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RPSC RAS Prelims mcq Practice SET for Students
In which year was the Environment (Protection) Act of India enacted?
a) 1981
b) 1986
c) 1995
d) 2000
Option b – 1986
The Environment Protection Act came into force in which year?
a) 1982
b) 1986
c) 1990
d) 1994
Option b – 1986
The term Environment refers to
a) The natural surroundings including land, water, air, plants, and animals
b) The overall conditions that influence human life at a specific time
c) A system formed by the interaction of physical, biological, and cultural elements
d) All of the above
Option d – All of the above
Which of the following is not directly associated with environmental conservation?
a) Sustainable development
b) Poverty reduction
c) Air conditioning
d) Use of paper bags
Option b – Poverty reduction
Environment represents a combined state of
a) Biotic components
b) Physiographic components
c) Abiotic components
d) All of the above
Option d – All of the above
Sustainable development emphasizes intergenerational responsibility in the use of
b) Material resources
c) Industrial resources
d) Social resources
Option a – Natural Resources
The Decade of Sustainable energy for All was launched by
a) United Nations
b) India
c) Germany
d) World Bank
Option a – United Nations
A nation’s natural capital consists of all the following except
a) Forests
b) Water resources
c) Roads
d) Minerals
Option c – Roads
World Environment Day is observed on
a) 1 December
b) 5 June
c) 14 November
d) 15 August
Option b – 5 June
Solar radiation plays a major role in the
a) Carbon cycle
b) Hydrogen cycle
c) Water cycle
d) Nitrogen cycle
Option c – Water cycle
The National Environmental Engineering Research Institute is situated in
a) Bangalore
b) Hyderabad
c) Nagpur
d) New Delhi
Option c – Nagpur
Which of the following is vital for achieving sustainable development?
a) Conservation of Biodiversity
b) Control and prevention of Pollution
c) Alleviation of poverty
d) All of the above
Option d – All of the above
The Rio+20 Declaration was titled
a) The Future We Want
b) The Future We Seek
c) The Future We Have
d) The Future We See
Option a – The Future We Want
The first Earth Summit took place at
a) Washington
b) Geneva
c) Rio de Janeiro
d) Buenos Aires
Option c – Rio de Janeiro
The international conference held at Rio de Janeiro in 1992 was known as
a) United Nations Conference on Sustainable Development
b) Environment and Pollution Summit
c) International New Economics Conference
d) None of the above
Option a – United Nations Conference on Sustainable Development
What is the thin blanket of gases enveloping the Earth known as?
a) Biosphere
b) Water particles
c) Atmosphere
d) Hydrosphere
Option c – Atmosphere
Air can best be described as a
a) Compound
b) Element
c) Mixture
d) Electrolyte
Option c – Mixture
What percentage of nitrogen is present in dry air?
a) 21%
b) 27%
c) 50%
d) 78%
Option d – 78%
Which concentration of carbon dioxide is considered ideal for maintaining atmospheric balance?
a) 0.02%
b) 0.03%
c) 0.04%
d) 0.05%
Option b – 0.03%
Which of the following noble gases is absent from the Atmosphere?
a) Helium
b) Argon
c) Radon
d) Neon
Option c – Radon
The gas with the highest proportion in the Atmosphere is
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Option c – Nitrogen
Which gas occurs in the greatest quantity in air?
a) Hydrogen
b) Carbon dioxide
c) Oxygen
d) Nitrogen
Option d – Nitrogen
If all plants and trees disappeared from the Earth, which gas would show a decline?
a) Carbon dioxide
b) Nitrogen
c) Water vapour
d) Oxygen
Option d – Oxygen
Which of the following approaches best supports eco-friendly and sustainable agricultural development in India?
a) Increasing cultivated area along with heavy use of chemical fertilizers and pesticides
b) Mass adoption of high-yield crop varieties with intensive irrigation and aerial application of agrochemicals
c) Practising mixed cropping, applying Organic manure, using nitrogen-fixing crops, and cultivating pest-resistant varieties
d) Relying on modern machinery, strong insecticides, and monoculture farming to cut post-harvest losses
Option c – Practising mixed cropping, applying Organic manure, using nitrogen-fixing crops, and cultivating pest-resistant varieties
Who is considered the originator of the concept of Natural Farming?
a) Masanobu Fukuoka
b) M. S. Randhawa
c) M. S. Swaminathan
d) Norman Borlaug
Option a – Masanobu Fukuoka
The idea of forming a “Green Army” for environmental protection was first implemented by which country?
a) Japan
b) China
c) Australia
d) Egypt
Option c – Australia
The National Green Tribunal Act, 2010 draws its constitutional basis from which of the following?
a) Recognition of a healthy Environment as part of the Right to Life under Article 21 only
b) Provisions related to financial assistance for Scheduled Areas and Scheduled Tribes only
c) Right to a healthy Environment and powers assigned to the Gram Sabha
d) All of the above
Option a – Recognition of a healthy Environment as part of the Right to Life under Article 21 only
Consider the following statements about the Sustainable Development Goals: a) They were initially proposed in 1972 by an international think tank known as the Club of Rome b) They are intended to be achieved by the year 2030. Which of the statements given above is/are correct?
a) Only the first statement
b) Only the second statement
c) Both statements
d) Neither statement
Option b – Only the second statement
With reference to Agenda 21, consider the following statements: a) It serves as a global framework for actions aimed at sustainable development b) It emerged from the World Summit on Sustainable Development held in Johannesburg in 2002. Which of the statements given above is/are correct?
a) Only the first statement
b) Only the second statement
c) Both statements
d) Neither statement
Option a – Only the first statement
Which of the following are linked to the maintenance of ecological balance?
a) Forest Policy and the Environment Protection Act
b) Environment Protection Act and Industrial Policy
c) Forest Policy, Environment Protection Act, and Industrial Policy
d) Forest Policy, Environment Protection Act, Industrial Policy, and Educational Policy
Option d – Forest Policy, Environment Protection Act, Industrial Policy, and Educational Policy
Consider the following Assertion and Reason: Assertion: Natural Vegetation serves as a dependable indicator of Climate. Reason: Plants that require large amounts of water are commonly found in regions with humid climatic conditions. Which of the following is correct?
a) Both the Assertion and the Reason are true, and the Reason correctly explains the Assertion
b) Both the Assertion and the Reason are true, but the Reason does not explain the Assertion
c) The Assertion is true, but the Reason is false
d) The Assertion is false, but the Reason is true
Option a – Both the Assertion and the Reason are true, and the Reason correctly explains the Assertion
Which of the following processes add carbon dioxide to the Earth’s carbon cycle?
a) Photosynthesis and volcanic activity
b) Respiration and decomposition of Organic Matter
c) Respiration, decomposition of Organic Matter, and volcanic activity
d) All of the above
Option c – Respiration, decomposition of Organic Matter, and volcanic activity
Which of the following statements about an ecosystem is incorrect?
a) It consists of Living Organisms along with the physical environment in a specific area
b) It operates as a functional unit
c) It possesses its own productivity
d) It functions as a completely closed system
Option d – It functions as a completely closed system
Which option most accurately defines an ecosystem?
a) A collection of Organisms interacting with one another
b) The portion of the Earth inhabited by Living Organisms
c) A community of Organisms together with their surrounding environment
d) The plants and animals found in a particular geographical region
Option c – A community of Organisms together with their surrounding environment
Ecology deals with the study of relationships between ( RPSC RAS Prelims mcq Practice SET )
a) Living Organisms and their environment
b) Humans and forests
c) Soil and water
d) Social interactions
The concept of the ecosystem was introduced by ( RPSC RAS Prelims mcq Practice SET )
a) G. Taylor
b) E. Hartigan
c) D. R. Stoddart
d) Tansley
Option d – Tansley
Which of the following is an example of an artificial ecosystem? ( RPSC RAS Prelims mcq Practice SET )
a) Pond
b) Field
c) Forest
d) None of these
Option b – Field
Which of the following represents an artificial ecosystem? ( RPSC RAS Prelims mcq Practice SET )
a) Rice field
b) Forest
c) Grassland
d) Lake
Option a – Rice field
The highest number of Organisms that an environment can support over time is referred to as ( RPSC RAS Prelims mcq Practice SET )
a) Population
b) Carrying capacity
c) Pyramid of numbers or biomass
d) None of the above
Option b – Carrying capacity
Which of the following statements is correct? ( RPSC RAS Prelims mcq Practice SET )
a) energy movement in the biosphere takes place in a single direction
b) energy circulation in the biosphere is cyclic
c) Loss of energy in ecosystems reduces at higher trophic levels
d) Organisms occupying higher trophic levels utilize energy more efficiently
Option a – energy movement in the biosphere takes place in a single direction
What is the standard unit for measuring an ecological footprint? ( RPSC RAS Prelims mcq Practice SET )
a) Global hectares
b) Nanometre
c) Hoppus cubic foot
d) Cubic ton
Option a – Global hectares
The smallest area of land needed to sustain an individual’s life completely is called ( RPSC RAS Prelims MCQ Practice Set )
a) Biota
b) Ecological footprint
c) Biome
d) Niche
Option b – Ecological footprint
Who introduced the term “Deep Ecology”? ( RPSC RAS Prelims MCQ Practice Set )
a) E. P. Odum
b) C. Raunkiaer
c) F. E. Clements
d) Arne Naess
Option d – Arne Naess
The idea of an ecological niche was first proposed by ( RPSC RAS Prelims MCQ Practice Set )
a) Grinnell
b) Darwin
c) E. P. Odum
d) C. C. Park
Option a – Grinnell
In the Millennium Ecosystem Assessment, which of the following is classified as a supporting ecosystem service? ( RPSC RAS Prelims MCQ Practice Set )
a) Supply of Food and water
b) Regulation of Climate and Disease
c) Nutrient cycling and pollination
d) Protection of Biodiversity
Option c – Nutrient cycling and pollination
Which of the following shows the correct order in a Food chain? ( RPSC RAS Prelims MCQ Practice Set )
a) Diatoms → Crustaceans → Herrings
b) Crustaceans → Diatoms → Herrings
c) Diatoms → Herrings → Crustaceans
d) Crustaceans → Herrings → Diatoms
Option a – Diatoms → Crustaceans → Herrings
Which term denotes a density gradient in a water body? ( RPSC RAS Prelims MCQ Practice Set )
a) Ecocline
b) Halocline
c) Pycnocline
d) Thermocline
Option c – Pycnocline
In grassland ecosystems, trees fail to replace grasses during succession mainly because of ( RPSC RAS Prelims MCQ Practice Set )
a) Activity of insects and fungi
b) Insufficient sunlight and nutrients
c) Limited water availability and frequent fires
d) None of the above
Option c – Limited water availability and frequent fires
Which sequence correctly represents the stages of biotic succession? ( RPSC RAS Prelims MCQ Practice Set )
a) Nudation → Migration → Ecesis → Reaction → Stabilization
b) Migration → Nudation → Ecesis → Reaction → Stabilization
c) Ecesis → Migration → Nudation → Reaction → Stabilization
d) Stabilization → Reaction → Nudation → Migration → Ecesis
Option a – Nudation → Migration → Ecesis → Reaction → Stabilization
What is the correct hierarchy of biological organization from organism to biosphere? ( RPSC RAS Prelims MCQ Practice Set )
a) Population → Ecosystem → Community → Landscape
b) Landscape → Community → Ecosystem → Population
c) Population → Community → Ecosystem → Landscape
d) Population → Landscape → Community → Ecosystem
Option c – Population → Community → Ecosystem → Landscape
Consider the following statements related to ecosystems: a) The concept of ecosystem was introduced by A. G. Tansley b) Organisms capable of making their own Food are called autotrophs c) Consumers obtain Food through photosynthesis d) Decomposers transform Inorganic Matter into Organic Matter. Which of the statements given above are correct? ( RPSC RAS Prelims MCQ Practice Set )
a) Only a and b
b) Only a and c
c) Only b and d
d) Only c and d
Option a – Only a and b
Which of the following statements best describes bionomics? ( RPSC RAS Prelims MCQ Practice Set )
a) It refers to the management of life
b) It is another name for Ecology
c) It highlights how natural systems influence human systems
d) All of the above
Option c – It highlights how natural systems influence human systems
Marine upwelling regions show high productivity because they bring which of the following to the surface? ( RPSC RAS Prelims MCQ Practice Set )
a) Decomposer organisms
b) Nutrients
c) Organisms from the ocean floor
d) Nutrients only
Option b – Nutrients
With reference to Eco-Sensitive Zones, which statement is correct? ( RPSC RAS Prelims MCQ Practice Set )
a) They are notified under the Wildlife Protection Act
b) All human activities are banned except Agriculture
c) Both statements are correct
d) Neither statement is correct
Option d – Neither statement is correct
In ecosystem Food chains, decomposers are mainly ( RPSC RAS Prelims MCQ Practice Set )
a) Viruses
b) Fungi
c) Bacteria
d) Fungi and bacteria
Option d – Fungi and bacteria
Which of the following organisms are primary consumers? ( RPSC RAS Prelims MCQ Practice Set )
a) Ants and deer
b) Deer and fox
c) Ants, deer, and fox
d) Deer, fox, and tiger
Option a – Ants and deer
With reference to Food chains, consider the following statements: a) A Food chain depicts the feeding relationship among organisms b) Food chains exist only within populations of a single species c) A Food chain indicates the number of organisms consumed. Which of the statements given above is/are correct? ( RPSC RAS Prelims MCQ Practice Set )
a) Only a
b) a and b
c) a, b, and c
d) None of the above
Option a – Only a
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