium
157 of 245
Remembering
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Which method is used to remove particulate matter present in exhaust of thermal power plant?
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Correct option: C
Electrostatic precipitator
Option C (Electrostatic precipitator) is correct because electrostatic precipitators are commonly used to remove particulate matter from the exhaust of thermal power plants.
158
Easy
158 of 245
Remembering
+4 | -1
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.
159
Medium
159 of 245
Remembering
+4 | -1
In India, Jhum cultivation is practiced mainly in
View answer and explanation
Correct option: A
North eastern states of India
The correct answer is A (North eastern states of India) because Jhum cultivation is primarily practiced in the northeastern region of India.
160
Easy
160 of 245
Remembering
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The effect of hydrogen sulphide on man leads to which of the following diseases?
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Correct option: A
Paralysis
Option A (Paralysis) is correct because hydrogen sulphide (H2S) exposure can lead to paralysis due to its neurotoxic effects.
161
Medium
161 of 245
Remembering
+4 | -1
Irrepairable goods, computers and other electronic devices are known as
View answer and explanation
Correct option: B
e-wastes
Option B (e-wastes) is correct because irreparable goods, computers, and other electronic devices are commonly referred to as electronic waste or e-waste.
162
Easy
162 of 245
Understanding
+4 | -1
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.
163
Easy
163 of 245
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.
164
Medium
164 of 245
Understanding
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What is soil erosion?
View answer and explanation
Correct option: B
A harmful process that involves the removal and transport of soil by human activities, wind and water
Option B (A harmful process that involves the removal and transport of soil by human activities, wind and water) is correct because soil erosion is the process by which soil is removed and transported from one location to another by natural forces or human activities.
165
Easy
165 of 245
Understanding
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Which of the following practices has caused maximum damage to the biodiversity of Indian forests?
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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.
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166
Easy
166 of 245
Understanding
+4 | -1
Biochemical Oxygen Demand (BOD) in a river water
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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.
167
Easy
167 of 245
Understanding
+4 | -1
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.
168
Hard
168 of 245
Remembering
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The most adverse effect of radioactive pollutant is
View answer and explanation
Correct option: A
Gene mutation
Option A (Gene mutation) is correct because radioactive pollutants are known to cause genetic damage.
169
Easy
169 of 245
Remembering
+4 | -1
What was the aim of Chipko movement?
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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.
170
Easy
170 of 245
Remembering
+4 | -1
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.
171
Hard
171 of 245
Remembering
+4 | -1
The inorganic compound like sulphate, phosphate etc., are found in
View answer and explanation
Correct option: A
Acid-soluble pool
Option A (Acid-soluble pool) is correct because inorganic compounds like sulfates and phosphates are generally found in the acid-soluble pool during cellular fractionation.
172
Hard
172 of 245
Understanding
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Assertion: There is a sharp decline in dissolved oxygen downstream from the point of sewage discharge.
Reason: Microorganisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen.
Reason: Microorganisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and 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 sewage discharge increases organic matter, which is then decomposed by microorganisms that consume oxygen, leading to a decline in dissolved oxygen.
173
Easy
173 of 245
Remembering
+4 | -1
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.
174
Easy
174 of 245
Remembering
+4 | -1
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.
175
Easy
175 of 245
Understanding
+4 | -1
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.
176
Hard
176 of 245
Remembering
+4 | -1
Which of the following metal pollution causes sterility in human beings?
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Correct option: C
Manganese
Option C (Manganese) is correct because excessive exposure to manganese can cause manganism, a neurological disorder that can lead to sterility in human beings.
177
Medium
177 of 245
Understanding
+4 | -1
Consider the following statements about eutrophication
I. Eutrophication is the natural ageing of a water body by nutrient enrichment
II. The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or accelerated eutrophication
III. The plant nutrients responsible for eutrophication are nitrates and phosphates
IV. Phosphates and nitrates accelerate the growth of algae which utilise oxygen and may deoxygenate the water enough to kill the fish and other aquatic animals
Which of the statements given above are correct?
I. Eutrophication is the natural ageing of a water body by nutrient enrichment
II. The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or accelerated eutrophication
III. The plant nutrients responsible for eutrophication are nitrates and phosphates
IV. Phosphates and nitrates accelerate the growth of algae which utilise oxygen and may deoxygenate the water enough to kill the fish and other aquatic animals
Which of the statements given above are correct?
View answer and explanation
Correct option: D
I, II, III and IV
Option D (I, II, III and IV) is correct because all the statements accurately describe the process and causes of eutrophication.
178
Hard
178 of 245
Understanding
+4 | -1
A pollutant is an agent which causes change in
View answer and explanation
Correct option: C
Geochemical cycles
Option C (Geochemical cycles) is correct because pollutants disrupt the natural cycling of elements and compounds in the environment.
179
Easy
179 of 245
Understanding
+4 | -1
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.
180
Medium
180 of 245
Remembering
+4 | -1
Consider the following statement about polyblend
I. In 1998, Ahmed Khan developed polyblend, a fine powder of recycled modified plastic
II. Polyblend has been mixed with bitumen to lay roads in Bengaluru
III. Polyblend enhances bitumen’s water repellant properties and helps to increase the life of road
Which of the statements given above are correct?
I. In 1998, Ahmed Khan developed polyblend, a fine powder of recycled modified plastic
II. Polyblend has been mixed with bitumen to lay roads in Bengaluru
III. Polyblend enhances bitumen’s water repellant properties and helps to increase the life of road
Which of the statements given above are correct?
View answer and explanation
Correct option: D
I, II and III
Option D (I, II and III) is correct because all the statements accurately describe the development and application of polyblend by Ahmed Khan.
Revision notes and key takeaways
Review ENVIRONMENTAL ISSUES in your textbook or class notes, then use this set to check your understanding.
Showing 151-180 of 245 questions