NEET Biology Multiple Choice Questions – Environmental Issues

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Environmental Issues Multiple Choice Questions

Question 1. Euro-2 (April 2000) is the emission norm for reducing

  1. O3 and CO
  2. NO2 and N2O
  3. Sulfur and aromatic hydrocarbons
  4. CO4 and particulate matter

Answer. 3. Sulfur and aromatic hydrocarbons

Question 2. Corrosion of Taj Mahal is due to the conversion of CaCO3 into

  1. CaSO4 and CaNO3
  2. Ca(OH)2
  3. CaO
  4. All of these

Answer. 1. CaSO4 and CaNO3

Question 3. ____________ is highly hazardous to animal health but on plants, this gas does not seem to show adverse effect.

  1. CO
  2. CO2
  3. SO2
  4. NO2

Answer. 1. CO

Question 4. The most effective greenhouse gas is

  1. CFC
  2. CO2
  3. Methane
  4. O2

Answer. 1. CFC

Question 5. Acid rain is due to

  1. 03, PAN
  2. Oxides of nitrogen and sulfur
  3. Greenhouse effect
  4. All of these

Answer. 2. Oxides of nitrogen and sulfur

Question 6. Pollutant responsible for causing phaeophytization is

  1. SO2
  2. NOX
  3. CO2
  4. Aeroallergens

Answer. 1. SO2

Question 7. Greenhouse gases are

  1. Absorbers of long-wave radiations from the earth
  2. Transparent to both solar radiations and long-wave radiations from the earth
  3. Absorbers of solar radiations for warming the atmosphere
  4. Transparent to emissions from the earth for passage into outer space

Answer. 1. Absorbers of long-wave radiations from the earth

Question 8. Ultraviolet radiations produce the photo oxidant

  1. SO2
  2. Flouride
  3. CO
  4. 03

Answer. 4. 03

Question 9. Major air pollutant is

  1. CO2
  2. N2
  3. CO
  4. S

Answer. 3. CO

Question 10. The products resulting from the atmospheric rea tions of hydrocarbons and nitrogen oxides in the presence of sunlight are called

  1. Primary pollutants
  2. Secondary pollutants
  3. Tertiary pollutants
  4. Non-pollutants

Answer. 2. Secondary pollutants

Question 11. Which of the following is a reddish-brown pollutant gas?

  1. NO
  2. N2O
  3. NO2
  4. NH3

Answer. 3. NO2

Question 12. Acid rain

(a) Causes necrosis

(b) Convert chlorophyll-a into pheophytin

(c) Responsible for the formation of PAN

  1. Only (a) and (b) are correct
  2. Only (b) and (c) are correct
  3. Only (a) is correct
  4. Only (c) is correct

Answer. 1. Only (a) and (b) are correct

Question 13. Which is not an effect of global warming?

  1. More extreme weather condition.
  2. Poleward shifting of organism.
  3. Rise of sea level.
  4. Good fungal growth in soil.

Answer. 4. Good fungal growth in soil.

Question 14. Which of the following conference obtained commitments from different countries for reducing overall greenhouse gas emission at a level 5% below 1990 level by 2008-2012?

  1. Kyoto Protocol, 1997
  2. Earth Summit, Rio-de-Janeiro, 1992
  3. Montreal Protocol, 1987
  4. Helsinki Declaration, 1989

Answer. 1. Kyoto Protocol, 1997

Question 15. Which plant has the maximum power of absorbing CO2 and oxides of nitrogen in a polluted area?

  1. Eucalyptus
  2. Coleus indica
  3. Robinia pseudoacacia
  4. Daucus carota

Answer. 3. Robinia pseudoacacia

Question 16. Arrange CFC, CH4, N2O, and CO2 in decreasing order according to their contribution in greenhouse effect:

  1. CO2 > N2O > CFC > CH4
  2. CFC > CO2 > CH4> N2O
  3. CH,>CFC>N,O>CO,
  4. CO, >CH_>CFC>N,O

Answer. 4. CO, >CH_>CFC>N,O

Question 17. Which is not a natural source of CH, in the environment?

  1. Biomass burning
  2. Termites
  3. Gut of ruminants
  4. Rice fields

Answer. 1. Biomass burning

Question 18. The controlled aerobic combustion of wastes inside chambers at temperature of 900-1300°C is known as

  1. Incineration
  2. Recycling
  3. Pyrolysis
  4. Sanitary dumping

Answer. 1. Incineration

Question 19. Aerosol is a suspension of

  1. Liquid or solid particles of more than 1 mm
  2. Liquid drops in air
  3. Liquid or solid particles of less than 1 mm
  4. Solid particles in air

Answer. 3. Liquid or solid particles of less than 1 mm

Question 20. Ozone hole was first discovered by

  1. Robert Augus
  2. Molina
  3. Farman
  4. Rowland

Answer. 3. Farman

Question 21. Which is not an effect of acidic rain in a pond?

  1. Increased fungal growth.
  2. Decreased insect population.
  3. Increased growth of green algae.
  4. NO, and SO, saturation.

Answer. 3. Increased growth of green algae.

Question 22. The smog which is formed at high temperature is

  1. London smog
  2. Classical smog
  3. Los Angeles smog
  4. Sulfurous smog

Answer. 3. Los Angeles smog

Question 23. Brown air and gray air is due to the oxides of

  1. Sulfur
  2. Nitrogen
  3. Carbon
  4. Phosphorus

Answer. 2. Nitrogen

Question 24. Third pollution is

  1. Pollution caused by the addition of an undesirable substance in air, water, soil, or land
  2. Deterioration in the quality of air, water, soil, etc., due to removal or reduction in the quality of an important or vital ingredient
  3. Ground water pollution due to seepage of minerals, toxic chemicals, and sewage
  4. Landscape pollution caused by throwing of rubbish, wastes, and garbage over land

Answer. 4. Landscape pollution caused by throwing of rubbish, wastes, and garbage over land

Question 25. Which is not a control measure to reduce particulate matter in environment?

  1. Cyclonic separators
  2. Scrubbers
  3. Effluent treatment
  4. Electrostatic precipitator

Answer. 3. Effluent treatment

Question 26. A chemical weed in troposphere and protectant in stratosphere is

  1. CH4
  2. 0
  3. CFC
  4. NO2

Answer. 3. CFC

Question 27. Ganga Action Plan for controlling pollution in Ganges started in

  1. 1985
  2. 1981
  3. 1987
  4. 1989

Answer. 1. 1985

Question 28. The presence of 20 or more genera of algae in a water body is an indication of high organic pollution. It is

  1. Water index
  2. Algal diversity index
  3. Pollution index
  4. Algal genus index

Answer. 4. Algal genus index

Question 29. The presence of E. coli in water indicates

  1. Water is clear
  2. Water is fully polluted
  3. Inorganic pollution
  4. Fecal pollution

Answer. 4. Fecal pollution

Question 30. Blue-baby syndrome is due to

  1. Air pollution
  2. Soil pollution
  3. Thermal pollution
  4. Radioactive pollution

Answer. 2. Soil pollution

Question 31. The release of phosphates and nitrates in water bodies (i.e., in rivers and lakes) leads to

  1. Nutrient enrichment (eutrophication)
  2. Reduced algal growth
  3. Increased algal growth
  4. Increased growth of decomposers

Answer. 3. Increased algal growth

Question 32. Soil fertility is depleted due to

  1. Pan breaking
  2. Terracing
  3. Intensive agricultur
  4. Contour bunding

Answer. 3. Intensive agriculture

Question 33. Spraying of pesticide is an example of

  1. Point source water pollution
  2. Diffuse water pollution
  3. Both (1) and (2)
  4. Pyrolysis

Answer. 2. Diffuse water pollution

Question 34. Ecological backlash (or ecological boomerang) is

  1. Heat emission due to bomb explosion
  2. Production of useful ecological effect by a previously useful chemical
  3. Formation of secondary pollutant from the reaction of primary pollutants
  4. Production of adverse ecological effect by a previously useful chemical

Answer. 4. Production of adverse ecological effect by a previously useful chemical

Question 35. Minamata disease is due to

  1. Oil spill in water
  2. Arsenic in the atmosphere
  3. Industrial waste having mercury in water
  4. Organic waste in drinking water

Answer. 3. Industrial waste having mercury in water

Question 36. Oil slick causes mass-scale death of fishes due to

  1. Clogging of gills
  2. Disruption of food chain
  3. Non-availability of food
  4. All of these

Answer. 1. Clogging of gills

Question 37. Wastes may be sealed in concretefilled drums and discharged to a depth of about 500 m. This specific statement is true for

  1. Radiation pollutants
  2. UV radiation pollutants
  3. Particle pollutants
  4. All radioactive pollutants

Answer. 4. All radioactive pollutants

Question 38. Bone cancer is caused by

  1. Iodine 127
  2. Strontium 90
  3. Cesium 137
  4. None of these

Answer. 2. Strontium 90

Question 39. As a general rule, ionizing radiation is most damaging to

  1. Mature, stable cells
  2. Actively dividing cells
  3. Highly specialized cells
  4. Cells in which food is stored

Answer. 2. Actively dividing cells

Question 40. Volcanic eruptions let out large quantities of

  1. Harmful dust and sulfurous gases
  2. Harmful dust and nitrous gases
  3. Harmful dust and carbonous gases
  4. Harmful dust and phosphorous gases

Answer. 3. Harmful dust and carbonous gases

Question 41. Painful skeletal deformity called itai-itai is caused due to

  1. Cd
  2. Hg
  3. CO
  4. NO2

Answer. 1. Cd

Question 42. Acoustic zoning is related with

  1. Soil pollution
  2. Noise pollution
  3. Water pollution
  4. Air pollution

Answer. 2. Noise pollution

Question 43. Montreal Protocol was aimed to

  1. Reduce greenhouse gases
  2. Limit the production and use of ODS
  3. Mitigate climatic change
  4. Implement Agenda 21

Answer. 2. Limit the production and use of ODS

Question 44. The Government of India has introduced a concept to work closely with local communities for protection and management of forests called

  1. Jhum cultivation
  2. Chipko Movement
  3. Appiko Movement
  4. Joint Forest Management

Answer. 4. Joint Forest Management

Question 45. The National Forest Policy of India has recommended percent forest cover for hilly areas.

  1. 67
  2. 33
  3. 19.4
  4. 30

Answer. 1. 67

Question 46. To spread information and help on the practice of integrated organic farming is started by a group of farmers in

  1. Haryana
  2. Bangalore
  3. Delhi
  4. Jodhpur

Answer. 1. Haryana

Question 47. Find the odd one out with respect to e-waste:

  1. India
  2. Pakistan
  3. China
  4. America

Answer. 4. America

Question 48. Minerals, metals, and fossil fuels are which type of resources of energy?

  1. Renewable
  2. Non-renewable
  3. Biodegradable
  4. Degradable

Answer. 2. Non-renewable

Question 49. Thermal pollution is caused by

  1. Power plants
  2. Industries
  3. Automobiles
  4. All of the above

Answer. 4. All of the above

Question 50. The addition of any substance to water which leads to change in its physical and chemical characteristics is defined as water pollution. It results in

  1. Decreased turbidity
  2. Increased oxygenation
  3. Increased photosynthesis
  4. Increased turbidity and deoxygenation

Answer. 4. Increased turbidity and deoxygenation

Question 51. Which of the following is not a greenhouse gas?

  1. CH4
  2. N2O
  3. H2O
  4. CO2

Answer. 3. H2O

Question 52. High BOD indicates

  1. Highly polluted water
  2. Less pollution in H2O
  3. Less sewage
  4. Less microorganism

Answer. 1. Highly polluted water

Question 53. Increasing the concentration along food chain is of accumulated pollutant

  1. Biomagnification
  2. Bioaccumulation
  3. Eutrophication
  4. Biodiversity

Answer. 1. Biomagnification

Question 54. Which one of the following is a renewable source of energy?

  1. Petroleum
  2. Coal
  3. Nuclear fuel
  4. Trees

Answer. 4. Trees

Question 55. Spraying of DDT produces pollution of

  1. Air only
  2. Air and soil only
  3. Air, soil, and water
  4. Air and water only

Answer. 3. Air, soil, and water

Question 56. Sewage water is purified for recycling by the action of

  1. Light
  2. Microorganisms
  3. Aquatic plants
  4. Fishes

Answer. 2. Microorganisms

Question 57. Which one is not dangerous?

  1. Biopollutants
  2. Ozone layer
  3. Nuclear blast
  4. Deforestation

Answer. 2. Ozone layer

Question 58. Which of the following a set is greenhouse gases?

  1. CFC, CH4, CO2, N20
  2. CO2, CH4, N2, O2
  3. CO2, CH4, N2O3
  4. CO2, CFC, N2, O2

Answer. 1. CFC, CH4, CO2, N20

Question 59. Acid rain is due to pollution by

  1. CO2
  2. SO2 and NO2
  3. Dust particles
  4. Automobiles

Answer. 2. SO2 and NO2

Question 60. Which of the following is a biodegradable pollutant?

  1. Sewage
  2. Plastic
  3. Polythene
  4. DDT

Answer. 1. Sewage

Question 61. The most hazardous metal pollutant of automobile exhaust is

  1. Cadmium
  2. Lead
  3. Mercury
  4. Copper

Answer. 2. Lead

Question 62. Air quality indicator is

  1. Lichen
  2. Moss
  3. Algae
  4. None of these

Answer. 1. Lichen

Question 63. Blood hemoglobin has high affinity for

  1. CO2
  2. CO
  3. O2
  4. H2

Answer. 2. CO

Question 64. Minamata disease caused due to water pollution is due to

  1. Lead poisoning
  2. Arsenic chloride poisoning
  3. Mercury poisoning
  4. Ammonia pollution

Answer. 3. Mercury poisoning

Question 65. Effect of pollution is first marked on

  1. Microorganisms
  2. Green vegetation of an area
  3. Food crop
  4. None of these

Answer. 2. Green vegetation of an area

Question 66. Pollution is not caused by

  1. Thermal power plant
  2. Automobile
  3. Radioactive power plant
  4. Hydroelectric power plant

Answer. 4. Hydroelectric power plant

Question 67. Taj Mahal marble is affected by

  1. SO2
  2. O2
  3. O3
  4. NO2

Answer. 1. CO2

Question 68. Minamata disease first occurred in

  1. Japan
  2. China
  3. Korea
  4. Russia

Answer. 1. Japan

Question 69. Increase in the BOD of water reservoir is due to

  1. Algae
  2. Soil
  3. Moss
  4. Waste product

Answer. 4. Waste product

Question 70. Number of wildlife is continuously decreasing. What is the main reason behind this?

  1. Predation
  2. Cutting down of forest
  3. Destruction of habitat
  4. Hunting

Answer. 3. Destruction of habitat

Question 71. One of the following is associated with the conservation of forests. Find the one.

  1. Kaziranga
  2. Ghana
  3. Silent valley
  4. Gir

Answer. 3. Silent valley

Question 72. Which one of the following is a pair of endangered species?

  1. Garden lizard and Mexican poppy
  2. Rhesus monkey and sal tree
  3. Indian peacock and carrot grass
  4. Hornbill and Indian aconite

Answer. 4. Hornbill and Indian aconite

Question 73. If the Bengal Tiger becomes extinct,

  1. Hyenas and wolves will become scare
  2. The wild areas will be safe for man and domestic animals
  3. Its gene pool will be lost forever
  4. The populations of beautiful animals such as deers will get stabilized

Answer. 3. Its gene pool will be lost forever

Question 74. If high-altitude birds become rare or extinct, the plants which may disappear along with them are

  1. Pine
  2. Oak
  3. Orchids
  4. Rhododrons

Answer. 4. Rhododrons

Question 75. Which one of the following pairs of geographical areas shows maximum biodiversity in our country?

  1. Sunderbans and Rann of Kutch
  2. Eastern Ghats and West Bengal
  3. Eastern Himalaya and Western Ghats
  4. Kerala and Punjab

Answer. 3. Eastern Himalaya and Western Ghats

Question 76. One of the ex situ conservation methods for endangered species is

  1. Wildlife sanctuaries
  2. Biosphere reserves
  3. Cryopreservation
  4. National parks

Answer. 3. Cryopreservation

Question 77. Reason for the elimination of wildlife is

  1. Deforestation
  2. Forest fire
  3. Floods
  4. Less rainfall

Answer. 1. Deforestation

Question 78. The main reason of disturbance of biological diversity is

  1. Greenhouse effect
  2. Hunting
  3. Soil erosion
  4. Destruction of natural habitats

Answer. 4. Destruction of natural habitats

Question 79. The best method to preserve the wild relatives of plants is

  1. By growing them in natural habitats
  2. Gene library
  3. By storing seeds
  4. Cryopreservation

Answer. 1. By growing them in natural habitats

Question 80. Species diversity is the maximum in

  1. Tropical rain forest
  2. Temperate forest
  3. Deserts
  4. Hill slopes

Answer. 1. Tropical rain forest

Question 81. According to the Forestry Commission report 1997, the total forest cover of India was

  1. 11%
  2. 19.5%
  3. 17%
  4. 18.7%

Answer. 2. 19.5%

Question 82. What shall be the effect of destruction of wildlife?

  1. Wild gene of disease resistance will not be obtained
  2. Soil erosion
  3. Floods
  4. Greenhouse effect

Answer. 1. Wild gene of disease resistance will not be obtained

Question 83. The reason behind the occurrence of endemic species in South America and Australia is

  1. The species has been extinct from other regions
  2. Continental separation
  3. There is no terrestrial route to these places
  4. Retrogressive evolution

Answer. 2. Continental separation

Question 84. In your opinion, which is the most effective way to conserve the plant diversity of an area?

  1. By creating biosphere reserve
  2. By creating botanical garden
  3. By developing seed bank
  4. By tissue culture method

Answer. 1. By creating biosphere reserve

Question 85. The Biodiversity Act of India was passed by the Parliament in the year

  1. 2002
  2. 1992
  3. 1996
  4. 2000

Answer. 1. 2002

Question 86. According to the IUCN Red List, what is the status of red panda (Ailurus fulgens)?

  1. Critically species
  2. Vulnerable species
  3. Extinct species
  4. Endangered species

Answer. 4. Endangered species

Question 87. One of the most important functions of botanical gardens is that

  1. They provide a beautiful area for recreation
  2. One can observe tropical plants there
  3. They allow ex situ conservation of germplasm
  4. They provide the natural habitat for wildlife

Answer. 3. They allow ex situ conservation of germplasm

Question 88. Which of the following pairs of animal and plant represents endangered organisms in India?

  1. Cinchona and leopard
  2. Banyan and black buck
  3. Bentinckia nicobarica and red panda
  4. Tamarind and rhesus monkey

Answer. 3. Bentinckia nicobarica and red panda

Question 89. Which one of the following is not included under in situ conservation?

  1. Biosphere reserve
  2. National park
  3. Sanctuary
  4. Botanical garden

Answer. 4. Botanical garden

Question 90. Which one of the following is the correctly matched pair of endangered animal and national park?

  1. Wild ass-Dudhwa National Park
  2. Great Indian-Keoladeo National Park Bustard
  3. Lion-Corbett National Park
  4. Rhinoceros-Kaziranga National Park

Answer. 4. Rhinoceros-Kaziranga National Park

Question 91. Which of the following is considered a hot-spot of biodiversity in India?

  1. Eastern Ghats
  2. Aravalli Hills
  3. Western Ghats
  4. Indo-Gangetic Plain

Answer. 3. Western Ghats

Question 92. Identify the odd combination of the habitat and the particular animal concerned:

  1. Rann of Kutch-Wild ass
  2. Dachigam National Park-Snow leopard
  3. Sunderbans-Bengal tiger
  4. Periyar-Elephant

Answer. 2. Dachigam National Park-Snow leopard

Question 93. Which one of the following pairs of organisms are exotic species introduced in India?

  1. Nile perch, Ficus religiosa
  2. Ficus religiosa, Lantana camara
  3. Lantana camara, Water hyacinth
  4. Water hyacinth, Prosopis cinereia

Answer. 3. Lantana camara, Water hyacinth

Question 94. Which one of the following is not observed in biodiversity hotspots?

  1. Lesser inter-specific competition
  2. Species richness
  3. Endemism
  4. Accelerated species loss

Answer. 1. Lesser inter-specific competition

Question 95. Tiger is not a resident in which one of the following national parks?

  1. Jim Corbett
  2. Ranthambhor
  3. Sunderbans
  4. Gir

Answer. 4. Gir

Question 96. Which one of the following is an example of ex situ conservation?

  1. Wildlife sanctuary
  2. Seed bank
  3. Sacred groves
  4. National park

Answer. 2. Seed bank

Question 97. The Indian Rhinoceros are a natural inhabitant of which Indian state?

  1. Uttar Pradesh
  2. Himachal Pradesh
  3. Assam
  4. Uttarakhand

Answer. 3. Assam

Question 98. Which of the following is the non-conventional source of energy?

  1. Coal
  2. Petroleum
  3. Electricity from nuclear power plants
  4. Solar radiations

Answer. 4. Solar radiations

Question 99. Petroleum resource is

  1. Renewable
  2. Non-renewable
  3. Synthetic and biodegradable
  4. Infinite and unconventional,

Answer. 2. Non-renewable

Question 100. Biological oxygen demand (BOD) is a measure of

  1. Industrial wastes poured into water bodies
  2. Extent to which water is polluted with organic compounds
  3. Amount of carbon monoxide inseparably combined with hemoglobin
  4. Amount of oxygen needed by green plants during night

Answer. 2. Extent to which water is polluted with organic compounds

Question 101. In almost all Indian metropolitan cities such as Delhi, the major atmospheric pollutant/s is/are

  1. Suspended particulate matter (SPM)
  2. Oxides of sulfur
  3. Carbon dioxide and carbon monoxide
  4. Oxides of nitrogen

Answer. 1. Suspended particulate matter (SPM)

Question 102. Nitrogen oxides produced from the emission of automobiles and power plants are the source of fine air borne particles which lead to

  1. Photochemical smog
  2. Dry acid deposition
  3. Industrial smog
  4. Wet acid deposition

Answer. 2. Dry acid deposition

Question 103. A lake with an inflow of domestic sewage rich in organic waste may result in

  1. Drying of the lake very soon due to algal bloom
  2. An increased production of fish due to lots of nutrients
  3. Death of fish due to lack of oxygen
  4. Increased population of aquatic food web organisms

Answer. 3. Death of fish due to lack of oxygen

Question 104. Minamata disease was caused due to the consumption of

  1. Sea food containing a lot of cadmium
  2. Fish contaminated with mercury
  3. Oysters with a lot of pesticide
  4. Sea food contaminated with selenium

Answer. 2. Fish contaminated with mercury

Question 105. Which one of the following statements pertaining to pollutants is correct?

  1. DDT is a non-biodegradable pollutant.
  2. Excess fluoride in drinking water causes osteoporosis.
  3. Excess cadmium in drinking water causes black foot disease.
  4. Methyl mercury in water may cause “itai itai” disease.

Answer. 1. DDT is a non-biodegradable pollutant.

Question 106. If CO2 is absent in the atmosphere of earth, then

  1. Temperature will decrease
  2. Temperature will increase.
  3. Plants will flourish well
  4. No effect

Answer. 1. Temperature will decrease

Question 107. CO is harmful because

  1. It forms stable compound with hemoglobin
  2. It blocks mitosis
  3. It is mutagenic
  4. It causes defloation

Answer. 1. It forms stable compound with hemoglobin

Question 108. Besides CH, and CO2, other greenhouse gas from agriculture area is

  1. SO2
  2. NH3
  3. NO2
  4. CFC

Answer. 3. NO2

Question 109. Temperature variation in Pacific Ocean in present time is called

  1. Cyclone effect
  2. El Niño effect
  3. Greenhouse effect
  4. Gaudikov’s effect

Answer. 2. El Niño effect

Question 110. Sewage purification is performed by

  1. Microbes
  2. Fertilizers
  3. Antibiotics
  4. Antiseptics

Answer. 1. Microbes

Question 111. The best economic method to harvest the solar energy is

  1. Solar cell
  2. Energy plantation
  3. Cultivation of sugarcane; then energy obtained by burning it
  4. Solar cooker

Answer. 2. Energy plantation

Question 112. The Bhopal Gas Tragedy is related with

  1. Methane
  2. Carbon monoxide
  3. Methyl isocyanate (MIC)
  4. SO2

Answer. 3. Methyl isocyanate (MIC)

Question 113. The concentration of DDT is the highest in

  1. Primary consumer
  2. Producers
  3. Top consumer
  4. Decomposers

Answer. 3. Top consumer

Question 114. Lichens can be used

  1. Bioindicator for water and air pollution
  2. Initial vegetation for waste lands
  3. Source of wood
  4. To check air pollution

Answer. 1. Bioindicator for water and air pollution

Question 115. What is phytotron?

  1. A device to grow plants in controlled environment.
  2. Growing plants in greenhouse.
  3. Radiation chamber to induce mutations.
  4. Apparatus to study the effect of light on plants.

Answer. 1. A device to grow plants in controlled environment.

Question 116. Which of the following is a secondary pollutant?

  1. PAN
  2. CO
  3. NO2
  4. SO2

Answer. 1. PAN

Question 117. Maximum DDT is present in birds feeding on

  1. Fishes
  2. Meat
  3. Insects
  4. Seeds

Answer. 1. Fishes

Question 118. Which one is associated with occupational hazard?

  1. Fluorosis
  2. Pneumoconiosis
  3. Silicosis
  4. Asthama

Answer. 2. Pneumoconiosis

Question 119. Greenhouse effect is

  1. Gardening outside the house
  2. Global cooling
  3. Global warming
  4. Green color house

Answer. 3. Global warming

Question 120. What is BOD?

  1. The amount of O2 utilized by organisms in water.
  2. The amount of O2 utilized by microorganisms for decomposition.
  3. The total amount of O2 present in water.
  4. All of the above.

Answer. 2. The amount of O2 utilized by microorganisms for decomposition.

Question 121. What is the intensity of sound in normal conversation?

  1. 10-20 db
  2. 30-60 db
  3. 70-90 db
  4. 120-150 db

Answer. 2. 30-60 db

Question 122. Which of the following is absent in polluted water?

  1. Hydrilla
  2. Water hyacinth
  3. Larva of stone fly
  4. Blue green algae

Answer. 3. Larva of stone fly

Question 123. The maximum greenhouse gas is released by which country?

  1. India
  2. France
  3. USA
  4. Britain

Answer. 3. USA

Question 124. Lead concentration in blood is considered alarming if it is

  1. 30 mg/100 ml
  2. 4-6 mg/100 ml
  3. 10 mg/100 ml
  4. 20 mg/100ml

Answer. 3. 10 mg/100 ml

Question 125. In 1984, the Bhopal Gas Tragedy took place because methyl isocyanate

  1. Reacted with ammonia.
  2. Reacted with CO2
  3. Reacted with water
  4. Reacted with DDT

Answer. 3. Reacted with water

Question 126. Blood analysis of a patient reveals an unusually high quantity of carboxyhemoglobin content. Which of the following conclusion is the most likely to be correct? The patient has been inhaling polluted air containing unusually high content of

  1. Carbon monoxide
  2. Carbon disulfide
  3. Chloroform
  4. Carbon dioxide

Answer. 1. Carbon monoxide

Question 127. The common indicator organism of water pollution is

  1. Entamoeba histolytica
  2. Lemna paucicostata
  3. Eichhornia crassipes
  4. Escherichia coli

Answer. 4. Escherichia coli

Question 128. Which one of the following pairs in mismatched?

  1. Nuclear power – Radioactive wastes
  2. Solar energy – Greenhouse effect
  3. Fossil fuel burning – Release of CO2
  4. Biomass burning-Release of CO2

Answer. 2. Solar energy – Greenhouse effect

Question 129. Identify the correctly matched pair?

  1. Kyoto Protocol-Climatic change
  2. Montreal Protocol – Global warming
  3. Basal convention Biodiversity conservation
  4. Ramsar convention-Ground water pollution

Answer. 1. Kyoto Protocol-Climatic change

Question 130. Prolonged liberal irrigation of agricultural fields is likely to create the problem of

  1. Acidity
  2. Aridity
  3. Salinity
  4. Metal toxicity

Answer. 3. Salinity

Question 131. Which of the following is not used for the disinfection of drinking water?

  1. Chlorine
  2. Ozone
  3. Chloramine
  4. Phenyl

Answer. 4. Phenyl

Question 132. The limit of BOD prescribed by the Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is 

  1. < 100 ppm
  2. <30 ppm
  3. <3 ppm
  4. < 10 ppm

Answer. 2. <30 ppm

Question 133. The “blue baby” syndrome results from

  1. Excess of dissolved oxygen
  2. Excess of TDS (total dissolved solids)
  3. Excess of chloride
  4. Methaemoglobinaemia

Answer. 4. Methaemoglobinaemia

Question 134. Montreal Protocol, which calls for appropriate action to protect the ozone layer from human activities, was passed in the year

  1. 1988
  2. 1985
  3. 1986
  4. 1987

Answer. 4. 1987

Question 135. Photochemical smog pollution does not contain

  1. Carbon dioxide
  2. PAN (peroxy acyl nitrate)
  3. Ozone
  4. Nitrogen dioxide

Answer. 1. Carbon dioxide

Question 136. In a coal-fired power plant, electrostatic precipitators are installed to control the emission of pollution?

  1. CO
  2. SO2
  3. NO
  4. SPM

Answer. 4. SPM

Question 137. Which one of the following is not a bioindicator of water

  1. Sewage fungus
  2. Sludge worms
  3. Blood-worms
  4. Stone flies

Answer. 4. Stone flies

Question 138. Which one of the following is the correct percentage of the two (out of the total of four) greenhouse gases that contribute to the total global warming?

  1. N,O 6%, CO, 86%
  2. Methane 20%, N2O 18%
  3. CFCs 14%, methane 20%
  4. CO2 40%, CFCs 30%

Answer. 3. CFCs 14%, methane 20%

Question 139. The World Summit on Sustainable Development (2002) was held in

  1. Argentina
  2. South Africa
  3. Brazil
  4. Sweden

Answer. 2. South Africa

Question 140. About 70% of total global carbon is found in

  1. Ocean
  2. Forests
  3. Desert
  4. Rain forest

Answer. 1. Ocean

Question 141. 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 fertilizers 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 population in the lake declined initially thereby greatly reducing photosynthesis.

Which two of the above were the main causes of fish mortality in the lake?

  1. (a), (c)
  2. (a), (b)
  3. (b), (c)
  4. (c), (d)

Answer. 1. (a), (c)

Question 142. According to the Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for the greatest harm to human health?

  1. 1.0 or less
  2. 5.2-2.5
  3. 2.5 or less
  4. 1.5 or less

Answer. 3. 2.5 or less

Question 143. The Montreal Protocol aims at

  1. Control of CO2 emission
  2. Reduction of ozone depleting substances
  3. Biodiversity conservation
  4. Control of water pollution

Answer. 2. Reduction of ozone depleting substances

Question 144. The Chipko Movement was launched for the protection of

  1. Wet lands
  2. Grasslands
  3. Forests
  4. Livestock

Answer. 3. Forests

Question 145. Steps taken by the Government of India to control air pollution include

  1. Use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks
  2. Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel
  3. Compulsory PUC (pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons
  4. Permission to use only pure diesel with a maximum of 500 ppm sulfur as fuel for vehicles

Answer. 1. Use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks

Question 146. Biochemical oxygen demand (BOD) in river water

  1. Increases when sewage gets mixed with river water
  2. Remains unchanged when algal bloom occurs
  3. Has no relationship with the concentration of oxygen in water
  4. Gives a measure of Salmonella in water

Answer. 1. Increases when sewage gets mixed with river water

Question 147. DDT residues are rapidly passed through food chain causing biomagnification because DDT is

  1. Water soluble
  2. Fat soluble
  3. Moderately toxic

Non-toxic to aquatic animals

Answer. 2. Fat soluble

Question 148. Global agreement in specific control strategies to reduce the release of ozone depleting substances was adopted by 

  1. The Vienna Convention
  2. Rio de Janeiro Conference
  3. The Montreal Protocol
  4. The Koyoto Protocol

Answer. 3. The Montreal Protocol

Question 149. Breeding of crops with high levels of minerals, vitamins, and proteins is called

  1. Somatic hybridization
  2. Biofortification
  3. Biomagnification
  4. Micropropagation

Answer. 2. Biofortification

Question 150. The two gases making the highest relative contribution to the greenhouse gases are

  1. CO2 and CH4
  2. CH, and N2O
  3. CFCs and N2O
  4. CO2 and N2O

Answer. 1. CO2 and CH4

Question 151. A renewable exhaustible natural resource is

  1. Coal
  2. Petroleum
  3. Minerals
  4. Forest.

Answer. 4. Forest.

Question 152. When domestic sewage mixes with river water,

  1. The increased microbial activity releases micronutrients such as iron
  2. The increased microbial activity uses up dissolved oxygen
  3. The river water is still suitable for drinking as impurities are only about 0.1%
  4. Small animals such as rats will die after drinking river water

Answer. 2. The increased microbial activity uses up dissolved oxygen

Question 153. Measuring BOD is a method used for

  1. Working out the efficiency of oil driven automobile engines.
  2. Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale
  3. Working out the efficiency of RBCs about their capacity to carry oxygen
  4. Estimating the amount of organic matter in sewage water

Answer. 4. Estimating the amount of organic matter in sewage water

Question 154. Which one of the following is a wrong statement?

  1. Ozone in the upper part of atmosphere is harmful to animals.
  2. Greenhouse effect is a natural phenomenon.
  3. Eutrophication is a natural phenomenon in fresh water bodies.
  4. Most of the forests have been lost in tropical areas.

Answer. 1. Ozone in the upper part of atmosphere is harmful to animals.

Question 155. Which one of the following areas in India is a hotspot of biodiversity?

  1. Gangetic Plain
  2. Sunderbans
  3. Western Ghats
  4. Eastern Ghats

Answer. 3. Western Ghats

Question 156. Select the correct statement about biodiversity:

  1. The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals.
  2. Large scale planting of Bt cotton has no adverse effect on biodiversity.
  3. Western Ghats have a very high degree of species richness and endemism.
  4. Conservation of biodiversity is just a fad pursued by the developed countries.

Answer. 3. Western Ghats have a very high degree of species richness and endemism.

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