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Sunday, 18 February 2018

OPSC Answer Key 2018 | OPSC Answer Key of All Sets

  By GK Planet Team       Sunday, 18 February 2018

Download OPSC Solved Paper/ Answer Key 2018

Q.76) In a pond ecosystem, the BOD increases due to
a) Photosynthetic activity of algae
b) High density of aquatic macrophytes
c) High density of fish
d) Increase in the population of bacteria
Q77) Ozone layer in the stratosphere is affected by the increase in the atmospheric concentration of :
a) CO2
b) NH3
c) SO2
d) CFC
Q.78) Considering the global warming potential of CO2 as one, the global warming potential of CO2 as one, the global warming potential CH4 has been estimated to be approximate.
a) 12
b) 15
c) 21
d) 35
Q.79) The pollutants like phenol and mercury can be removed from water by :
a) Sedimentation
b) Electro-dialysis
c) Filtration
d) Biological oxidation
Q.80) The pollutant generated in high quantity by the thermal power plants is :
a) SO2
b) CO
c) NH3
d) Fly ash
Q.81) Which of the following cities is associated with organization of “Earth Summit”?
a) New Delhi
b) Geneva
c) Rio-de-Jeneior
d) Sydney
Q.82) LNG stands for :
a) Liquid Nitrogen Gas
b) Liquefied Nitrogen Gas
c) Liquid Neon Gas
d) Liquefied Natural Gas
Q.83) Kyoto Protocol was signed by member countries at Kyoto [Japan] in :
a) 1995
b) 1997
c) 1999
d) 2003
Q.84) The first nuclear reactor in India was built in the year 1956 . Its name was
a) Kamini
b) Rohini
c) Bhaskar
d) Apsara
Q.85) What is a biogas plant?
a) Digester
b) Aerobic digester
c) Anaerobic digester
d) Gassifier
Q.86) What for OTEC stands?
a) Odisha Thermal Energy Corporation
b) Ocean Temperature Energy Conversion
c) Ocean Thermal Energy Conversion
d) Organization of Thermal Energy Conversion
Q.87) Bronze is an alloy of :
a) Copper and Nickel
b) Copper and Iron
c) Copper and Tin
d) Copper and Aluminium
Q.88) Which of the following is an ore of iron?
a) Siderite
b) Malachite
c) Bauxite
d) Anglesite
Q.89) Silviculture is the :
a) Arts and Science of cultivating herbs
b) Art and Science of cultivating grasses
c) Art and Science of cultivating flowers
d) Art and Science of cultivating forest trees
Q.90) Arid Forest Research Institute [AFRI] is situated at :
a) Nagpur
b) Jodhpur
c) Kanpur
d) Fatehpur
Q.91) It is thought that dozens of ships and planes have disappeared under mysterious circumstances in the area of bad luck and extra terrestrial activity. This area is known as
a) Bermuda triangle
b) Cuba
c) Puerto Rico
d) Gulf of Mexico
Q.92) Bleaching powder used in Fish pond is working as :
a) Disinfectant
b) Sterelent
c) Snail Controller
d) Parasticide
a) Motorised boats
b) Wooden boats
c) Devices used to catch prawn and lobsters such as nets , traps, hooks and even hands
d) None
Q.94) The approximate life time of a common electric bulb is 1,000 hrs whereas the approximate life time of a LED bulb is :
a) 5,000 hrs
b) 10,000 hrs
c) 20,000 hrs
d) 50,000 hrs
Q.95) The safe threshold limit of CO2 concentration in the atmosphere in ppm is :
a) 350
b) 600
c) 800
d) 1000
Q.96) The detection of gravitational wave on 14th September , 2015 by the LIGO collaboration from the merger of two black holes , is the first direct detection of gravitational waves and the first observation of a binary black hole merger. This provides evidence for :
a) Arrhenius theory of electrolytic dissociation
b) Einstein’s general theory of relativity
c) Newton’s law of gravity
d) Theory of black body radiation
Q.97) What is a syngas?
a) It s a gas mixture of CO, H2, CO2 and N2
b) It is a gas mixture of CH4, O2 and CO
c) It is a gas mixture of CH4, CO2, N2, H2 and O2
d) It is a gas mixture of H2 and O2
Q.98) Which Committee has been constituted by the Union Government to continuously monitor the solutions to air pollution?
a) Bhure Lal Committee
b) Sunita Narain Committee
c) C. K. Mishra Committee
d) Harsha Vardhan Committee
Q.99) The two major functional components of any ecosystem are :
a) Energy flow and producers
b) Nutrients cycling and energy flow
c) Energy flow and decomposer population
d) Consumers and energy flow

Q.100) Extinct, critically endangered and vulnerable are the categories assigned to the species by :
a) UNO
b) IUCN
c) FAO
d) UNEP
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