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How many questions come from environmental issues in NEET?
The number of questions related to environmental issues in NEET can vary from year to year. The exam primarily focuses on Biology, and questions related to environmental issues may be part of the Ecology and Environment section. It's essential for NEET aspirants to thoroughly study this section, which includes topics like biodiversity, ecosystem dynamics, and environmental conservation
Which class is environmental issues in NCERT?
Environmental issues are primarily addressed in the Class 12 Biology NCERT textbook, in the unit titled "Biology in Human Welfare." This section discusses various environmental concerns, their impact on human life, and measures for conservation.
What are the 5 major environmental problems, explain?
The five major environmental problems are:
Climate Change: Refers to long-term changes in temperature, precipitation, and other atmospheric conditions. It is largely driven by human activities, such as the burning of fossil fuels, deforestation, and industrial processes.
Deforestation: The large-scale removal of forests, leading to habitat loss, disruption of ecosystems, and a decrease in biodiversity. Deforestation is often driven by agriculture, logging, and urbanization.
Air Pollution: The introduction of harmful substances into the air, such as pollutants from vehicles, industrial processes, and the burning of fossil fuels. Air pollution can have severe health and environmental impacts.
Water Pollution: Contamination of water bodies (rivers, lakes, oceans) by pollutants like chemicals, heavy metals, and pathogens. Water pollution can harm aquatic life and pose risks to human health.
Loss of Biodiversity: The ongoing reduction in the variety of plant and animal species in different ecosystems. Human activities, habitat destruction, pollution, and climate change contribute to the loss of biodiversity, which can have cascading effects on ecosystems.
What is the world's biggest environmental problem today?
Identifying the single "biggest" environmental problem is subjective, as various issues are interconnected and have wide-ranging impacts. However climate change is often considered one of the most pressing global environmental challenges. It affects ecosystems, weather patterns, sea levels, and poses risks to human societies worldwide.
What are the 4 causes of water pollution?
The four main causes of water pollution are:
Industrial Discharges: Release of pollutants from industrial processes into water bodies, including chemicals, heavy metals, and toxins.
Agricultural Runoff: The flow of pesticides, fertilizers, and other agricultural chemicals from fields into rivers and lakes, leading to water contamination.
Urban Runoff: Disposal of pollutants into water bodies through stormwater runoff from urban areas, carrying pollutants like oil, heavy metals, and trash.
Wastewater Disposal: Improper disposal of untreated or partially treated sewage and wastewater into rivers and oceans, introducing pathogens and pollutants into aquatic environments.
Environmental Issues NEET MCQ for Biology with Answers
Environmental Issues NEET MCQ: In this article, we will discuss some multiple-choice questions based on these Environmental issues. Solve now.
Krati Saraswat5 Apr, 2024
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Environmental Issues NEET MCQ Introduction
Environmental Issues NEET MCQ:
Ecosystems' regular functioning is disrupted by environmental issues. Furthermore, these problems may be the result of natural processes or human activity (human effect on the environment). When an ecosystem can no longer heal under the current conditions, these problems are deemed critical, and catastrophic when an ecological collapse is predicted.
The practice of defending the environment is known as environmental protection, and it can be carried out on a personal, group, or governmental basis. Environmentalism is a social and environmental movement that uses advocacy, legislation, education, and action to address environmental challenges. Humans' impact on the environment is a persistent, worldwide issue. Marine life is also hampered by water pollution.
These environmental issues may damage the air, water, and soil, hamper ecological balance, and lead to species extinction. In this article, we will discuss some multiple-choice questions based on these Environmental issues.
Q 1. Which of the following best describes environmental chemistry?
Study of chemical interactions that take place in water, air, land, biological ecosystems, and human activities
Study of only chemical processes that take place in biological, terrestrial, aquatic, and atmospheric environments.
Study of only chemical interactions that take place in water, air, and land.
None of the above
Answer-
Option (1) is correct.
Explanation:
Environmental chemistry is the study of chemical processes that take place in water, air, land, and biological environments as well as the effects of human activity on them. The subjects addressed include astrochemistry, atmospheric chemistry, environmental modeling, geochemistry, marine chemistry, and pollution removal.
Q 2. What is the dominating range of light wavelengths in the lower atmosphere?
Less than 100 nm,
Greater than 300 nm,
Between 100 and 300 nm,
All wavelengths are equally present.
Answer-
Option (2) is correct.
Explanation:
Ozone does not often develop at ground level because of the presence of light with wavelengths larger than 300 nm in the lowest layers of the atmosphere. The light with wavelength less than 300nm falls in the ultraviolet category and is often filtered by the ozone layer which is present in the stratosphere.
Q 3. Which of the following pollutant categories best describes cultural eutrophication?
Noise pollution,
Thermal pollution,
Soil pollution,
Water pollution.
Answer-
Option (4) is correct.
Explanation:
Cultural eutrophication is a form of water pollution caused by an abundance of nutrients from household trash, factories, etc. that contaminate lakes, lower oxygen levels, and harm aquatic ecosystems. The process that accelerates natural eutrophication as a result of human activities is known as cultural or anthropogenic eutrophication. As a result of land clearance and urban development, lakes and rivers receive additional nutrients like phosphates and nitrate, which are subsequently provided to coastal estuaries and bays.
Q 4. Which of the following best describes the field of environmental science?
Study of just human-environment interactions
Study of only environment-physical component interactions
Research on how chemical elements interact with the environment
Research on how the environment's physical, chemical, and biological elements interact
Answer-
Option (4) is correct.
Explanation:
Environmental science is the study of how the environment's physical, chemical, and biological elements interact. In order to comprehend human interactions, perspectives, and environmental policy, environmental studies increasingly combine social sciences. Design and technologies for enhancing environmental quality in all areas are the focus of environmental engineering. Environmental scientists work to comprehend the earth's physical, chemical, biological, and geological processes and then use that understanding to comprehend how issues like alternative energy sources, pollution control and mitigation, resource management, and the effects of global warming and climate change affect and influence the natural systems and processes of the earth.
Q 5. What one of the following is true about water vapor?
Water vapor is the liquid phase of water
The gaseous phase of water.
The solid phase of water
All the previously mentioned
Answer-
Option (2) is correct.
Explanation:
Aqueous vapor or water vapor are both terms for the gaseous state of water. It is a specific kind of water condition found in the hydrosphere. In addition to the sublimation of ice, the boiling or evaporation of liquid water can also produce water vapor. Water vapor is translucent, like most other components of the atmosphere.
Q 6. What is the procedure for clearing a region of its forest cover known?
Forestry conversion;
Deforestation;
Pollution;
The greenhouse impact.
Answer-
Option (2) is correct.
Explanation:
Deforestation is the process of removing a forest cover from a region and converting a forest area to a non-forested one. Due to this, the number of tropical forests has decreased by around 40% compared to just 1% in the temperate zone. This removal of forest cover is very harmful to the environment because it causes soil erosion, changes weather patterns, and damages the air and water balance and ecological growth.
Q 7. Which of the following processes is used by farmers to clear forests of trees and burn plant debris?
Room culture,
Jhum cultivation,
Crop cultivation,
Reforestation.
Answer-
Option (2) is correct.
Explanation:
Jhum cultivation is the method of cultivating crops by removing trees and other plant life from the forest and burning the leftovers for agriculture. It is sometimes referred to as "slash-and-burn agriculture" and is mostly used in India's northeastern states.
Q 8. Which honor is bestowed on rural dwellers or groups that have made noteworthy contributions and demonstrated a commitment to safeguarding wildlife across the nation?
The Arjuna Award,
The Padma Bhushan Award,
The Rajiv Gandhi Wildlife Conservation Award,
The Amrita Devi Bishnoi Wildlife Protection Award.
Answer-
Option (4) is correct.
Explanation:
It is given to people or communities from rural regions who have displayed great bravery, made a substantial contribution, and dedicated themselves to the conservation of wildlife nationwide. A financial award of Rs. 1 lakh is further awarded to that person or community.
Q 9. What is the full form of DDT?
Dichlorodiphenyltrichloroethane,
Diphenyldichlorotrichloroethane,
Dichlorodiphenyltriphenylethane,
Dichlorodiphenyltrichloroethane.
Answer-
Option (2) is correct.
Explanation:
DDT is officially known as dichlorodiphenyltrichloroethane. It is a crystalline chemical substance that is tasteless, practically odorless, and colorless. It was first created as an insecticide, but its usage was later discontinued due to its negative effects on the environment and living things. High quantities of it can make people throw up, have seizures, or tremble.
Q 10. Which of the following doesn't makeup DDT?
Carbon,
Fluorine,
Chlorine,
Hydrogen.
Answer-
Option(b) is correct. Fluorine is not a component of DDT. Dichlorodiphenyltrichloroethane, often known as DDT, has the chemical formulaC14H9Cl5. Therefore, as is clear from its chemical composition, DDT doesn't include fluorine. About 15% of its makeup is made up of contaminants, which are present in modest amounts. Its para isomer, which makes up 77% of the material, is the main ingredient.
Q 11. Which of the following is a degradable pollutant?
Chemicals,
Metals,
Vegetable Wastes,
Plastic.
Answer-
Option (3) is correct.
Explanation:
Vegetable waste is a biodegradable contaminant. They can be quickly degraded by microorganisms through natural processes since they are organic. Since they are inorganic and will slowly disintegrate over time, chemicals, metals, and polymers will stay in the environment for many years without changing.
Q 12. Which of the following has not become a global concern since the development of environmental biotechnology?
Marine pollution
Oil spills
Topsoil erosion
Global warming
Answer-
Option (3) is correct.
Explanation:
While topsoil erosion is categorized as a national issue because the national government would be involved in resolving it, global warming, marine pollution, oil spills, air pollution, and the energy crisis have emerged as international issues that are receiving attention due to the advent of environmental biotechnology.
Q 13. Which of the following does not contribute to the decline or extinction of species?
Land conversion,
Unsustainable resource extraction,
The introduction of foreign species,
Reforestation.
Answer-
Option (4) is correct.
Explanation:
The extinction or decline of species is primarily brought on by a variety of ecosystem-unfriendly activities like land conversion, unsustainable resource extraction, and the introduction of exotic species, which changes the world's biodiversity. In contrast, reforestation results in the planting of plants, which helps to restore biodiversity.
Q 14. The main factor contributing to environmental degradation is ____.
Bio-magnification,
Nitrogen deposition,
Quorum quenching,
Lyophilization.
Answer-
Option (2) is correct.
Explanation:
The main contributor to environmental deterioration is nitrogen deposition because it causes species extinctions and changes in plant communities in the soil and water. Contrarily, quorum quenching inhibits quorum sensing, lyophilization is the process of freeze drying, and bio-magnification causes harmful compounds to be deposited in the food chain.
Q 15. Which of the following techniques for getting rid of solid waste releases organic contaminants into the environment?
Landfilling;
Incineration;
Phytoremediation;
Biological treatment.
Answer-
Option (2) is correct.
Explanation:
While landfilling doesn't directly release toxins into its immediate environment, phytoremediation is a method of bioremediation using plants. Biological treatment also includes microbes. Incinerating solid waste in an incinerator results in the release of dioxins into the environment, which again contributes to environmental pollution.
