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

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Questions
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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