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UGC NET Environmental Science Exam - English

Duration: 180 ยท Questions: 150 ยท Max Marks: 150 ยท Language: 1

View NTA UGC NET Environmental Science 2026 Exam Page

Teaching and Research Aptitude

1
Which of the following is/are the basic paradigms in classroom teaching?
  1. A.Learning paradigm                               
  2. B.Instructional paradigm
  3. C.Both (a) and (b)   
  4. D.None of the above
2
The prime requirement to become a good teacher is to have
  1. A.Genuine interest in teaching
  2. B.Knowledge about controlling students
  3. C.Subject knowledge
  4. D.Good expression
3
Which of the following statement/s is/are NOT true ?
  1. A.Teaching is just an art
  2. B.Teachers can be trained only
  3. C.Teachers are born
  4. D.All of the above
4
The most desirable skill of teacher is to
  1. A.Make the students understand what the teacher says
  2. B.Cover the prescribed course
  3. C.Keep students relaxed while teaching
  4. D.Keep higher authorities informed about the class activities
5
Match List I with List II
List I (Level of teaching)                           List II (Main Proponent)
A Memory Level                                           I Herbart
B Understanding Level                               II Morrison
C Reflective Level                                         III Hunt
Codes:
  1. A.A-I, B-II, C-II
  2. B.A-l, B-III, C-II
  3. C.A-II, B-III, C-I
  4. D.รขโ‚ฌโ€นA-II, B-II, C-II
6
Which of the following statements is true?
  1. A.Computer aided education can replace a teacher
  2. B.Computer aided education can assist a teacher
  3. C.On-line teaching and face-to-face teaching both are effective
  4. D.Face-to-face teaching is less effective than online teaching
7
In order to solve the problem of aimlessness in education, we should develop -
  1. A.democratic citizenship   
  2. B.centralized education
  3. C.education
  4. D.reform the administrative set-up
8
If a student misbehaves with other students in the class, the teacher should -
  1. A.report the matter to the parents
  2. B.punish him at the time of the morning assembly in the school
  3. C.deal with him with sympathetic understanding
  4. D.treat him with sympathy and understanding
9
How can a failed student be encouraged to study sincerely in the same class?
  1. A. by teacher’s counseling
  2. B.by psychological counseling
  3. C.by guardian’s counseling
  4. D.by Students’ Association
10
Our examination system is -
  1. A.defective                                               
  2. B.without any defect
  3. C.in the interest of the students           
  4. D. well-planned
11
A suitable title for the passage could be
  1. A.Elements of Patriotism
  2. B.Historical Development of a Nation
  3. C.The Role of Religion and History in Patriotism
  4. D.Religion and Patriotism
12
Describing the element of worship ‘open the attack,’ the author implies that it
  1. A.is unnecessary
  2. B.leads no national sacrifice
  3. C.has no historical basis
  4. D.cannot be justified on rational ground
13
The tone of the passage can be best described as:
  1. A.critical
  2. B.descriptive
  3. C.persuasive
  4. D.analytical
14
Which is the main objective of research?
  1. A.To review the literature
  2. B.To summarize what is already known
  3. C.To get an academic degree
  4. D.To discover new facts or to make fresh interpretation of known facts
15
Sampling error decreases with the
  1. A.decrease in sample size
  2. B.increase in sample size
  3. C.process of randomization
  4. D.process of analysis
16
The principles of fundamental research are used in
  1. A.action research
  2. B.applied research
  3. C.philosophical research
  4. D.historical research
17
Users who use media for their own ends are indentified as
  1. A.Passive audience
  2. B.Active audience
  3. C.Positive audience
  4. D.Negative audience
18
Classroom communication can be described as
  1. A.Exploration
  2. B.Institutionalisation
  3. C.Unsignified narration
  4. D.Discourse
19
Marble stone used for the construction of the Taj Mahal was brought from the ancestral domain of Raja Jai Singh. The name of the place where mines of  marble is
  1. A.Burhanpur
  2. B.Makrana
  3. C.Amber
  4. D.Jaipur
20
The popular name of Taj Mahal was given by
  1. A.Shah Jahan
  2. B.Tourists
  3. C.Public
  4. D.European travelers
21
What is the main idea of this passage?
  1. A.The benefits of social media for global communication
  2. B.The challenges posed by the rapid advancement of technology on communication
  3. C.The importance of social media platforms in connecting people
  4. D.The necessity of critical thinking and media literacy in the digital age
22
According to the passage, what is a challenge of increased technological interconnectedness?
  1. A.Slower rates of communication
  2. B.Difficulty in sharing information
  3. C.The rapid spread of misinformation
  4. D.A decrease in global interaction
23
The word "discern" in the passage most closely means:
  1. A.Ignore
  2. B.Understand
  3. C.Distribute
  4. D.Create
24
What can be inferred about the impact of misinformation?
  1. A.It has no effect on public opinion
  2. B.Its impact is limited to online discussions
  3. C.It can influence public opinion and real-world events
  4. D.It is easily controlled by social media platforms
25
The author's tone in this passage can be best described as:
  1. A.Optimistic
  2. B.Neutral and informative
  3. C.Highly critical
  4. D.Humorous
26
Identify the fallacy in the following argument: "Alan is tall, dark and handsome and has blue eyes. Bill is also tall, dark and handsome".
  1. A.Inconsistency
  2. B.Weak analogy
  3. C.Slippery slope
  4. D.Hasty generalisation
27
According to Jaina philosophy, which among the following is not a form of indirect knowledge.
  1. A.Smrti
  2. B.Pratyabhijna
  3. C.Tarka
  4. D.Naya
28
Suppose a man swims 12 km upstream and 20 km down stream in a river in 4 hours. If he swims 18 km upstream and 10 km downstream also in 4 hours, then the speed at which he swims in the still water is.
  1. A.4 km/h
  2. B.6 km/h
  3. C.8 km/h
  4. D.10 km/h
29
Identify the number that occurs in the series 2, 10, 30, 68, 130, ....
(A)738
(B) 349
(C) 520
(D) 222
Choose the correct answer from the options given below:
  1. A.A, B and C only
  2. B.B, C and D only
  3. C.A, C and D only
  4. D.A, B and D only
30
Arrange the following gases in the ascending order of their global warning potential (GWD):
(A) CO2
(B) CH
(C) SF
(D) CFC-11
(E) N2O
Choose the correct answer from the options given below:
  1. A.(A), (B), (C), (E), (D)
  2. B.(A), (B), (E), (D), (C)
  3. C.(B), (C), (A), (E), (D)
  4. D.(A), (E), (B), (D), (C)
31
Who sends what to whom in a communication process?
(A) Channel sends the message to sender
(B) Sender sends messages to receiver
(C) Sender sends the feedback to receiver
(D) Receiver sends messages to sender
Choose the correct answer from the options given below:
  1. A.A only
  2. B.A and D only
  3. C.B only
  4. D.B and C only
32
Which of the following are essential requirements for the formation of photochemical SMOG?
(A) Carbon monooxide (CO)
(B) Nitrogen dioxide (NO2)
(C) Carbon dioxide (CO2)
(D) Volatile Organic Compounds (VOCs)
(E) Sunlight
Choose the most appropriate answer from the options given below:
  1. A.A, B and D only
  2. B.A, C and E only
  3. C.B, C, D and E only
  4. D.B, D and E only
33
Which fallacy is committed in the following statement?
"People with cases of flu should be kept in quarantine, because it has never been disproven as the best means of keeping the disease from spreading."
  1. A.Appeal to ignorance
  2. B.Hasty generalisation
  3. C.Slippery slope
  4. D.False cause
34
Match List I with List II.
LISTI (Ancient Treatises)                          LIST II (Author)
A. Lilavati                                                   I. Chanakya
B. Yoga-Sutras                                          II. Gautam
C. Nyaya-Sutras                                       III. Patanjali
D. Arthashastra                                        IV. Bhaskaracharya
Choose the correct answer from the options given below:
  1. A.A-IV, B-III, C-II, D-I
  2. B.A-III, B-IV, C-II, D-I
  3. C.A-IV, B-III, C-I, D-II
  4. D.A-I, B-III, C-II, D-IV
35
Which of the following Indian universities were modelled on the lines of University of London?
(A) Calcutta
(B) Bombay
(C) Madras
(D) Andhra
(E) Mysore
Choose the correct answer from the options given below:
  1. A.A, B & C only
  2. B.B, C & D only
  3. C.C, D & E only
  4. D.A, B & D only
36
Identify the correct order of the term A-E to complete the following paragraph about computer devices and technology. An ________ allows a user to write on a surface using a pen, and the text and drawings can then be captured and stored for later use. An ________ printer produces a hard copy of a document using and piezoelectric technology. A printer uses a drum, and positive and negative charges, to produce a _____ hard copy of a document.
(A) inkjet
(B) interactive whiteboard
(C) laser
(D) rotating
(E) thermal bubble
Choose the correct answer from the options given below:
  1. A.B, E, A, D, C
  2. B.B, A, E, C, D
  3. C.A, B, E, C, D
  4. D.E, D, C, B, A
37
Given below are two statements:
Statement I: Kyoto protocol only binds developed countries and places heavier burden on them
Statement II: Kyoto protocol has nothing to do with United Nations Framework Convention on climate change (UNFCCC)
In light of the above statements, choose the most appropriate answer from the options given below:
  1. A.Both Statement I and Statement II are true
  2. B.Both Statement I and Statement II are false
  3. C.Statement I is true but Statement II is false
  4. D.Statement I is false but Statement II is true
38
Consider the following letter series AA, BD, CI, DP,?, ...
The next term (?) in the series is
  1. A.ES
  2. B.EV
  3. C.EY
  4. D.EB
39
Given below are two statements:
Statement I: Internet is commonly used service on the World Wide Web
Statement II: HTTP is the protocol that web browsers and web servers use to communicate with each other over the Internet
In the light of the above statements, choose the correct answer from the options given below:
  1. A.Both Statement I and Statement II are true
  2. B.Both Statement I and Statement II are false
  3. C.Statement I is true but Statement II is false
  4. D.Statement I is false but Statement II is true
40
Negative communicators usually express
(A) Verbal softness
(B) Optimism
(C) Pessimism
(D) Resentment
(E) Distrust
Choose the correct answer from the options given below:
  1. A.A, B & C only
  2. B.B, C & D only
  3. C.C, D & E only
  4. D.A, B & E only
41
method of Identify the correct order of the term A-E given below that completes the paragraph describing a operation for a keyboard.
A computer keyboard has a key matrix underneath the keys when a key is pressed, it presses a switchthat completes a ___________. This allows __________ to follow. The location of the key pressed is ______. The location of the key pressed is compared to a ________ map to find the _________ value for the key that has been pressed.
(A) Binary
(B) Calculated
(C) Character
(D) Circuit
(E) Current
Choose the correct answer from the options given below:
  1. A.E, D, B, C & A
  2. B.D, E, B, C & A
  3. C.C, D, B, E & A
  4. D.A, E, B, C & D
42
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A): Teachers must encourage students to ask questions.
Reason (R): Asking questions can create curiosity and develop passion for learning
In light of the above statements, choose the most appropriate answer from the options given below
Choose the correct answer from below:
  1. A.Both (A) and (R) are correct, and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are correct, but (R) is not the correct explanation of (A)
  3. C.(A) is correct but (R) is not correct
  4. D.(A) is not correct but (R) is correct
43
The advantages of research based on field experiments are:
A. A strong external validity
B. Subjects behave normally and naturally
C. The experiment takes place in a natural setting
D. Generation of primary data
E. Non-requirement of elaborate logistics
Choose the correct answer from the options given below:
  1. A.A, B and C only
  2. B.B, C and D only
  3. C.C, D and E only
  4. D.A, C and E only
44
Effective classroom communication will enable
A. Efficient teaching
B. Interest in learning
C. Minimal assessment
D. Interaction between teacher and students
E. Teacher-centric behaviour
Choose the correct answer given below:
  1. A.A, B and C only
  2. B.B, C, D and D only
  3. C.C, D and E only
  4. D.A, B and D only
45
Given below are two statements:
Statement I: Exploration is particularly useful when researchers lack a clear idea of the problems they will meet during the study
Statement II: Through exploration, researchers develop concepts more clearly, establish priorities, develop operational definitions, and improve the final research design
In light of the above statements, choose the correct answer from the options given below:
  1. A.Both Statement I and Statement II are false
  2. B.Both Statement I and Statement II are true
  3. C.Statement I is false but Statement II is true
  4. D.Statement I is true but Statement II is false
46
In order to transform the regulatory system of Higher Education, the NEP proposes to set up HECI (Higher Education Commission of India). Which of the following are verticals of HECI?
A. NHERC
B. NAS
C. HEGC
D. NCIVE
E. NAC
Choose the correct answer from the options given below:
  1. A.A, B and C only
  2. B.A, C and E only
  3. C.B, C and E only
  4. D.C, D and E only
47
Some of the types of hypothesis are as follows:
A. Descriptive
B. Null
C. Confounding
D. Intervening
E. Explanatory (Causal)
Choose the correct answer from the options given below:
  1. A.A, B and D only
  2. B.A, B and E only
  3. C.A, B and C only
  4. D.B, C and D only
48
Which of the given learner characteristics are associated with field dependent (holistic/visual) learning style?
(i) Focusing on facts and principles
(ii) Relating concepts to personal experience
(iii) Formal interaction with teacher related to tasks at hand
(iv) Preferring to compete rather than cooperate
(v) Preferring to cooperate rather than compete
(vi) Perceiving global aspects of concepts and materials
Choose the correct answer from the options given below:
  1. A.(i), (ii) and (iii)
  2. B.(ii), (iii) and (v)
  3. C.(ii), (v) and (vi)
  4. D.(iv), (v) and (vi)
49
Which of the following potential factors affecting teaching are related to instructional facilities and learning environment?
(i) Praise and encouragement by teachers
(ii) Non availability of textbooks/reading materials for use
(iii) Proactive moves in the interactive processes
(iv) Shortage of highly qualified teachers
(v) Availability of smart classes
Choose the correct answer from the following options:
  1. A.(i), (ii) and (iii)
  2. B.(ii), (iii) and (v)
  3. C.(i), (iv) and (v)
  4. D.(iii), (iv) and (v)
50
Identify the qualitative research designs from the list given below:
(i) Exploring common experiences of individuals to develop a theory
(ii) Controlling, manipulating, observing and measuring the effect
(iii) Exploring the shared culture of a group of people
(iv) Exploring individual stories to describe the lives of people
(v) Extending generalizations from sample to population
Select the correct answer from the following options:
  1. A.(i), (iii) and (iv)
  2. B.(i), (ii) and (iii)
  3. C.(ii), (iii) and (v)
  4. D.(ii), (iv) and (v)

Domain knowledge (Environmental Science)

1
Thermal stratification of aquatic ecosystems takes place in
  1. A.tropical lakes
  2. B.temperate lakes
  3. C.glacier lakes
  4. D.meandering rivers
2
The scale length of pressure variations in atmosphere in vertical direction in about
  1. A.3 km
  2. B.4.8 km
  3. C.7 km
  4. D.12 km
3
Which radioacative elements is considered as an indoor pollutant
  1. A.Oxygen – 18
  2. B.Nitrogen – 15
  3. C.Carbin – 13
  4. D.Radon
4
In a closed thermodynamic system, across its boundaries
  1. A.no transfer of heat is possible
  2. B.no transfer of work is possible
  3. C.transfer of heat is possible but not of work
  4. D.transfer of heat and work is possible
5
In an urban area, moist air at 27  has a mixing ratio- of 50 gm per kg. Its virtual temperature is
  1. A.33.69
  2. B.38.15
  3. C.36.15
  4. D.32.30
6
Identify the correct sequence of energy flow through various levels of an ecosystem
  1. A.
    Sun’s energy→ Primary producers →Carnivores
  2. B.
    Sun’s energy→ Primary producers →Carnivores→ Herbivores
  3. C.
    Sun’s energy →Herbivores→ Primary producers
  4. D.
    Sun’ senergy→ Primary producers →Herbivores →Carnivores
7
When environmental lapse rate is more than dry adiabatic lapse rate, the atmosphere is said to be in
  1. A.Stable state
  2. B.
    Unstable state
  3. C.
    Neutral state
  4. D.
    Conditionally stable state
8
Which of the following accounts for nearly 75% of the available fresh water in the world?
  1. A.
    Groundwater
  2. B.
    Glaciers
  3. C.
    River water
  4. D.
    Lakes
9
The summers in Taiga climatic zone are
  1. A.
    Hot, humid and long
  2. B.
    Warm and short
  3. C.
    Cool, rainy and short
  4. D.
    Hot and try
10
Utilitarian conservation theory was established by
  1. A.
    Roosevelt and Pinchot
  2. B.
    John Muir
  3. C.
    Rachel Carson
  4. D.
    Brundtland
11
What are the steps necessary for sustainable management of renewable resources?
  1. A.Avoiding over-exploitation and pollution of biotic systems.
  2. B.Strengthening the resource base and augmentingregenerability of biotic systems .
  3. C.Use of alternative resources .
  4. D.All of these
12
Fluxes of heat ,water vapour and momentum are constant in
  1. A.upper atmosphere
  2. B.middle atmosphere
  3. C.Ekman layer
  4. D.surface boundary layer
13
Inversions occur when atmosphere is
  1. A.unstable
  2. B.neutral
  3. C.Slightly stable
  4. D.most stable
14
When one species limits access of another species to a resource regardless of whether the resource is abundant or scarce ,it is called
  1. A.interspecific competition
  2. B.interspecific competition
  3. C.intraspecific competition
  4. D.exploitative competition
15
Nanda Devi Sunderbans  are  examples of Indian
  1. A.National parks
  2. B.Sanctuaries
  3. C.International   heritage areas
  4. D.Biosphere reserves
16
If the standard deviation of a population is 20 and the standard error of mean is ,then the sample size is
  1. A.25
  2. B.80
  3. C.5
  4. D.100
17
In a multiple regression model , the explained variance per d.f .is 50 and unexplained  variance per d.f. is 10 the F-ratio is
  1. A.2.5
  2. B.5
  3. C.25
  4. D.0.2
18
Which one of the following is not a random sampling method?
  1. A.Stratified Sampling
  2. B.Cluster Sampling
  3. C.Systematic Sampling
  4. D.Judgement Sampling
19
The acidity of normal rain water is due to
  1. A.CO2
  2. B.CI2
  3. C.NO2
  4. D.SO2
20
Per cent of water on the world’s surface representing fresh water is
  1. A.97
  2. B.50
  3. C.10
  4. D.3
21
Assertion (A) : Every country should integrate the principles of sustainable development into its policies and programmes.
Reason (R) :Environmental resources are a nation’s wealth
Chooes the correctcode from the following
  1. A.Both (A) and (R) are  true and (R) is the correct explanation of (A).
  2. B.Both (A) and (R)  are true ,but (R) is not the correct explanation of (A).
  3. C.(A) is true but (R) is false.
  4. D.(A) is false but (R) is true
22
wind rose represents statistical distribution of.
  1. A.wind velocity in vector from
  2. B.wind speeds in scalar from
  3. C.wind speeds in π diagram
  4. D.wind speeds in the from of histograms
23
In the redox  reaction given below , which one of  the substrates in forward reaction is oxidezed?
2Fe3+ + H2→ 2Fe2+ + 2H+
  1. A.
    Fe3+
  2. B.
    H2
  3. C.
    H+ 
  4. D.
    Fe2+ans
24
If soil in a given area is wetted and allowed to drain till percolation is stopped , the amount of water thus retained is called
  1. A.
    storage capacity
  2. B.
    Capillary capacity
  3. C.
    Hygroscopic capacity
  4. D.
    Field capacity
25
Quantity of 5M HCI required for preparing 1000 ml of  0.1 M HCI is
  1. A.
    20 ml
  2. B.
    2ml
  3. C.
    200ml
  4. D.
    100ml 
26
Assertion (A) Biosphere constitutes an excellent life- support system which is sustainable and can fulfill all human needs .
Reason (R): The size and productivity of  the biosphere is limited availability of water, nutrients and environmental conditions .Identify the correct code:
  1. A.Both (a) and (r) are true and (r) is the correct explanation of (a)
  2. B.Both (a) and (r) are true, but (r) is not the correct explanation of (a).
  3. C.(a) is true but (r) is false.
  4. D.(a) is false but (r) is true .
27
Geostrophic wind occurs when pressure gradient force balances
  1. A.Coriolis force
  2. B.Fricitonal force
  3. C.Centrpetal force
  4. D.Coriolis and frictional force together
28
Scales of Meteorolgy  are  in the following adersatring from the least
  1. A.Macro -, Micro-, Meso
  2. B.Macro -, Meso -,Micro
  3. C.Meso -, Macro -, Micro
  4. D.Micro -, Meso-, Macro
29
When the full potential of physical , chemical and biological factors, a species can use if there is no competition , it is called
  1. A.Fundamental niche
  2. B.Ecological niche
  3. C.Realized niche
  4. D.Competitive exclusion
30
The uppermost zone of atmosphere of earth, where shortwave ultraviolet radiations are absorbed, is
  1. A.Troposphere
  2. B.Stratosphere
  3. C.Mesosphere 
  4. D.Thermosphere
31
An endotherm basal metabolic rate stays constant throughout a range of environmental temperatures known as the:
I.  Lower critical temperature zone
II.  Thermoneutral zone
III.  Higher critical temperature zoneChoose the correct answer:
  1. A.I only
  2. B.II only
  3. C.I and II only
  4. D.II and III only
32
Which of the following is/are types of pollution that affect the environment?
  1. A.Air pollution
  2. B.Water pollution
  3. C.Land pollution
  4. D.All of the mentioned
33
Indicators for sustainable development are:
I. environmental pressures
II. environmental quality
III. society s responseChoose the correct answer:
  1. A.I and II only
  2. B.II and III only
  3. C.I and III only
  4. D.I, II and III
34
Stoichiometric calculations are based on:
  1. A.Moles
  2. B.Atomic weight
  3. C.Atomic number
  4. D.Loss of mass.
35
BOD of the effluents discharged on land for irrigation should not exceed:
  1. A.30 mg/L
  2. B.100 mg/L
  3. C.300 mg/L
  4. D.60 mg/L
36
For a clear night and with windspeeds< 3 m/s , the atmosphere is
  1. A.stable
  2. B.slightly unstable
  3. C.neutral
  4. D.slightly stable
37
Assertion (A)  :  Chemosynthesis plays an important role in ‘S’ cycle.
Reason  (R)  :  In chemosynthesis, some sulphur compounds act as source of energy
Codes  :
  1. A.Both (A) and (R) true and (R) is the correct explanation.
  2. B.Both (A) and (R) are true and (R) is not the correct explanation.
  3. C.(A) is true, but (R) is false.
  4. D.(A) is false, but (R) is true.
38
Which of the following is NOT a correct statement.
  1. A.Tropics are the warmest and wettest regions .
  2. B.Subtropical high pressure zones create dry zones at about 300 N and S.
  3. C.Temperature and precipitation are lowest at the poles.
  4. D.Temperature is lowest and precipitation is highest at the poles. .
39
Protecting nature and the wilderness for its own sake is referred as
  1. A.Deep ecology
  2. B.Shallow ecology
  3. C.Self ecology
  4. D.Selfess ecology
40
For the analysis of oxides of Nitrogen, whichof the following set of reagents are used
  1. A.Sulphanilic acid, NEDA, H2O2, HNO3
  2. B.Sulphamicacid , NEDA H2O2, HNO3
  3. C.Sulphamicacid,Nicotine, H2O, HNO3
  4. D.Sulphomolybdic acid, NEDA, H2O2 H2SO4
41
Which one of the following elements contributes maximum to the earth crust by weight
  1. A.Iron
  2. B.Silicon
  3. C.Oxygen
  4. D.Carbon
42
The lowest temperature is observed in which layer of the atmosphere
  1. A.Troposphere
  2. B.Stralosphere
  3. C.Mesosphere
  4. D.Thermosphere
43
Which of the following gases has the lowest residence time
  1. A.CO2
  2. B.N2O
  3. C.CFCs
  4. D.CH4
44
Which of the following statement is incorrect
  1. A.Chromium (VI) is highly toxic
  2. B.Methyl mercury is most toxic species
  3. C.Arsenic (III) is more toxic than arsenic (V)
  4. D.Cadmium is a criteria pollutant
45
The most abundant functional group present in fulvic acid commonly found in soils is :
  1. A.Peptide group
  2. B.Carboxylate group
  3. C.Phenolic group
  4. D.Amino group
46
Mesoscale Meteorogical Phenomena occur over areas of horizontal distance in the range (km)
  1. A.100 – 200 km
  2. B.1 – 100 km
  3. C.10 – 50 km
  4. D.1 – 10 km
47
The Indian monsoon period is from
  1. A.October to November
  2. B.December to February
  3. C.June to September
  4. D.March to May
48
Which of the following is not a reactive oxygen species
  1. A.Hydrogen peroxide
  2. B.Hydroxyl ion
  3. C.Singlet oxygen
  4. D.Superoxide anion
49
Which of the following is not a greenhouse gas ?
  1. A.methane
  2. B.nitrous oxide
  3. C.Sulfur Hexa Fluoride
  4. D.carbon monoxide
50
Azaridine, Ethylene dibromide, Bis(chloromethyl) ether are
  1. A.Alkylating agents
  2. B.Hydrocarbons
  3. C.Hydrazines
  4. D.Aromatic amines
51
The grain size (USDA) of silt in soil ranges between :
  1. A.0.2 mm to 0.5 mm
  2. B.0.5 mm to 0.1 mm
  3. C.0.1 mm to 0.05 mm
  4. D.0.05 mm to 0.002 mm
52
What will be BOD, for a wastewater sample when 21 ml of sample is diluted to 300 ml in BOD bottle to determine dissolved oxygen .
[Given: Initial DO, = 10 mg/l; Five days later DO5 = 5 mg/l]
  1. A.~ 5 mg/l
  2. B.~ 25 mg/l
  3. C.~ 71.4 mg/l
  4. D.~75 mg/l
53
What will be the concentration of 40 ppb SOรขโ€šโ€š in µg/m³ unit at 25°C ?
  1. A.~ 0.04 µg/m³
  2. B.~ 1047 µg/m³
  3. C.~ 104.7 µg/m³
  4. D.~ 10.47 µg/m³
54
National Ambient air quality standards typically include following components :
  1. A.Maximum and Minimum pollutant levels, adjustment for co - pollutants
  2. B.Abetment strategies, non - attainment penalties
  3. C.Ambient temperature, size distribution and relative humidity
  4. D.Indicator (Chemical/Chemical class), Averaging time, Pollutant form and level
55
Primary air pollutants differ from secondary air pollutants as they :
  1. A.are present in levels that can be weighed on filter paper
  2. B.are directly emitted from identified sources
  3. C.have undergone chemical transformation in air after release from identified sources
  4. D.are designated as hazardous air pollutants
56
Continuity equation expresses the law of conservation of :
  1. A.Momentum
  2. B.Mass
  3. C.Entropy
  4. D.Energy
57
Which of the following statements correctly represent the environmental wisdom worldwide ?
  1. A.Our success depends on how well we manage the earth's life support systems mostly for our benefits
  2. B.Our success depends on how well we manage the earth's life support systems for our benefit and for the rest of nature
  3. C.Our success depends on learning how nature sustains itself and integrating such lessons from nature into the ways we think
  4. D.Our success depends on using environmentally beneficial forms of economic growth and discourage environmentally harmful forms
58
Exposure concentration is _______ .
  1. A.the amount of the chemical that is received by the target
  2. B.the amount of chemical present in the medium with which an Organism has contact
  3. C.the amount of the chemical that is excreted by the target
  4. D.the amount of the chemical that is metabolized by the target
59
In ecotoxicology studies, ED - 50 is _______ .
  1. A.the dose that affects 50% of the population or observed subjects
  2. B.the dose that affects 95% of the population or observed subjects
  3. C.the dose that affects 25% of the population or observed subjects
  4. D.the dose that do not affect 50% of the total population
60
A hypothesis, that predicts a linear relationship in which rate of ecosystem processes is maximum with greatest number of species, is known as :
  1. A.Rivet - popper hypothesis
  2. B.Redundancy hypothesis
  3. C.Diversity -  stability hypothesis
  4. D.Idiosyncratic hypothesis
61
Which of the following is not a phase of secondary succession ?
  1. A.Initiation
  2. B.Continuation
  3. C.Termination
  4. D.Invasion
62
The Concept of r - and k - selection was originally given by :
  1. A.MacArthur and Wilson (1967)
  2. B.Grime (1979)
  3. C.Molles (2008)
  4. D.Mayr (1942)
63
The prefix "steno" and "eury” have been used for :
  1. A.comparing the relative degree of tolerance of an organism to a given environmental factor
  2. B.comparing the body size of organisms occurring in a given habitat
  3. C.comparing the metabolic activity of organisms in a given habitat
  4. D.comparing the distribution limits of organisms occurring across a biome
64
The strong and rapidly moving circumpolar upper air westerly circulation in a narrow belt of a few hundred kilometers width in the upper limit of the troposphere is called _______ .
  1. A.Rossby waves
  2. B.Jet streams
  3. C.Walker streams
  4. D.Hadley Circulation
65
Coriolis effect is :
  1. A.the influence of Earth's rotation, which tends to turn air towards the right in the Northern Hemisphere
  2. B.the influence of Earth's rotation, which tends to turn air upwards in the Northern Hemisphere
  3. C.the influence of Earth's rotation, which tends to turn air towards the left in the Northern Hemisphere
  4. D.the influence of Earth's rotation, which tends to turn air downwards in the Northern Hemisphere
66
The boundary between fresh and salty groundwater along shorelines is determined by  :
  1. A.recharge and discharge in freshwater aquifer
  2. B.composition of salty and fresh groundwater
  3. C.rainfall
  4. D.nature of aquifer
67
The sum of diffused and direct solar radiation, is called :
  1. A.continental solar radiation
  2. B.global solar radiation
  3. C.total solar radiation
  4. D.universal solar radiation
68
Which one of the following elements is used in making Photovoltaic Solar cell ?
  1. A.Tungsten
  2. B.Silver
  3. C.Lead
  4. D.Silicon
69
The destructive distillation of coal yielding products such as gasoline, diesel oil and other products, is known as
  1. A.gasification
  2. B.precipitation
  3. C.condensation
  4. D.liquefaction
70
Which process facilitates conversion of raw fat into biodiesel in the presence of alcohol ?
  1. A.Glycerol conversion
  2. B.Saccharification
  3. C.Torrefaction
  4. D.Transesterification
71
Which plant/tree has been recommended in India for extraction of biodiesel ?
  1. A.Wheat (Triticum aestivum)
  2. B.Sugarcane (Saccharum officinarum)
  3. C.Mango (Mangifera indica)
  4. D.Karanja (Pongamia pinnata)
72
Anammox bacteria is required for which of the following steps in wastewater treatment ?
  1. A.Nitrate to Nitrite conversion
  2. B.Nitrite to Nitrate conversion
  3. C.Molecular Nitrogen to Ammonia conversion
  4. D.Ammonium ion to Molecular Nitrogen conversion
73
Which of the following is an INCORRECT statement ?
  1. A.Humus represents organic matter, dark in colour
  2. B.Acid soils are devoid of basic cations
  3. C.Humus contains cellulose and hemi cellulose
  4. D.Humic and fulvic acids in humus form hydrophobic colloid whereas clay colloids are hydrophilic in nature
74
The use of bacteria and other microorganisms to breakdown hazardous waste into relatively harmless components, is termed as :
  1. A.phyto remediation
  2. B.source reduction process
  3. C.integrated waste management
  4. D.bioremediation
75
Which of the following is INCORRECT about the given decomposition reaction ?

  1. A.All carbon in (1) is oxidized
  2. B.Some Carbon in (1) is oxidized and some is reduced
  3. C.This is an example of fermentation
  4. D.It produces gas that some time catches fire
76
Heavy metals are retained in soil/sludge by :
  1. A.complexation by humic substances in organic particles
  2. B.absorption on to surface of mineral particles
  3. C.precipitation reaction
  4. D.solubilization in acidic conditions
77
There is often a formal review and licensing procedures of Environmental Impact Assessment. Who would NOT carry out such a procedure ?
  1. A.The proponent of the development project
  2. B.The local government authority ultimately responsible for licensing development project
  3. C.Another government agency which can be given responsibility for licensing development project
  4. D.An independent body having knowledge of the development project
78
As per United Nations Framework Convention on Climate Change (UNFCC), which of the following has role in the assessment and review of the effective implementation of the convention ?
  1. A.Subsidiary Body for Scientific and Technical Advice (SBSTA)
  2. B.Subsidiary Body for Implementation (SBI)
  3. C.The Conference of Parties (COP)
  4. D.The Climate Change Secretariat
79
"A financial mechanism through which developing countries would be rewarded for emission reduction achieved by taking action to reduce deforestation and forest degradation" refers to :
  1. A.Clean Development Mechanism
  2. B.Global Forest Carbon Mechanism
  3. C.Reduced Emission from Deforestation and Forest Degradation
  4. D.Incentive - Compatible Selection Mechanism
80
Which of the following principle was introduced in 1972 by the Organization for Economic Cooperation and Development (OECD) guiding principles concerning Institutional Economic Aspects of Environmental Pollution ?
  1. A.Frontier Diplomacy Principle
  2. B.Polluter Pays Principle
  3. C.Human Rights and Environment Principle
  4. D.Principle of Environment Protection
81
Which section of Environmental (Protection) Act, 1986 deals with offences by companies ?
  1. A.Article 13
  2. B.Article 14
  3. C.Article 16
  4. D.Article 18
82
Which Article of the Constitution of India states that it shall be the duty of every citizen of India to protect and improve the natural environment and to have compassion for living creatures ?
  1. A.Article 48A
  2. B.Article 51A
  3. C.Article 21A
  4. D.Article 13A
83
Which among the following is the first major Environmental Protection act to be promulgated in India ?
  1. A.Biological Diversity Act
  2. B.Environmental Protection Act
  3. C.Forest Conservation Act
  4. D.Wildlife Protection Act
84
Which of the following sections of the Indian Penal Code refers to making atmosphere noxious to health as a punishable offence ?
  1. A.Section 275
  2. B.Section 276
  3. C.Section 277
  4. D.Section 278
85
Which of the following is NOT included during Environmental Impact Assessment (EIA) ?
  1. A.A detailed assessment of the planned project and selected alternative compared to the baseline conditions
  2. B.Qualitative description measuring higher, medium and low impacts
  3. C.Quantitative description measuring physical values of water withdrawal, sewage produced and pollutants released
  4. D.All the data collection, analysis and developed plans summarized together in a well-structured and concise documents
86
To find out the degree of linear relationship between age and height of trees, the parameter to be estimated is :
  1. A.Standard Error
  2. B.Correlation coefficient
  3. C.Median
  4. D.Standard deviation
87
The Coefficient of Variation can be measured by :
  1. A.(Mean/Standard deviation) × 100
  2. B.(Median/Standard deviation) × 100
  3. C.(Standard deviation/Mean) × 100
  4. D.(Standard deviation/Median) × 100
88
Which of the following is a nominal variable ?
  1. A.Level of rainfall (Mild, Moderate, Severe)
  2. B.Blood group type (A, B, AB, O)
  3. C.Height of a tree
  4. D.Socio - economic status (Low, Middle, High)
89
'Hysteresis' is the best defined as :
  1. A.A change occurring at a steady rate where rate is defined by the directions of change
  2. B.A change occurring at a steady rate followed by sudden increased rate catastrophically
  3. C.A change that occurs at steady rate and maintains so
  4. D.A change that is sudden non - linear between two stable states without the prospect of reverse
90
Which one of the following is correctly matched pair ?
  1. A.Biodiversity Conservation - Basel Convention
  2. B.Global Warming - Montreal Protocol
  3. C.Climate Change - Kyoto Protocol
  4. D.Groundwater Pollution - Ramsar Convention
91
Who among the following received Noble Prize for peace and started the Green Belt Movement ?
  1. A.Rajendra K. Pachauri
  2. B.Wagai M. Matthai
  3. C.Jim Bohlen
  4. D.Gro Harlem Brundtland
92
Genetic Engineering is possible because :
  1. A.Restriction endonucleases purified from bacteria can be used in vitro
  2. B.The phenomenon of transduction in bacteria is well understood
  3. C.We can cut DNA at specific sites by endonucleases like DNase
  4. D.We can see DNA by electron microscope
93
LEED, one of the Sustainable Habitat green rating systems, refers to :
  1. A.Leadership in Energy and Efficiency Design
  2. B.Leadership in Energy and Efficiency Document
  3. C.Leadership in Energy and Environment Design
  4. D.Leadership in Energy and Environment Document
94
'Prerak Dauur Samman', the annual award given under which of the following scheme of Government of India ?
  1. A.Smart Cities
  2. B.Namami Gange
  3. C.Swachh Bharat Abhiyan
  4. D.Green India Mission
95
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) :
Assertion (A) : Active ingredient in most pesticides are organic chlorine compounds .
Reason (R) : Organo chlorines have low solubility in water, high solubility in hydrocarbon like environment and have relatively high toxicity to insects and low toxicity to humans .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C. (A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
96
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : Temperature of large waterbody varies more slowly than that of the land of comparable size .
Reason (R) : Specific heat of water is high i.e., about five times of soil .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C.(A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
97
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A): Small increase in wind velocity and height of turbine produces a large increase in energy yield .
Reason (R) : Energy yield from wind is proportional to third power of wind speed and wind speed increases with height above ground .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C.(A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
98
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : a and ß particles, emitted during a radioactive decay of a nucleus are simply nucleus of Helium and electron and are called as ionizing radiations .
Reason (R) : a and ß particles produced in the radioactive decay are ejected with an incredible amount of energy of motion. When this energy is absorbed by matter encountered by the particle, it often ionises atoms and molecules .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C.(A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
99
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A): Cool pavements are generally composed of light coloured material with high permeability .
Reason (R) : Lighter coloured pavements reflect more light and absorb less heat. High permeability allow water to percolate and evaporate, thereby cooling pavement and surrounding air .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C.(A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
100
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : Dematerialization. the progressive decrease in size and weight of a product as a result of technological improvement is an example of source reduction .
Reason (R) : New product is more durable than the one being replaced .
In light of the above statements, choose the correct answer from the options given below :
  1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B.Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C.(A) is true, but (R) is false
  4. D.(A) is false, but (R) is true
Question for NTA UGC NET Environmental Science 2026 - Quiz / Questions / MCQ - Toppersexam