MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1049 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Density of a population (D) is |
| A. | D = S(size) / W(weight) |
| B. | D = S(space) / N(number) |
| C. | D = N(number) / S(space) |
| D. | None of the above |
| Answer» D. None of the above | |
| 52. |
Demographic features of developing countries are |
| A. | High infant mortality, low fertility, young age distribution and uneven population growth |
| B. | High fertility, high density, high mortality rate and young age distribution |
| C. | High fertility, falling mortality rate, rapid population growth and young age distribution |
| D. | High density, high mortality, uneven population growth and very old age distribution |
| Answer» D. High density, high mortality, uneven population growth and very old age distribution | |
| 53. |
Which of the following processes adds to the removal of carbon dioxide from the atmosphere? |
| A. | Burning fossil fuels |
| B. | Photosynthesis |
| C. | Respiration |
| D. | Deforestation |
| Answer» C. Respiration | |
| 54. |
Treated water can be disinfected by adding |
| A. | Alum |
| B. | Fluorine |
| C. | Chlorine |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 55. |
Primary source of energy in a food web is/are |
| A. | Green plants |
| B. | Sun |
| C. | Inorganic nutrients |
| D. | Animals |
| Answer» C. Inorganic nutrients | |
| 56. |
Which one of the following is not included under in situ conservation? |
| A. | Zoo |
| B. | National Park |
| C. | Wild life Sanctuary |
| D. | Biosphere Reserve |
| Answer» B. National Park | |
| 57. |
A poisonous gas given out of a vehicle exhaust is |
| A. | Methane |
| B. | Ethane |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» E. | |
| 58. |
Peeling of Ozone umbrella, which protects us from UV rays, is caused by |
| A. | Carbon monoxide |
| B. | CFCs |
| C. | Coal burning |
| D. | Methane |
| Answer» C. Coal burning | |
| 59. |
A pH of rainwater is |
| A. | 5-6 |
| B. | 6-7 |
| C. | 7-8 |
| D. | 8-9 |
| Answer» B. 6-7 | |
| 60. |
Which of the following is the most environmental friendly agricultural practice? |
| A. | Using chemical fertilizers |
| B. | Using insecticides |
| C. | Organic farming |
| D. | None of the above |
| Answer» D. None of the above | |
| 61. |
Which of the following statements regarding the greenhouse effect has the lowest degree of certainty? |
| A. | Addition of greenhouse gases to the atmosphere results in increased heat energy in the atmosphere |
| B. | Global warming will result in an increase in the number of tropical storms |
| C. | Global warming will result in rising sea levels |
| D. | The concentrations of greenhouse gases in the atmosphere are increasing due to human activities. |
| Answer» C. Global warming will result in rising sea levels | |
| 62. |
A human population is small, there is greater chance of |
| A. | Mutation |
| B. | Gene flow |
| C. | Genetic drift |
| D. | Natural selection |
| Answer» D. Natural selection | |
| 63. |
The main factors contributing to the decline in death rate in 20th century were |
| A. | Improved agricultural practices and increased birth rates |
| B. | Improved health care, sanitation and nutrition |
| C. | Endemic poverty and low levels of education |
| D. | European colonization and improved agriculture practices |
| Answer» C. Endemic poverty and low levels of education | |
| 64. |
Water logging is a phenomenon in which |
| A. | Crop patterns are rotated |
| B. | Soil root zone becomes saturated due to over irrigation |
| C. | Erosion of soil |
| D. | None of the above |
| Answer» C. Erosion of soil | |
| 65. |
Disposable glasses and plates are made up of |
| A. | PVC |
| B. | Polystyrene |
| C. | Polyvinyl alcohol |
| D. | Polypropylene |
| Answer» E. | |
| 66. |
Increasing skin cancer and high mutation rate are the result of |
| A. | Global warming |
| B. | Ozone depletion |
| C. | Acid rain |
| D. | Pollution |
| Answer» C. Acid rain | |
| 67. |
The most important remedy to avoid negative impact due to industrialization is |
| A. | industry should be closed |
| B. | don’t allow new industrial units |
| C. | industry should treat all the wastes generated by it before disposal |
| D. | industries should be shifted far away from human habitats |
| Answer» D. industries should be shifted far away from human habitats | |
| 68. |
The burning of fossil fuels releases large amount of |
| A. | Nitrogen |
| B. | Sulphur |
| C. | Carbon |
| D. | Hydrogen |
| Answer» C. Carbon | |
| 69. |
Yellowing of Taj Mahal is an effect of |
| A. | Acid rain |
| B. | Global warming |
| C. | Ozone depletion |
| D. | All of the above |
| Answer» B. Global warming | |
| 70. |
Thickness of ozone layer is measured in |
| A. | Decibels |
| B. | Dobson unit |
| C. | Meter |
| D. | Armstrong unit |
| Answer» C. Meter | |
| 71. |
Which group of vertebrates comprises of highest number of species |
| A. | Mammals |
| B. | Fishes |
| C. | Reptiles |
| D. | Birds |
| Answer» C. Reptiles | |
| 72. |
The discharge of warm/hot water directly into rivers is known as |
| A. | Water pollution |
| B. | Thermal pollution |
| C. | Marine pollution |
| D. | None of the above |
| Answer» C. Marine pollution | |
| 73. |
Resources that take too long a period of time to be used as a resource are called as |
| A. | Renewable resource |
| B. | Non-renewable resource |
| C. | Exhaustible resource |
| D. | Inexhaustible resource |
| Answer» E. | |
| 74. |
Which out of the following is a measure to control air pollution |
| A. | Reduction in use of fossil fuels |
| B. | Increasing use of renewable energy resources |
| C. | Using catalytic convertors in vehicles |
| D. | All of the above |
| Answer» E. | |
| 75. |
A river with high BOD value means |
| A. | Highly polluted |
| B. | Highly clean |
| C. | Highly productive |
| D. | None of the above |
| Answer» B. Highly clean | |
| 76. |
Which of the following are major environmental issues involved in mining? |
| A. | air pollution |
| B. | water pollution |
| C. | soil degradation |
| D. | all of the above |
| Answer» E. | |
| 77. |
The burning of fossil fuels releases a large amount of |
| A. | Nitrogen into air |
| B. | Sulphur into air |
| C. | Carbon dioxide into air |
| D. | Oxygen into air |
| Answer» C. Carbon dioxide into air | |
| 78. |
Main source of acid rain is |
| A. | Sulphur dioxide |
| B. | Nitrogen |
| C. | Carbon dioxide |
| D. | Carbon monoxide |
| Answer» B. Nitrogen | |
| 79. |
IUCN Headquarters is at |
| A. | Morges, Switzerland |
| B. | Paris, France |
| C. | Vienna, Austria |
| D. | New York, USA |
| Answer» B. Paris, France | |
| 80. |
Darwin’s finches are a good example of |
| A. | Convergent evolution |
| B. | Adaptive radiation |
| C. | Connecting link |
| D. | Industrial melanism |
| Answer» C. Connecting link | |
| 81. |
Which is the only country who has not ratified the Kyoto Protocol yet? |
| A. | United States |
| B. | Australia |
| C. | Japan |
| D. | India |
| Answer» B. Australia | |
| 82. |
HIV is not likely to be transmitted by |
| A. | Sharing needles of injections |
| B. | Mosquito bites |
| C. | Blood transfusion |
| D. | Breast feeding |
| Answer» E. | |
| 83. |
Each environment supports a limited population depending upon its |
| A. | Biotic potential |
| B. | Carrying capacity |
| C. | Natality |
| D. | Reproductive potential |
| Answer» C. Natality | |
| 84. |
Which out of the following are the causes of soil erosion? |
| A. | Unrestricted grazing |
| B. | Over cultivation |
| C. | Deforestation |
| D. | All of the above |
| Answer» E. | |
| 85. |
Group of interbreeding organisms found in a particular area is |
| A. | Population |
| B. | Community |
| C. | Tribe |
| D. | Density |
| Answer» B. Community | |
| 86. |
Mass of living matter at a trophic level in an area at any given time is called |
| A. | Standing state |
| B. | Standing crop |
| C. | Humus |
| D. | Detritus |
| Answer» C. Humus | |
| 87. |
A product of photosynthesis is |
| A. | Carbon dioxide |
| B. | Water |
| C. | Oxygen |
| D. | Chlorophyll |
| Answer» D. Chlorophyll | |
| 88. |
The objective of Environment studies is |
| A. | Raise consciousness about environment conditions |
| B. | To teach environmentally appropriate behavior |
| C. | Create an environmental ethic sensitive society |
| D. | All of the above |
| Answer» E. | |
| 89. |
The upright pyramid of numbers is absent in |
| A. | Lake |
| B. | Pond |
| C. | Grasslands |
| D. | Forests |
| Answer» E. | |
| 90. |
Environment is the life support system that includes |
| A. | Air |
| B. | Water |
| C. | Land |
| D. | All of the above |
| Answer» E. | |
| 91. |
Noise is measured by sound meter and the unit is |
| A. | Hertz |
| B. | Joule |
| C. | Decibel |
| D. | Seconds |
| Answer» D. Seconds | |
| 92. |
Which of the ecological pyramid is always upright |
| A. | Pyramid of numbers |
| B. | Pyramid of biomass |
| C. | Pyramid of energy |
| D. | All of the above |
| Answer» D. All of the above | |
| 93. |
What is most important factor for the success of animal population? |
| A. | Natality |
| B. | Adaptability |
| C. | Interspecies activity |
| D. | Unlimited food |
| Answer» C. Interspecies activity | |
| 94. |
Excess atmospheric carbon dioxide increases greenhouse effect as carbon dioxide |
| A. | Precipitates dust in the atmosphere |
| B. | Is opaque to infrared rays |
| C. | Reduces atmospheric pressure |
| D. | Is heavier than other gases |
| Answer» C. Reduces atmospheric pressure | |
| 95. |
The world population in 2000 was approximately |
| A. | 5.1 billion |
| B. | 2.1 billion |
| C. | 6 billion |
| D. | 8 billon |
| Answer» D. 8 billon | |
| 96. |
The main cause of world population growth in 18th and 19th centuries was |
| A. | Decrease in birth rates |
| B. | Decrease in death rates |
| C. | Industrial revolution |
| D. | None of these |
| Answer» D. None of these | |
| 97. |
The basic requirements of human beings are provided by |
| A. | Industrialization |
| B. | Agriculture |
| C. | Nature |
| D. | Urbanization |
| Answer» D. Urbanization | |
| 98. |
A coal deposit that is not economical to mine today would be considered part of our ___________ |
| A. | Coal reserves |
| B. | Coal resources |
| C. | Coal reservoirs |
| D. | None of these |
| Answer» B. Coal resources | |
| 99. |
The main components of photochemical smog is |
| A. | Water vapors |
| B. | Nitrogen oxides |
| C. | Sulphur oxides |
| D. | All of the above |
| Answer» E. | |
| 100. |
Which of the following is not a potential adverse effect of global warming? |
| A. | More extreme weather patterns |
| B. | Retreat of glaciers |
| C. | Sea level rise |
| D. | An increase of UV-B radiation |
| Answer» E. | |