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160+ Environmental Science Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Science in Environmental Science (BSC es) .

51.

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» B. Sulphur into air
52.

A poisonous gas given out of a vehicle exhaust is

A. Methane
B. Ethane
C. Carbon dioxide
D. Carbon monoxide
Answer» D. Carbon monoxide
53.

The purest form of coal is

A. Anthracite
B. Lignite
C. Peat
D. Bitumen
Answer» C. Peat
54.

Which one of the following is used as a refrigerant?

A. Freon
B. Teflon
C. Ethanol
D. Benzol
Answer» A. Freon
55.

Loss of forest has led to

A. Erosion of fertile soil
B. Global warming
C. Loss of habitat of plants and animals
D. All of the above
Answer» D. All of the above
56.

What are the consequences of excessive mining in an area?

A. Air and water pollution
B. Deforestation
C. Migration of large numbers of population
D. All of the above
Answer» D. All of the above
57.

Resources which are directly derived from nature are referred to as

A. Organic resources
B. Natural resources
C. Manmade resources
D. None of the above
Answer» B. Natural resources
58.

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» D. Inexhaustible resource
59.

The fossil fuel that is derived from the dead remains of plants that grew some 250 million years ago is

A. Petroleum
B. Natural gas
C. Coal
D. LPG
Answer» C. Coal
60.

A resource that cannot be replaced in a reasonably short time is usually referred to as

A. Renewable
B. Non-renewable
C. Natural
D. Man made
Answer» B. Non-renewable
61.

Manmade resources are alternative to natural resources for a variety of reasons. Which of these would not be one of those?

A. They increase variety and choice
B. They are cheaper to produce than natural resources
C. They are made from renewable resources
D. They are better suited for the purpose for which they will be used
Answer» C. They are made from renewable resources
62.

Which of these is not a fossil fuel?

A. Coal
B. Oil
C. Natural gas
D. Uranium
Answer» D. Uranium
63.

A liquid fuel that was formed from the ancient remains of sea plants and animals is

A. Natural gas
B. Petroleum
C. Geothermal energy
D. Coal
Answer» B. Petroleum
64.

Energy in the rays from the sun is called

A. Solar energy
B. Wind energy
C. Tidal energy
D. Water energy
Answer» A. Solar energy
65.

Which is a list of renewable resources?

A. Petroleum, geothermal, wind
B. Biomass, geothermal, hydropower
C. Natural gas, wind, biomass
D. Hydropower, solar, wind energy
Answer» D. Hydropower, solar, wind energy
66.

Energy from the heat inside the earth is

A. Natural gas
B. Geothermal
C. Petroleum
D. Terrathermal
Answer» B. Geothermal
67.

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» A. Coal reserves
68.

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» D. All of the above
69.

The process of restoring forests that once existed but was removed at some time in the past is known as

A. Afforestation
B. Reforestation
C. Deforestation
D. None of these
Answer» B. Reforestation
70.

Red data book contains data of

A. All plant species
B. All animal species
C. Threatened species
D. Economically important species
Answer» C. Threatened species
71.

IUCN Headquarters is at

A. Morges, Switzerland
B. Paris, France
C. Vienna, Austria
D. New York, USA
Answer» A. Morges, Switzerland
72.

Which of the following regions has the maximum diversity?

A. Mangroves
B. Temperate forest
C. Taiga
D. Coral reefs
Answer» D. Coral reefs
73.

The most important reason for decrease in biodiversity is

A. Habitat pollution
B. Over exploitation
C. Habitat destruction
D. Introduction of exotic species
Answer» C. Habitat destruction
74.

Dodo is

A. Endangered species
B. Rare species
C. Extinct species
D. Exotic species
Answer» C. Extinct species
75.

Blue whale is placed under

A. Endangered
B. Rare
C. Extinct
D. Exotic
Answer» A. Endangered
76.

Conservation within the natural habitat is

A. Ex-situ conservation
B. In-situ conservation
C. Ex-vivo conservation
D. In-vivo conservation
Answer» B. In-situ conservation
77.

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» A. Zoo
78.

Ex-situ conservation includes

A. Zoo
B. Botanical Garden
C. Germplasm Bank
D. All of the above
Answer» D. All of the above
79.

Hotspots are regions of high

A. Rareism
B. Endemism
C. Diversity
D. Critically endangered population
Answer» C. Diversity
80.

Endemic species are

A. Rare species
B. Species localized in a specific region
C. Cosmopolitan in distribution
D. None of these
Answer» B. Species localized in a specific region
81.

Which one of the following has the maximum genetic diversity in India?

A. Tea
B. Teak
C. Mango
D. Wheat
Answer» C. Mango
82.

Which one of the following regions in India is a hotspot of biodiversity?

A. Sundarbans
B. Western Ghats
C. Eastern Ghats
D. Gangetic plains
Answer» B. Western Ghats
83.

Darwin’s finches are a good example of

A. Convergent evolution
B. Adaptive radiation
C. Connecting link
D. Industrial melanism
Answer» B. Adaptive radiation
84.

Which group of vertebrates comprises of highest number of species

A. Mammals
B. Fishes
C. Reptiles
D. Birds
Answer» B. Fishes
85.

5th June is observed as

A. World environment day
B. World forest day
C. World population day
D. World wildlife day
Answer» A. World environment day
86.

The unfavorable alteration of environment by human activities is termed as

A. Ecological disturbance
B. Ecological degradation
C. Pollution
D. Catastrophe
Answer» B. Ecological degradation
87.

Biogas contains mainly

A. Carbon dioxide
B. Methane
C. Butane
D. Propane
Answer» B. Methane
88.

Main source of acid rain is

A. Sulphur dioxide
B. Nitrogen
C. Carbon dioxide
D. Carbon monoxide
Answer» A. Sulphur dioxide
89.

Treated water can be disinfected by adding

A. Alum
B. Fluorine
C. Chlorine
D. Oxygen
Answer» C. Chlorine
90.

The burning of fossil fuels releases large amount of

A. Nitrogen
B. Sulphur
C. Carbon
D. Hydrogen
Answer» B. Sulphur
91.

Which of the following does not causes air pollution when used for heating purposes

A. Coal
B. Petrol
C. Kerosene
D. Solar energy
Answer» D. Solar energy
92.

A pH of rainwater is

A. 5-6
B. 6-7
C. 7-8
D. 8-9
Answer» A. 5-6
93.

A poisonous gas given out of vehicles exhaust is

A. Carbon monoxide
B. Ethane
C. Methane
D. Carbon dioxide
Answer» A. Carbon monoxide
94.

A common bactericide used in swimming pools is

A. Chlorine
B. Alum
C. Borax
D. DDT
Answer» A. Chlorine
95.

Greenhouse effect is linked to

A. Nitrogen oxides
B. Sulphur dioxides
C. Carbon dioxides
D. Carbon monoxides
Answer» C. Carbon dioxides
96.

Disposable glasses and plates are made up of

A. PVC
B. Polystyrene
C. Polyvinyl alcohol
D. Polypropylene
Answer» D. Polypropylene
97.

Aerosols consisting of solid particles produced by combustion

A. Fog
B. Smog
C. Smoke
D. None of these
Answer» B. Smog
98.

Which of the following are consequences of ozone depletion

A. Skin cancer and cataract
B. Reduced growth in plants
C. Shortening of zooplanktons and their breeding period
D. All of the above
Answer» A. Skin cancer and cataract
99.

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» D. All of the above
100.

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» B. Thermal pollution

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