Environmental Science MCQ (Multiple Choice Question) - Schoolingaxis.com

Environmental Science MCQ (Multiple Choice Question)

 Que- The controversial dam across the river Narmada? 

a. Sardar Sarovar  

b. Hirakud  

c. Bhakranangal  

d. Sutlej. 

Answer- Sardar Sarovar  

Explanation-  The Sardar Sarovar Dam is a gravity dam on the Narmada river near Navagam, Gujarat in India. Four Indian states, Gujarat, Madhya Pradesh, Maharastra and Rajasthan, receive water and electricity supplied from the dam. The foundation stone of the project was laid out by Prime Minister Jawaharlal Nehru on 5 April 1961.                     

Que- Snow leopard is found in which National Park? 

a. Kaziranga  

b. The Great Himalayan  

c. Bharatpur  

d. Nagarhole 

Answer- The Great Himalayan  

Explanation-  The park is home to a number of species of endangered mammals, including the snow leopard. Hemis National Park is India's protected area inside the Palearctic ecozone, outside the Changthang Wildlife Sanctuary northeast of Hemis, and the proposed Tso Lhamo Cold Desert Conservation Area in North Sikkim.                     

Que- The place where the worst nuclear disaster took place? 

a. Washington  

b. Chernobyl  

c. Bhopal  

d. Japan 

Answer- Chernobyl  

Explanation-  The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 nuclear reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian Soviet Socialist Republic.[1][2] It is considered the worst nuclear disaster in history and is one of only two nuclear energy disasters rated at seven—the maximum severity—on the International Nuclear Event Scale, the other being the 2011 Fukushima Daiichi nuclear disaster in Japan.                     

Que- The phenomenon of accumulation of non-biodegradable pesticides in human beings 

a. Biomagnification  

b. Bioaccumulation  

c. Biodegradation  

d. Bioremediation 

Answer- Biomagnification  

Explanation-  Higher the trophic level an organism occupies in the food chain higher will be the accumulation of non-biodegradable pesticide residues. This phenomenon is called as biomagnification.                     

Que- The main energy source for the environment is ________ 

a. Solar energy 

b. Chemical energy 

c. Bioelectric energy 

d. Electrical energy 

Answer- Solar energy 

Explanation-  The main energy source for the environment is Solar energy. Solar power harvests the energy of the sun through using collector panels to create conditions that can then be turned into a kind of power.                      

Que- What is deep ecology? 

a. Protecting nature for its own sake  

b. Ecology of deep sea 

c. Ecology of forest  

d. Ecology of caves 

Answer- Protecting nature for its own sake  

Explanation-  Deep ecology is an ecological and environmental philosophy promoting the inherent worth of living beings regardless of their instrumental utility to human needs, plus a restructuring of modern human societies in accordance with such ideas.                     

Que- Red data book contains data of 

a. all plant species 

b. all animal species 

c. economically important species 

d. threatened species 

Answer- threatened species 

Explanation-  Red Data Book is a state document established for documenting rare and endangered species of animals, plants, and fungi, as well as some local subspecies that exist within the territory. The Red Data Book contains the complete list of threatened species.                     

Que- A group of individuals of a plant or animal species, inhabiting a given area is called 

a. Biome 

b. Population 

c. Ecosystem 

d. Community 

Answer- Population 

Explanation-  Group of individuals of a plant or animal species inhabiting a given area or group of individuals of a species.                     

Que- ________ is the degradation of land in arid, semi-arid and dry sub-humid areas. 

a. Land fertility 

b. Desertification 

c. Ecosystem 

d. Vegetation 

Answer- Desertification 

Explanation-  It states that desertification means “land degradation in arid, semi-arid and dry sub-humid areas resulting from various factors, including climatic variations and human activities”.                     

Que- Lotic ecosystem refers to 

a. Static water system  

b. Ecosystem of flowing water  

c. Ecosystem of estuaries  

d. Deep marine water system 

Answer- Ecosystem of flowing water  

Explanation-  Lotic ecosystems can be contrasted with lentic ecosystems, which involve relatively still terrestrial waters such as lakes, ponds, and wetlands. Together, these two ecosystems form the more general study area of freshwater or aquatic ecology.                     

Que- Nitrogen gas returns to the atmosphere by the action of 

a. Nitrogen fixing bacteria  

b. Denitrifying bacteria  

c. Nitrifying bacteria  

d. Nitrate fertilizers 

Answer- Denitrifying bacteria  

Explanation-  Nitrogen gas returns to the atmosphere by the action of denitrifying bacteria.                     

Que- The most abundant gases in the earth's atmosphere by volume are: 

a. Carbon dioxide and nitrogen 

b. Oxygen and water vapor 

c. Nitrogen and oxygen 

d. Oxygen and helium 

Answer- Nitrogen and oxygen 

Explanation-  The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.                     

Que- Cigarette smoking exposes one to __________ 

a. Sulphur dioxide  

b. Carbon dioxide  

c. Nitrogen peroxide  

d. Carbon monoxide 

Answer- Carbon monoxide 

Explanation-  Cigarette smoking exposes one to carbon monoxide.                     

Que- Of the gases listed below, which is not believed to be responsible for enhancing the earth's greenhouse effect? 

a. Chlorofluorocarbons (CFCs) 

b. Molecular oxygen (O2) 

c. Nitrous oxide (N2O) 

d. Carbon dioxide (CO2) 

Answer- Molecular oxygen (O2) 

Explanation-  Molecular oxygen (O2) is not believed to be responsible for enhancing the earth's greenhouse effect.                     

Que- The thickness of ozone layer is measured in  

a. Mm 

b. Du 

c. Nm 

d. Hg  

Answer- Du 

Explanation-  A dobson unit is the most basic measure used in ozone research. One Dobson Unit (DU) is defined to be 0.01 mm thickness at STP (standard temperature and pressure). Ozone layer thickness is expressed in terms of Dobson units, which measure what its physical thickness would be if compressed in the Earth's atmosphere.                     

Que- As the difference between the air temperature and the dew point increases, the relative humidity: 

a. Increases 

b. Decreases 

c. Remains constant at a value less than 100% 

d. Remains constant and equal to 100% 

Answer- Decreases 

Explanation-  When the air temperature is equal to the dew point temperature, the air is at the saturation point and the relative humidity is 100%. The greater the difference between air temperature and dewpoint, the lower is the relative humidity.                     

Que- Biodiversity 

a. Increases towards the equator 

b. Decreases towards the equator 

c. Remains same throughout the planet 

d. Has no effect on change in latitude 

Answer- Increases towards the equator 

Explanation-  Biodiversity increases towards the equator.                     

Que- Herpetology is a branch of Science which deals with 

a. Aves  

b. Mammals  

c. Reptiles  

d. Fishes 

Answer- Reptiles  

Explanation-  Herpetology is the branch of zoology which deals with the study of reptiles and amphibians such as snakes, turtles, and iguanas. It deals with their behaviors, geographic ranges, physiologies, development, genetics, and more.                     

Que- The amount of oil that may become available for use is called oil   

a. Reserves 

b. Reservoirs 

c. Resources 

d. Traps  

Answer- Resources 

Explanation-  The amount of oil that may become available for use is called oil resources.                     

Que- What is the name of the action plan for sustainable development in the Twenty first century framed in the Rio Declaration on Environment & Development (1992)? 

a. Action 21  

b. Agenda 21  

c. Rio 21  

d. Declaration 21 

Answer- Agenda 21  

Explanation-  Agenda 21 is a non-binding action plan of the United Nations with regard to sustainable development. It is a product of the Earth Summit (UN Conference on Environment and Development) held in Rio de Janeiro, Brazil, in 1992.                     

Que- Gharial is a 

a. Crocodile  

b. Cobra  

c. Tortoise  

d. Frog 

Answer- Crocodile  

Explanation-  The gharial (Gavialis gangeticus), also known as the gavial or the fish-eating crocodile, is a crocodilian in the family Gavialidae and among the longest of all living crocodilians.                     

Que- At what time during a 24-hour day would a radiation temperature inversion best be developed? 

a. At sunset 

b. Near sunrise 

c. Toward the end of the morning 

d. Between 2 and 5 pm when the air temperature reaches a maximum 

Answer- Near sunrise 

Explanation-  Near sunrise a radiation temperature inversion best be developed.                     

Que- Animal dung is  __________ waste. 

a. Biodegradable 

b. Non biodegradable 

c. Toxic 

d. Hazardous 

Answer- Biodegradable 

Explanation-  Animal dung is biodegradable waste. Animal dung contains hydrocarbons, which can be broken down into simpler organic molecules, such as methane, hydrogen, water and oxygen.                     

Que- Normally rain water is slightly    

a. Pure 

b. Acidic 

c. Toxic 

d. Oxidize 

Answer- Acidic 

Explanation-  Normal "  rainfall is slightly acidic because of the presence of dissolved carbonic acid.                     

Que- _________ causes loss of water because of seepage of water into the soil. 

a. Evaporation 

b. Percolation 

c. Transpiration 

d. Infiltration  

Answer- Percolation 

Explanation-  Percolation causes loss of water because of seepage of water into the soil.                     

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