Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 19

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Questions
1 Thermal stratification of aquatic ecosystems takes place in
1 tropical lakes
2 temperate lakes
3 glacier lakes
4 meandering rivers

Answer: temperate lakes
2 The scale length of pressure variations in atmosphere in vertical direction is about
1 3 km
2 4.8 km
3 7 km
4 12 km

Answer: 7 km
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3 Which radioactive element is considered as an indoor pollutant ?
1 Oxygen – 18
2 Nitrogen – 15
3 Carbon – 13
4 Radon

Answer: Radon
4 In a closed thermodynamic system, across its boundaries
1 no transfer of heat is possible.
2 no transfer of work is possible
3 transfer of heat is possible but not of work.
4 transfer of heat and work is possible.

Answer: transfer of heat and work is possible.
5 In an urban area, moist air at 27 C has a mixing ratio of 50 gm per kg. Its virtual temperature is
1 33.69 C
2 38.15 C
3 36.15 C
4 32.30 C

Answer: 36.15 C
6 Under aerobic biodegradation of DDT, which of the following compound is formed ?
1 DDD
2 DDE
3 DDN
4 DDS

Answer: DDS
7 Among the following heavy metals, which has highest concentration in earth’s crust ?
1 Chromium
2 Copper
3 Nickel
4 Zinc

Answer: Copper
8 Composition-wise halons are related to
1 CFCs
2 Halides
3 Hydrocarbons
4 Peptides

Answer: CFCs
9 Which of the following gases has highest absorption co-efficient for solubility in water ?
1 Hydrogen
2 Nitrogen
3 Oxygen
4 Carbon dioxide

Answer: Carbon dioxide
10 Quantity of glucose (MW 180) required to prepare 1000 ml of 5% solution is
1 5 g
2 50 g
3 900 g
4 9000 g

Answer: 9000 g
11 Endemic species are
1 Uniformly distributed across the landscape
2 Widely distributed
3 Restricted to a particular area
4 Continuously distributed globally

Answer: Restricted to a particular area
12 Which of the following is the in-situ biodiversity conservation site ?
1 Arboretum
2 Botanical garden
3 Biosphere reserve
4 Orchidarium

Answer: Biosphere reserve
13 The largest unit of climax communities representing well defined climatic zone is referred to as
1 Biosphere
2 Biome
3 Biota
4 Landscape

Answer: Biome
14 An active, adaptive control process which is able to maintain the overall balance is known as
1 Bohr’s Hypothesis
2 Miller Hypothesis
3 Gaia Hypothesis
4 Kepler’s Law

Answer: Gaia Hypothesis
15 Niche of an organism is
1 Address
2 Profession
3 Address
4 Range

Answer: Profession

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