NEET Biology Environmental Issues MCQs Set D

Question: Which is not an effect of global warming?

• a) Good fungal growth in soil
• b) Poleward shifting of organism
• c) More extreme weather condition
• d) Rise of sea level

Answer: Good fungal growth in soil

Question:

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Consider the following statements and select correct set w.r.t. global warming

(a) El Nino effect
(b) Cooling of stratosphere and earth surface
(c) Shifting of climatic zones
(d) Snow blindness
(e) Inpairment of hearing
(f) Excessive deposition of ice at poles
(g) Rise in sea level
(h) Increase in eutrophication

• a) a, c & g
• b) a, b, c, d, f & h
• c) a, c, d, e, f & g
• d) a, c, e, g & h

Answer: a, c & g

Question: Green house gases are

• a) Absorbers of long-wave radiations from earth
• b) Transparent to both solar radiations and long-wave radiations from earth
• c) Absorbers of solar radiations for warming the atmosphere
• d) Transparent to emissions from earth for passage into outer space

Answer: Absorbers of long-wave radiations from earth

Question: Which of the following conference obtained commitments from different countries for reducing overall green house gas emission at a level 5% below 1990 level by 2008-2012?

• a) Kyoto Protocol, 1997
• b) Montreal Protocol, 1987
• c) Earth Summit, Rio-de-Janeiro, 1992
• d) Helsinki Declaration, 1989

Answer: Kyoto Protocol, 1997

Question: Which one of the following was the objective of signing the ‘Montreal protocol’?

• a) Protection of ozone layer
• b) Control the over use of insecticides
• c) Protection of wild life
• d) Control of noise pollution

Answer: Protection of ozone layer

Question: Prolonged water logging in an agricultural fields is likely to create the problem of

• a) Poor aeration and high salinity
• b) Metal toxicity and proper aeration
• c) Poor aeration and low salinity
• d) Poor aeration and high acidity

Answer: Poor aeration and high salinity

Question:

• a) a(iv), b(iii), c(i), d(ii)
• b) a(i), b(iii), c(iv), d(ii)
• c) a(iv), b(i), c(ii), d(iii)
• d) a(iv), b(iii), c(i), d(ii)

Answer: a(iv), b(iii), c(i), d(ii)

Question: Blue-baby syndrome is due to the

• a) Soil pollution
• b) Thermal pollution
• c) Radioactive pollution
• d) Air pollution

Answer: Soil pollution

Question: Agenda-21 was adopted in

• a) Earth summit
• b) Montreal protocol
• c) Kyoto protocol
• d) Helsinki declaration

Answer: Earth summit

Question: Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of

• a) Oxygen
• b) Food
• c) Light
• d) Essential minerals

Answer:  Oxygen

Question:  Acid rain is caused by increase in the atmospheric concentration of

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Increase in concentration of the toxicant at successive trophic levels is known a

• a) Biomagnification
• b) Biotransformation
• c) Biogeochemical cycling
• d) Biodeterioration

Answer: Biomagnification

Question: The UN conference of Parties on climate change in the year 2012 was held at

• a) Doha
• b) Lima
• c) Durban
• d) Warsaw

Answer: Doha

Question: High value of BOD (Biochemical Oxygen Demand) indicates that

• a) Water is highly polluted
• b) Water is pure
• c) Consumption of organic matter in the water is higher by the microbes
• d) Water is less polluted

Answer:  Water is highly polluted

Question: The UN Conference of Parties on climate change in the year 2011 was held in

• a) South Africa
• b) Peru
• c) Qatar
• d) Poland

Answer: South Africa

Question: Rachel Carson's famous book "Silent Spring" is related to

• a) Pesticide pollution
• b) Population explosion
• c) Ecosystem management
• d) Noise pollution

Answer: Pesticide pollution

Question: A scrubber in the exhaust of a chemical industrial plant removes

• a) Gases like sulphur dioxide
• b) Particulate matter of the size 5 micrometer or above
• c) Gases like ozone and methane
• d) Particulate matter of the size 2.5 micrometer or less

Answer:  Gases like sulphur dioxide

Question: A location with luxuriant growth of lichens on the trees indicates that the

• a) Location is not polluted
• b) Trees are heavily infested
• c) Trees are very healthy
• d) Location is highly polluted

Answer: Location is not polluted

Question: The zone of atomosphere in which the ozone layer is present is called

• a) Stratosphere
• b) Troposphere
• c) Mesophere
• d) Ionosphere

Answer: Stratosphere

Question: Global warming can be controlled by

• a) Reducing deforestation, cutting down use of fossil fuel
• b) Increasing deforestation, reducing efficiency of energy usage
• c) Increasing deforestation , slowing down the growth of human population
• d) Reducing reforestation, increasing the use of fossil fuel

Answer: Reducing deforestation, cutting down use of fossil fuel

Question: The Air Prevention and Control of Pollution Act came into force in

• a) 1981
• b) 1985
• c) 1990
• d) 1975

Answer: 1981

Question: Kyoto Protocol was endorsed at

• a) CoP - 3
• b) CoP - 4
• c) CoP - 6
• d) CoP - 5

Answer: CoP - 3

Question: Which one of the following is a wrong statement?

• a) Ozone in upper part of atmosphere is harmful to animals
• b) Most of the forests have been lost in tropical areas
• c) Eutrophication is a natural phenomenon in freshwater bodies
• d) Greenhouse effect is a natural phenomenon

Answer: Ozone in upper part of atmosphere is harmful to animals

Question: In an area where DDT has been used extensively. the population of birds declined significantly because

• a) Many of the birds eggs laid, did not hatch
• b) Earthworms in the area got eradicated
• c) Cobras were feeding exclusively on birds
• d) Birds stopped laying eggs

Answer: Many of the birds eggs laid, did not hatch

Question: Which one of the following statements is wrong in case of Bhopal tragedy?

• a) Radioactive fall out engulfed Bhopal
• b) Thousands of human beings died
• c) Methyl Isocyanate gas leakage took place
• d) It took place in the night of December 2/3, 1984

Answer: Radioactive fall out engulfed Bhopal

Question: Which one of the following pairs of gases are the major cause of "Greenhouse effect"?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: “Good ozone” is found in the

• a) Stratosphere
• b) Ionosphere
• c) Mesosphere
• d) Troposphere

Answer: Stratosphere

Question: Eutrophication is often seen in

• a) Fresh water lakes
• b) Ocean
• c) Deserts
• d) Mountains

Answer: Fresh water lakes

Question: The two gases making highest relative contribution to the greenhouse gases are

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

More Questions................................................

Question: When domestic sewage mixes with river water

• a) The increased microbial activity uses up dissolved oxygen
• b) The river water is still suitable for drinking as impurities are only about 0.1%
• c) The increased microbial activity releases micronutrients such as iron
• d) Small animals like rats will die after drinking river water

Answer: The increased microbial activity uses up dissolved oxygen

Question: dB is a standard abbreviation used for the quantitative expression of

• a) A particular pollutant
• b) A certain pesticide
• c) The density of bacteria in a medium
• d)  The dominant Bacillus in a culture

Answer:  A particular pollutant

Question: Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by

• a) The Montreal Protocol
• b) The Koyoto Protocol
• c) The Vienna Convention
• d) Rio de Janeiro Conference

Answer: The Montreal Protocol

Question: Steps taken by the Government of India to control air pollution include

• a) Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons
• b) Permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles
• c) Use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks
• d) Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel

Answer: Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

Question: Montreal Protocol aims at

• a) Reduction of ozone depleting substances
• b) Control of water pollution
• c) Biodiversity conservation
• d) Control of CO₂ emission

Answer: Reduction of ozone depleting substances

Question: Biochemical Oxygen Demand (BOD) in a river water:

• a) Increases when sewage gets mixed with river water.
• b) Remains unchanged when algal bloom occurs
• c) Gives a measure of Salmonella in the water.
• d) Has no relationship with concentration of oxygen in the water.

Answer: Increases when sewage gets mixed with river water.

Question: Chipko movement was launched for the protection of

• a) Forests
• b) Livestock
• c) Wet lands
• d) Grasslands

Answer: Forests

Question: DDT residues are rapidly passed through food chain causing biomagnification because DDT is

• a) Lipo soluble
• b) Non-toxic to aquatic animals
• c) Moderately toxic
• d) Water soluble

Answer: Lipo soluble

Question: Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming

• a)  CFCs14%, Methane 20%
• b)

  

• c)

  

• d)

  

Answer: CFCs14%, Methane 20%

Question: World summit on Sustainable Development (2002) was held in

• a) South Africa
• b) Brazil
• c) Sweden
• d) Argentina

Answer: South Africa

Question: According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

• a) 2.5 or less
• b) 1.5 or less
• c) 1.0 or less
• d) 5.2 - 2.5

Answer: 2.5 or less

Question: A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this

(a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity.
(b) The area was sprayed with DDT by an aircraft
(c) The lake water turned green and stinky.
(d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Which two of the above were the main causes of fish mortality in the lake?

• a) a, c
• b) c, d
• c) b, c
• d) a, b

Answer: a, c

Question: 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?

• a) SE < S < PE < DE
• b) SE < PE < S < DE
• c) PE < S < SE < DE
• d) S < DE < PE < SE

Answer: SE < S < PE < DE

Question: In a coal fires power plant electrostatic precipitators are installed to control emission of:

• a) SPM
• b) CO
• c) NO
• d) SO

Answer: SPM

Question: Which one of the following is not a bioindicator of water pollution?

• a) Stone flies
• b) Blood-worms
• c) Sludge-worms
• d) Sewage fungus

Answer: Stone flies

Question: Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

• a) 1987
• b) 1988
• c) 1985
• d) 1986

Answer: 1987

Question: Photochemical smog pollution does not contain

• a) Carbon dioxide
• b) Ozone
• c) Nitrogen dioxide
• d) PAN (Peroxy Acyl Nitrate

Answer:  Carbon dioxide

Question: Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is

• a) < 30 ppm
• b) < 100 ppm
• c) < 10 ppm
• d) < 3.0 ppm

Answer: < 30 ppm

Question: More than 70% of world’s freshwater is contained in

• a) Polar ice
• b) Glaciers and Mountains
• c) Antarctica
• d) Greenland

Answer: Polar ice

Question: Which one of the following pairs is mismatched ?

• a) Solar energy — green house effect
• b) Fossil fuel burning — release of CO₂
• c) Biomass burning — release of CO₂
• d) Nuclear power — radioactive wastes

Answer: Solar energy — green house effect

Question: Nuclear power — radioactive wastes

• a) Kyoto protocol - Climatic change
• b) Basal convention - Biodiversity conservation
• c) Montreal protocol - Global warming
• d) Ramsar convention - Ground water pollution

Answer: Kyoto protocol - Climatic change

Question: Which of the following is not used for disinfection of drinking water ?

• a) Phenyl
• b) Chloramine
• c) Chlorine
• d) Ozone

Answer: Phenyl

Question: Prolonged liberal irrigation of agricultural fields is likely to create the problem of

• a) Salinity
• b) Metal toxicity
• c) Aridity
• d) Acidity

Answer: Salinity

Question: The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by

• a) 200 times
• b) 1000 times
• c) 2 times
• d) 20 times

Answer: 200 times

Question: Which of the following is a secondary pollutant?

• a) PAN
• b) Aerosol
• c) CO
• d) CO₂

Answer: PAN

Question: Which one of the following is not correct as regards the harmful effects of particulate matter of the size 2.5 meters or less?

• a) It can directly enter into our circulatory system
• b) It can cause respiratory problems
• c) It can be inhaled into the lungs
• d) It can cause inflammation and damage to the lungs

Answer: It can directly enter into our circulatory system

Question: Which is the result of damage to relative biological effectiveness?

• a) Pollution
• b) Radiation
• c) Low temperature
• d) High temperature

Answer: Pollution

Question: The domestic sewage in large cities

• a) Is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
• b) Has a high BOD as it containing both aerobic and anaerobic bacteria
• c) When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
• d) Has very high amounts of suspended solids and dissolved salts

Answer:  Is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)

Question: Which among the following is likely to have the highest levels of D.D.T. depositions in its body?

• a) Sea gull
• b) Phytoplankton
• c) Eel
• d) Crab

Answer: Sea gull

Question: Sounds above what level are considered hazardous noise pollution?

• a) Above 80 dB
• b) Above 30 dB
• c) Above 150 dB
• d) Above 120 dB

Answer: Above 80 dB

Question: A disease caused by eating fish contaminated by industrial waste containing mercury compounds, is called

• a) Minimata disease
• b) Hashimoto’s disease
• c) Osteosclerosis
• d) Bright’s disease

Answer: Minimata disease

Question: When huge amount of sewage is dumped into a river, its B.O.D. will

• a) Increase
• b) Decrease
• c) Remain unchanged
• d) Slightly decrease

Answer: Increase

Question: The Taj Mahal is threatened due to the effect of

• a) Sulphur-dioxide
• b) Chlorine
• c) Hydrogen
• d) Oxygen

Answer:  Sulphur-dioxide

Question: In Minamata Bay of Japan the animals which remained free from minamata disease, are

• a) Rabbits
• b) Pigs
• c) Cats
• d) Dogs

Answer: Rabbits

Question: Which of the following isotopes is most dangerous to Homo sapiens?

• a) Strontium-90
• b) Caesium-137
• c) Phosphorus-32
• d) None of these

Answer: Strontium-90

Question: The most common indicator organism that represents polluted water is

• a) E. coli
• b) C. vibrio
• c) Entamoeba histolytica
• d) P. typhi

Answer: E. coli

Question: Phosphate pollution is caused by

• a) Sewage and agricultural fertilizers
• b) Agricultural fertilizers only
• c) Sewage and phosphate rock
• d) Phosphate rock only

Answer: Sewage and agricultural fertilizers

Question: The minamata disease in Japan was caused through the pollution of water by

• a) Mercury
• b) Lead
• c) Methyl isocyanate
• d) Cyanide

Answer: Mercury

Question: D.D.T. is

• a) A non-biodegradable pollutant
• b) Not a pollutant
• c) An antibiotic
• d) A biodegradable pollutant

Answer:  A non-biodegradable pollutant

Question: The maximum biomagnification would be in which of the following in case of aquatic ecosystem?

• a) Kelps
• b) Fishes
• c) Phytoplanktons
• d) Zooplanktons

Answer: Kelps

Question:  What is B.O.D.?

• a)

  

• b)

  

• c)

  

• d) All of these

Answer:

Question: Which of the following is absent in polluted water?

• a) Larva of stone fly
• b) Blue green algae
• c) Water hyacinth
• d) Hydrilla

Answer: Larva of stone fly

Question: What is the intensity of sound in normal conversation?

• a) 30-60 decibel
• b) 70-90 decibel
• c) 120-150 decibel
• d) 10-20 decibel

Answer: 30-60 decibel

Question: Fluoride pollution mainly affects

• a) Teeth
• b) Kidney
• c) Heart
• d) Brain

Answer: Teeth

Question: Escherichia coli is used as an indicator organism to determine pollution of water by means of

• a) Faecal matter
• b) Pollen of aquatic plants
• c) Heavy metals
• d) Industrial effluents

Answer: Faecal matter

Question:  Lead concentration in blood is considered alarming if it is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which one of the following is not used for disinfection of drinking water?

• a) Phenyl
• b) Chloramine
• c) Ozone
• d) Chlorine

Answer: Phenyl

Question: Which of the following organism is likely to have more concentration of D.D.T. in its body?

• a) Top carnivores
• b) Primary producers
• c) Herbivores
• d) Carnivores

Answer: Top carnivores

Question: Climate of the world is threatened by

• a) Increasing amount of atmospheric carbondioxide
• b) Decreasing amount of atmospheric carbondioxide
• c) Decreasing amount of atmospheric oxygen
• d) Increasing concentration of atmospheric oxygen

Answer: Increasing amount of atmospheric carbondioxide

Question: Which one of the following gases contribute maximum to the ‘green house effect’ on the earth?

• a) Carbon dioxide
• b) Chlorofluoro carbon
• c) Freon
• d) Methane

Answer: Carbon dioxide

Question: The true statement about ‘green-house effect’ is that it is

• a)

  

• b) None of these
• c)

  

• d)

  

Answer:

Question: Which country has the greatest contribution for the hole formation in ozone layer?

• a) USA
• b) Germany
• c) Japan
• d) Russia

Answer: USA

Question: In coming years, skin related disorders will be more common due to

• a) Depletion of ozone layer
• b) Use of detergents
• c) Water pollution
• d) Pollutants in air

Answer: Depletion of ozone layer

Question: Formation of ozone hole is maximum over

• a) Antarctica
• b) India
• c) Africa
• d) Europe

Answer:  Antarctica

Question: The supersonic jets cause pollution by the thinning of

• a) O₃ layer
• b) O₂ layer
• c) O₁ layer
• d) None of these

Answer: O₃ layer

Question: If there was no CO₂ in the earth’s atmosphere, the temperature of earth’s surface would be

• a) Less than the present
• b) Same as present
• c) Dependent on the amount of oxygen in the atmosphere
• d) Higher than the present

Answer: Less than the present

Question: Which important green-house gas, other than methane, is being produced from the agricultural fields?

• a) Nitrous oxide
• b) Ammonia
• c) Arsine
• d) Sulphur dioxide

Answer: Nitrous oxide

Question: Green house effect refers to

• a) Warming of earth
• b) Trapping of UV rays
• c) Production of cereals
• d) Cooling of earth

Answer: Warming of earth

Question: Maximum green house gases are released by which of the following country?

• a) USA
• b) Britain
• c) France
• d) India

Answer: USA

Question: Warm ocean surge of the peru current recurring every 5 to 8 years or so in the East Pacific of South America is widely known as

• a) EI-Nino
• b) Aye Aye
• c) Magnox
• d) Gulf stream

Answer: EI-Nino

Question:   Which of the following is the main factor of desertification?

• a) Over-grazing
• b) Tourism
• c) All of these
• d) Irrigated agriculture

Answer: Over-grazing