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Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 13

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(1) Which of the following chemicals of anthropogenic origin mimics the effect of estrogen in animals ?
(1) Alkyl phenol
(2) Polychlorinated biphenyl
(3) O, p - DDT
(4) All the above
Answer: All the above
(2) “Black Foot” disease in human beings caused due to use of water contaminated with
(1) Mercury
(2) Cadmium
(3) Silver
(4) Arsenic
Answer: Arsenic

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(3) Largest amount of fresh water is present in
(1) Lakes
(2) rivers
(3) Glaciers
(4) Polar Ice
Answer: Polar Ice
(4) A threatened species is
(1) only endangered species
(2) only vulnerable species
(3) only rare species
(4) all of the above
Answer: all of the above
(5) Mesoscale Meteorological Phenomena occur over areas of horizontal distance in the range (km)
(1) 100 – 200 km
(2) 1 – 10 km
(3) 1 – 100 km
(4) 10 – 50 km
Answer: 1 – 100 km
(6) The Indian monsoon period is from
(1) October to November
(2) December to February
(3) June to September
(4) March to May
Answer: June to September
(7) Which of the following is not a reactive oxygen species ?
(1) Hydrogen peroxide
(2) Hydroxyl ion
(3) Singlet oxygen
(4) Superoxide anion
Answer: Hydroxyl ion
(8) Azaridine,Ethylene dibromide, Bis(chloromethyl) ether are
(1) Alkylating agents
(2) Hydrocarbons
(3) Hydrazines
(4) Aromatic amines
Answer: Alkylating agents
(9) Normality of 0.25 M phosphoric acid is
(1) 0.25
(2) 0.50
(3) 0.75
(4) 2.50
Answer: 0.75
(10) The gaseous material which is used for the synthesis of Methyl isocyanate is
(1) Chloranil
(2) Sevin
(3) Phosgene
(4) Chlorine
Answer: Phosgene
(11) During the determination of COD, sulphanilic acid is added, because
(1) it maintains the acidic nature
(2) it precipitates the mercury ions
(3) it oxidises nitrites to nitrates
(4) it reacts with ferrous ammonium sulphate
Answer: it oxidises nitrites to nitrates
(12) Which year was declared as International Year of Biodiversity ?
(1) 2002
(2) 2010
(3) 2020
(4) 1972
Answer: 2010
(13) The forest biome characterised by 3-4 tree species/km2 is
(1) Tropical
(2) Temperate
(3) Boreal
(4) Taiga
Answer: Temperate
(14) Which of the following is a type of biodiversity extinction caused primarily due to anthropogenic activities ?
(1) Carboniferous rain forest collapse
(2) Permian – Triassic extinction.
(3) Cretaceous paleogene extinction
(4) Holocene extinction
Answer: Holocene extinction
(15) The chemical used in a fermenter with molasses as a substrate is
(1) Diammonium sulphate
(2) Diammonium phosphate
(3) Diammonium nitrate
(4) Diammonium chloride
Answer: Diammonium phosphate

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