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WBCS 2019 — Environment Questions with Answers

All 48 Environment previous-year questions from WBCS 2019, each with the correct answer and a full explanation. Practise them as a free, timed mock test with instant scoring.

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Q1.Biodiversity
What is 'Arribada'?
- a)Mass Nestling of Olive Ridley
- b)Setting up a habitat by Red Panda
- c)Colony formation by Penguin
- d)None of the above
Q2.Ecology
Where is the shoal grassland found in India?
- a)Western Ghats
- b)Sundarban
- c)Andaman-Nicobar
- d)Himalayas
Q3.Climate Change
Which of the following two countries named the first and second best performing country after the Climate-Change Performance Index, 2019?
- a)Norway and Iceland
- b)Sweden and Bhutan
- c)Bhutan and Finland
- d)Sweden and Morocco
Q4.Biodiversity
Which of the Indian Lake possess 20% of India's sea-grass distribution?
- a)Chilka Lake
- b)Loktak Lake
- c)Dal Lake
- d)Mansar Lake
Q5.Conservation & Protected Areas
The fresh water percentage of Earth is
- a)1%
- b)2.5%
- c)5%
- d)10%
Q6.Conservation & Protected Areas
The Disaster Management Act was enacted in
- a)2000
- b)2003
- c)2005
- d)2010
Q7.Climate Change
The maximum width of tropopause is
- a)10 Km
- b)15 Km
- c)20 Km
- d)25 Km
Q8.Climate Change
The Thermosphere starts from Earth's surface at a distance of
- a)80 Km
- b)85 Km
- c)100 Km
- d)125 Km
Q9.Pollution
The following bacteria may be used to mitigate oil spill:
- a)Bacillus
- b)Pseudomonas
- c)E. coli
- d)Nitrobacter
Q10.Pollution
The temperature of water for measuring BOD should be maintained at
- a)20°C
- b)30°C
- c)35°C
- d)40°C
Q11.Conservation & Protected Areas
Silent Valley became national park in the year
- a)1980
- b)1984
- c)1988
- d)1990
Q12.Pollution
The pH for drinking water should be between
- a)5 – 6
- b)6 – 6.5
- c)6.5 – 7.5
- d)8 – 9
Q13.Conservation & Protected Areas
The following name is associated with rain water harvesting:
- a)Rajendra Singh
- b)Baba Amte
- c)S. C. Nair
- d)Medha Patkar
Q14.Pollution
DDT does not contain
- a)C
- b)H
- c)P
- d)Cl
Q15.Pollution
The following gas may be involved in stone concer:
- a)N2
- b)SO2
- c)CO2
- d)H2S
Q16.Pollution
The black foot disease primarily occurs due to toxicity of
- a)Fluaride
- b)Cadmium
- c)Arsenic
- d)Lead
Q17.Pollution
Flouride in environment primarily comes from
- a)topaz
- b)apatite
- c)fluorite
- d)phosphorite
Q18.Ecology
The following is a sedentary cycle:
- a)P cycle
- b)N2 cycle
- c)C cycle
- d)O2 cycle
Q19.Ecology
Habitats resulting from lava flow is an example of
- a)primary succession
- b)secondary succession
- c)autogenic succession
- d)allogenic succession
Q20.Pollution
What is Incinerator?
- a)Furnace used for burning solid waste.
- b)Furnace used for treating liquid waste.
- c)Both (A) and (B)
- d)None of the above
Q21.Ecology
What is Plankton?
- a)Large plants in water.
- b)Microscopic floating organisms- Plants and animals.
- c)Bottom dwelling aquatic organisms
- d)None of the above
Q22.Ecology
Biotic environment includes
- a)Consumers
- b)Decomposers
- c)Producers
- d)All of the above
Q23.Ecology
An ecosystem consists of
- a)population.
- b)a biotic community.
- c)a population and its non-living elements.
- d)a biotic community and its non-living elements.
Q24.Ecology
Decomposers which specifically act on the fecal matter of other organisms are called
- a)Coprophagic
- b)Heterophagic
- c)Allophagic
- d)Paraphagic
Q25.Climate Change
Major cause of Ozone depletion is due to which chemical?
- a)Chloro Fluoro Carbons
- b)Polyphenols
- c)Dioxins
- d)Rayon
Q26.Pollution
Below, which of the following pH in rain regarded as 'acid rain'?
- a)7
- b)7.3
- c)5.6
- d)6
Q27.Pollution
Which of the following pollutant is the major contributor to photochemical smog?
- a)Peroxynitrates
- b)Hydroperoxides
- c)Nitrogen dioxide
- d)Ozone
Q28.Pollution
What is the primary standard level for carbon monoxide for assuring air quality?
- a)10 ppm
- b)90 ppm
- c)1 ppm
- d)9 ppm
Q29.Pollution
Which is the most abundant hydrocarbon in the atmosphere?
- a)Methane
- b)Carbonyl sulphide
- c)Ethane
- d)None of the above
Q30.Climate Change
Which is the most abundant greenhouse gas in the atmosphere?
- a)Carbon dioxide
- b)Water vapour
- c)Methane
- d)Nitrogen
Q31.Climate Change
Which of the following is the largest sink for carbon dioxide gas?
- a)Forests
- b)Oceans
- c)Ice sheets
- d)Grasslands
Q32.Pollution
Which of the following is a liquid form of aerosol?
- a)Fume
- b)Dust
- c)Mist
- d)Smoke
Q33.Ecology
The permanent decrease in population number occurs due to
- a)Migration
- b)Natality
- c)Emigration
- d)Mortality
Q34.Conservation & Protected Areas
Roof top water harvesting is highest in
- a)China
- b)Brazil
- c)Ghana
- d)India
Q35.Pollution
The noise level during plane take off is around
- a)100 dB
- b)150 dB
- c)200 dB
- d)250 dB
Q36.Conservation & Protected Areas
The Biodiversity Act was passed in
- a)2000
- b)2002
- c)2004
- d)2008
Q37.Pollution
Bengal Smoke Nuisance Act came up for the first time in
- a)1900
- b)1905
- c)1950
- d)1978
Q38.Conservation & Protected Areas
The green bench in Kolkata High Court was established in
- a)1990
- b)1996
- c)1997
- d)1998
Q39.Pollution
The electric arc furnace is used for recycling of
- a)Cu
- b)Zn
- c)Fe
- d)Cr
Q40.Conservation & Protected Areas
CITES became effective from the year
- a)1970
- b)1975
- c)1980
- d)1985
Q41.Pollution
The following waste comes under red category:
- a)metal
- b)drug
- c)oil waste
- d)food waste
Q42.Pollution
The ideal temperature for composting is
- a)30°C – 40°C
- b)40°C – 50°C
- c)50°C – 60°C
- d)60°C – 70°C
Q43.Pollution
The disinfection of drinking water by municipalities is mostly by
- a)Chlorination
- b)Bromination
- c)Boiling
- d)UV radiation
Q44.Pollution
The activated sludge treatment is carried out by
- a)high temperature
- b)acidification
- c)microbes
- d)moisture
Q45.Pollution
The country where paper recycling was initiated in the world is
- a)UK
- b)USA
- c)Germany
- d)France
Q46.Conservation & Protected Areas
Mulching prevents the loss of
- a)microbes
- b)moisture
- c)mineral
- d)organic matter
Q47.Conservation & Protected Areas
Indian Board of Wildlife was established in
- a)1932
- b)1952
- c)1962
- d)1972
Q48.Biodiversity
Bhagabatpur project is for breeding
- a)Marsh Crocodile
- b)Tigers
- c)Black buck
- d)Dholes

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