TLS Online

Previous Year Questions

Performance Meter

TLS Online TPP Program

QUESTION ID:1

Which one among the. following do all the terrestrial biomes·have in.common?

Armual average rainfall in excess of25 em

Clear boundaries between adjacent biomes.

Vegetation demonstrating adjacent stratification

Biodiversity"pattern that is directly proportional to latitude

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25855&year=2019&month=June

QUESTION ID:2

Which of the following modes of energy generation has maximum conversion efficiency?

Hydroelectric

Thermoelectric

Hydrogen fuel cell

Geothennal

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25856&year=2019&month=June

QUESTION ID:3

Spring tides occur

When sun and moon are at right angle with respect to earth

ln spring season

During half-moons

When sun moon and earth are aiigned linearly

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25857&year=2019&month=June

QUESTION ID:4

What is the required solar panel area for photovoltaic cells 'with efficiency of 20% and incident solar radiation. of 400 W/m2 to-run ail electric geyserof2 kW?

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25858&year=2019&month=June

QUESTION ID:5

A windmill has to 10-m diameter and. efficiency of 40%.. Wind velocity at normal temperature ahd pressure is 10 m/s and the density of air is 1.29 kg/m 3 The expected power output frotn the,windmill is

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25859&year=2019&month=June

QUESTION ID:6

An ozone analyser shows 100 ppb concentration at 1 atmosphere Ot atm and 25 °C Convert the. observed concentration of ozone in ug/m3

96.0

196.2

200.0

48.92

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25860&year=2019&month=June

QUESTION ID:7

Match List-I(Gases) with List-II (MeasurementTechniques

Choose the correct answer from the options given below

(a)-(i); (b)-(ii); (c)-(iii); (d)-(iv)

(a)-(iv);.(b)-(iii); (c)-(ii); (d)-(i)

(a)-(ii); (b}-(iv );, ( c )-{i); ( d)-(iii)

(a)-(iv); (b)-(ii); (c)--(iii); (d)-(i)

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25861&year=2019&month=June

QUESTION ID:8

Given. below are two statements, one is labelled as Assertion (A) and the other as

Reason(R) .

ASseition (A) RefuSe derived ftrel ·from municipal ·solid waste has higher energy content than raw municipal solid. waste,

Reason (R) Combustible organic material gets concentrated in fuel pellets produqed from municipal solid waste.

Choose the correct answer from the options given below

Both (A) and (R)-are true and (R) is the correct explanation of (A)

Both .(A) d(R)are true but{R) is not.the correct explanation of A

(A) is true, but(R) is false

(A) is false , but (R)'is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25862&year=2019&month=June

QUESTION ID:9

Consider a normal distribution f(x)of:variable x. what percentage ·of variable values deviate frortl the mean by more than

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25863&year=2019&month=June

QUESTION ID:10

If x and y are two variables with independent frequency distributions with means

and

variances of their difference and

then the population variances of their difference is

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QUESTION ID:11

Given be low are two statements one labelled as Ass.ertion (A) and the other as

Reason .(R).

Assertion (A) Reason.(R)

Sounds with a frequency <1 0'0 Hz{base notes) need to be of a higher energy before damage to. ear occurs

Human ear has variable frequency response

Choose the correct answer from the options given below

Both (A.) and (R) are true and (R) is the correct explanaion of(A)

Both (A) and (R) are true . but-(R) is not the.correct explalation of(A)

(A) is·true, but R is false

(A) is false but (R)is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25865&year=2019&month=June

QUESTION ID:12

Landslide incidences in the Himala.yashave increased due to:

(a) Increased rainfall

(b) Deforestation

{c) Construction of new roads

Choose the correct option

(a) and (b) only

(b) and (c) only

(b) only

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25866&year=2019&month=June

QUESTION ID:13

Hardness of minerals depends on

Chemical composition and physical makeup

Physical makeup and atomic coliistifution

Parent material

Chemical composition and atomic.constitution

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25867&year=2019&month=June

QUESTION ID:14

Match List-1 (Taxa) with List-11 (Taxa PropertY)

Choose the correct answer from options given below :

( a)-(ii); ..(b)-{iii);. ( c.)-(i); ·(d)-(iv)

(a}-(ii); (b)-(iii); (c)-(iv.); (d)-(i)

(a)-(i); (b)-(iii); (c)-(ii); (d)- (iv)

(a)~(iii); (0)-(iv); (~)-(i); (d)-(ii)

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25868&year=2019&month=June

QUESTION ID:15

Which is the correct hierarchical level of orgatrisation in ecology?

Organism, population, community, ecosystem, biome,_landscape, ·ecosphere

Organism, population community ecosystem, landscape biome ecoshere

Organism, community population ecosystem, landscape, biome, ecosphere

Organism ·population, community landscape, ecosystem, biome, ecosphere.

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25869&year=2019&month=June

QUESTION ID:16

The largest unit in which gene flow is possible is

Population

Genus

Species

Family

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QUESTION ID:17

Mycorrhizae enhance plant nutrition mainly by

Providing sugar to root cells

Absorbing water andminerals

Converting atmospheric nitrogen to ammonia

Enhancing root growth

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QUESTION ID:18

Given below are· two statements. One labelled as Assertion {A) ·and the otherlabelled as

Reason (R). ·

Assertion (A)

Reason(R)

The occurrence of acid rain over the Indian landmass is extremely rare.

The alkaline dust and ammonia (NH3) produced .from agricultw:al mareas neutralise the acid formatiort in the atmosphere.

Choose the correct answer from the options ·given below.

B·oth (A) and (R) are true and R is the correct explanation of A

Both (A) and (R) are true but R is not the correct explanation of A

(A) is true, but.(R) is false

(A) is false but (R) is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25872&year=2019&month=June

QUESTION ID:19

Match List-I (Enviormentel).thl Pollutant) with List-II (Instruments Used for Analysis)

Choose the correct answer from the options given below

( a}-(i); (b )-(ii); ( c)-:(ili); ((j)-(iv)

(a)-(ii); (bj-(rii);. (c)-(iv); (d}-(i)

(a}-{i); (b).-(ii); (c)-(iv); (d)-( iii)

(a)-(iv); (b)-(i); (c)-(ii); (d)-(iii)

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25873&year=2019&month=June

QUESTION ID:20

Given below are two statements, one labelled as Assertion (A) and the other labelled as

Reasoil(R}

Asertion.(A) : If BOD ievel of water in a reservoir less than 5 mgL

it is

highly polluted.

Reason .(R) High BOD means high microbial activity.

Choose· the correct answerfrom the options-given.below.

Both (A) and (R) are true and (R.) is the correct explanation of (A)

Both'(A) and (R}are true but (R) is not'the ·correct explanationof(A):

(A) is true, but (R) is false

(A) is false but R is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25874&year=2019&month=June

QUESTION ID:21

Which among the following CAN .NOT be categorized as VOCs?

Polycyclic Aromatic Hydrocarbons

Halocarbons

Non-methane Hylrocarbons

Oxygenates

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QUESTION ID:22

Glven below are two statements, one labelled ·as Assertion (A) and the other·labelled as

Reason (R).

Assertion (A) CarbondioXide content in soil ait is more than atmospheric air.

Reason (R) ·Carbo:n dioxide released from .automobile exhaust an.d industries gets sequestered in the soil

Choose. the correct answer from the options given below.

Both (A) and (R) are true and{R}is the correct explanation of (A)

Both (A.) and (R) are true, but (R) is not the. correct explanation of(A)

(A) is true, but (R) is false

(A)-is false,but (R) true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25876&year=2019&month=June

QUESTION ID:23

Fulvic acid molecules in·soil hmnus are

(a) Randomly coiled

(b) More polar

(6) Hi~hly-charged

(d) Smaller molecules than humic acrd molecules

Choose the correct option

·(a)(b), and (c) only

(b)(c) and(d) only

'(a), (c) and (d) only

(b) and{d) only

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25877&year=2019&month=June

QUESTION ID:24

Wind rose reveals

(a) Percentage of times wil:tds. ~rsistin aspecinc direction

(b) M{5st probable di'rection of winds

(¢) Percentage duration for which Wind speeds are in a· given range

(d) Wind energy potential

Select the correct answer from the options given below

(a) .and:(b) only

(b ,(c) and (d) only

(a (b) and (d) only

(a)(b.)and (c) only

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25878&year=2019&month=June

QUESTION ID:25

Spectral response pattern of leaves in healthy vegetation in SWIR region of EMR is primarily a function of

1.Chlorophyll centent

2. Leaf parenchyma

3. ·water content of the leaf

4. Presence· of waxy layer on epidermis

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25879&year=2019&month=June

QUESTION ID:26

Which Forest type has the highest percentage cover in the country?

Tropical deciduous

Tropical evergreen

Temperature deciduous

Mangrove

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25880&year=2019&month=June

QUESTION ID:27

Saturatiort vapour pressme at given temperature is 900 mbar while it is 600 mbar at dew point temperature. What will be the relative humidity?

90%

66.7%

60%

76.6%

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25881&year=2019&month=June

QUESTION ID:28

Major attributes of a restored ecosystem are :

(a) Representation of all functional groups

(b) Amelioration of physical env1rorunent

{d) Absence of-potential threats

Choose the correct option

(a). and (b) only

(a), (b)(c) and (d).

(b), (c.).and (d) only

a (c) and (d) only

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QUESTION ID:29

Given below are two statements, one is labelled as Assertion (A) and .the other as

Reason R

Assertion (A) : Biogas production is reducedin winters

Reason (R) .Methanogeneoccurs .at tn~sophilio ·temperatures.

Choose the correct answer from the,options·given.below.

Both'(A) and (R) are true and (R).is the correct explanation of(A)

Both(A) and (R) are true but (R) is·not the·. correct ex;planati.on of (A)

(A) is true,.but(R) is false

(A) is false, but (R:).is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25883&year=2019&month=June

QUESTION ID:30

Arrange the following biomes in the increasing order of primary productivity (answer is not correct)

(a) Savatinah

(b) Boreal forests

(d) Temperate· grasslands

Choose the correct option;

(a),(c), (b) and (d)

(c}, (b), (a) and (d)

(c), (a),. (d) and (b)

(b)(c) (d) and. (a)

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25884&year=2019&month=June

QUESTION ID:31

what percent of visible radiation account for total solar. radiation incident on top of atmosphere?

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25885&year=2019&month=June

QUESTION ID:32

Ozone depleting potential is measured with reference to

1.CFC-11

GFC-12

HCFC-22

CFC-113

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QUESTION ID:33

According to National Ambient Air Quality Standards (NAAQS) annual average conceRttation (p.glm3} for S02· and NO2.ecologically sensitive areas are

1. 20 and 60 respectively

2.80 and 47"respectively

3.50 and 20-respectively

4.20 and 30 respectively

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QUESTION ID:34

Which toxic metal is present in the colour printing inks of magazine pages?

1. Lead

2. Cadmium

3. Arsenic

4. Mercury

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25888&year=2019&month=June

QUESTION ID:35

Which is an exotic epigeic earthworm used widely for vermicomposting in India?'

1. Perionyx excavatus

.2. Eudrilus eugeniae

3. Drawida· willsi

4. Lampito·mauritii

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QUESTION ID:36

Greenhouse gas ·C02 has very strong absotption band in the wavelength region

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QUESTION ID:37

Match List I (NGO Mevements) with List-II (Years of Struggle)

Choose the· correct answer ·fronrthe opt;ions. given below

(a)(ii); (b)-(iii}; ( c)-(i.v );.:(d)-(i)

(a)-(iii) (h)-(ii); (c)-(iv); (d)--(i)

(a)-(i)(b)-(i); ( c)-(iii); (d).-(ii)

(a)-(ii); {b)-(i};( e)-(iv); (d)-(iii)

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25891&year=2019&month=June

QUESTION ID:38

In order of intensity of different components of electromagnetic radiation emitted from sun reaching earths surface, identify the correct sequence :

1.ultraviolet > visible > infrared

2. Ultraviolet < visible < infrared

3. ultraviolet > infrared > visible

4. ultraviolet < infrared > visible

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QUESTION ID:39

Ground truth data in remote sensing· is collected for :

(a). Analysis .of remote. sensing .data

(b) .Accuracy .assessment

Choose the correct option:

(a); (b) and (C.)

(a)and (c) only

(b)and (c) only

(a) and; (b) only

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25893&year=2019&month=June

QUESTION ID:40

A lake has 2 ·5 mgl of dissolved organic carbon. The. dissolved organic matter concentration in the lake is approximately·

6·25 mgL-1

4·25mgL -1

3.25 ·mgL-1

2.75 mgL -1

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QUESTION ID:41

Moderate disturbance in an ecosystem

1. Increases biodiversity·

2. Decreases biodiversity·

3. Has· no effect on biodiversity

4. Increases carrying capacity

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QUESTION ID:42

Removal of decomposers from an ecosystem will lead to

1. Increase in number of

2. Reduction in nutrient cycling

3. Increased· number of carnivores

4. Decreased number of carnivores

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QUESTION ID:43

What type of rock will be when the lava cools and crystallizes?

1. Intrusive. igneous

2. Extrusive igneous.

3. Metamorphic

4. Sedimentary

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QUESTION ID:44

Which of the· following parameters provides information on ignition quality of diesel?

1. Octane number

2. Cetarte ntlrtiber

3. Iodine value

4. Acid value.

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QUESTION ID:45

Given below are two statements one labelled as Assertion (A) and the other labelled as

Reason(R).

Asertion (A) Hydroxides of Alurninium (III) .or Iron (III) are quite effective in

removing colloidal clay particles from turbid water.

Reason (R) · Hydroxides :from positively .charged floes attract and carry down

negatively charged colloidal clay particles.

Choose the correct answer from the options given below

Both (A) a.nd{R) are true and (R) is the correct ex;planation of(:A;)

Both (A) and(R).are true)· but.(R) is not the correct explanation of (A)

(A) is true, but(R).is false

(A) is false but R is true

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25899&year=2019&month=June

QUESTION ID:46

Which energy conversion process,is involved in syngas production from biomass?

1. Combustion

2. Gasification

3. Pyrolysis

4. Fermentation

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QUESTION ID:47

Electrostatic precipitator (ESP} is good for controlling

1. VbCS

2. Green house gases

3. Fine particUlate· matter

4. SUlphur compounds

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QUESTION ID:48

Which method is most appropriate for separating tin cans from aluminium cans in municipal .solid waste ?

1.Shear shredding

2. Manual sorting

3. Pelletizing

4. Magnetic field separation

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QUESTION ID:49

Fire occurrence in the forests depends on

(a) Fuelload

{b) Veg tatiorttype

Choose the correct option

(a)' and· (b) only

(a), (b) :and·(c)

(b).and (c) only

(a) and:( c) only

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QUESTION ID:50

Which of the following biomes has the largest area?

1. Grassland

2. Desert

3. Taiga

4. Rainforest

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QUESTION ID:51

Match List-.1 (ISO StandardS) with List--II (Envirorunental ·Management Aspects :

Choose the correct answer from the options given below :

( a)- (i);.(b)-(ii); .. ( c)-(iv); (d)-{iii)

(a)- (iv).; (b)- (iii); :(c)-. (i); (d)-(ii)

(a)-(i).;(o)-(iii); (c):-(iv).; (d)-(ii)

( a)-(iv); (Q}-(ii); {c)-(iii); (d)-(i)

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QUESTION ID:52

Which is the first mineral to from 'in cooling magma?

1.Olivine

2. Quartz

3. Mica

4. Potassiurn feldspar

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QUESTION ID:53

Which instrument is used to measure total irradiance?

1.. Pyrheliometer

2. Anemometer

3. Pyranorneter.

4. Hygrometer

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QUESTION ID:54

Which of the following is primary air pollutant?

1. Surface Ozone

2. Sulphate

3. Nitrate

4. Black carbon

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QUESTION ID:55

Which type of earthworms are most suitable for vermieomposting?

1. Anecic

2. Epigeic

3. Endogeic

4. Both endogeic and epigeic

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QUESTION ID:56

Remote sensing data from which of the following remote sensing satellites is most suitable fot urbart ecological studies?

1. RISAT-2

2. CARTQ'SAT-2

3. LANDSAT-8

4. RESOURCESAT-2 Wifs

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QUESTION ID:57

Cartagena Protocol deals with

1.Waste niailageineht

2 .Pr.otection of plantvafiety

3.Natural r~source ·management

4. Biosafety

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QUESTION ID:58

First State to ma ke rainwater harvesting compulsory in. India is

1. Haryana

2. Tamilnadu

3, Gujarat

4. Madhya Pradesh

https://triyambak.org/courses/ugc-net-environmental-science/tpp/pyq?qid=25912&year=2019&month=June

QUESTION ID:59

For a H² + H³ fusion reaction if the desited confinement for the ionized fuel is 2. seconds what must be the minimum concentration of ions per cubic meter for net gain

of energy?

0.25× 10¹⁹

2.5 × 10¹⁹

5 × 10¹⁹

2 × 10¹⁹

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QUESTION ID:60

As per the amended rules for the implementation of forest Rights Act of 200.6, the transit passes for .the transport of minor forest produce are issued by

Gram Sabha

Forest Department

Biodiversity Monitoring Corrunittee

District Level Committee

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QUESTION ID:61

Municipal Solid Waste·(Management and Handling) Rules 2000 were replaced ·by

Solid Waste. (Managemertt and Handling) Rules, 2016

Solid Waste Management Rules; 2016

Municipal So1id.Waste (Manage11Jentand .Hanclling) Rules,2016

Solid Waste Management (Handling) Rule,.2018

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QUESTION ID:62

As per Occupational Safety and Health Administration hazard communication pictogram of flame over circle represents the hazardous waste to be an

oxidizer

acutelytoxic

explosive

irritant

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QUESTION ID:63

UNEP awarded ·Champion ofEarth' for the year 2018 for environmental contribution towards

(a) Air pollution abatement

(b) Beating,plasti'e pollution

(d) Swachh Bharat Abhiyan

Choose the correct answer from the options given below :

(a) and (d) only

(b) .and (d) only

(a)and (b) only

(b)and (c) only

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QUESTION ID:64

Given.below are two statements. One labelledasAssertion(A) and the other labelled as

Reason (R).

Assertion (A) : The power ·output ftom a windmill is maximum for an optimal

wind speed.

Reason(R) The turbulence· in the atmosphere influences wind energy ·production.

Choose the correct answer from the options given below.

Both (A) and(R) are true and (R) is the correct explanation. of(A)

Both (A) and (R} are true? but (R) is not the eorrectexplanation of(A)

(A) is true, out (R) is .false

(A)-is false , but{R) is true

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QUESTION ID:65

An aeroplane causes .a sound of level 110 dB on.taking off. What is the sound level of 5 such.Identical aeroplanes taking off simultaneously?

~ 117 dB

~115 dB

~113 dB

~110 dB

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QUESTION ID:66

A thennal power plant emits S02 at the rate of 500× 10⁸ug/s Its stack has an effective height of 200 m where wind speed is 5.0 m/s. If the horizontal and vertical dispersion coefficients are 400m and 200 m, respectively, the downwind ground level concentration of S⁰²at a distance of 2 km will be Answer is not confirm

~241-4 µg/m

~206-5 µg/m³

~75-8 µg/m³

~180-6 ug/m³

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QUESTION ID:67

In an ideal magnetoaydrodynamic (MHD) generator the. velocity of fuel gas is increased by· a factor of 1.5 and the magnetic field is increased by a factor of 2. By what factor, the maximum power produced from the MHD generator would increase ?

1. 3

2. 6

3. 9

4.5

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QUESTION ID:68

A stream of waste water having BOD of 20·0 mg/L discharge water at the rate 1·0 m~/s into river with flow rate 8:•.0 m3/s·and BOD of 5·.0 mg/L. Assuming·complete and instantaneous mixing) what is· the resultant BOO just downstream from. the point of discharge?

~12.5 mg/L

~6.7 mg/L

~15.0 MG/L

~1.5 mg/L

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QUESTION ID:69

A country has population of350 million and an annual growth rate of population.2·0% at t= 0. There after the population stab11izes at 1··4 billion How long-it will take for the population

~41.2 Years

~17.9 Years

~5 Years

~35 years

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QUESTION ID:70

Match List-I (Ozone· Depleting Substances) with List-il (Chemical Formulas) :

List-I (Ozone Depleting Substances List- ii (Chemical Formulas

CFC-12 CF2C1CFC12

CFC-113 CCIF2CF3

CFC-114 CF2Cl2

CFC-115 CF2CICF2C1

Choose the correct answer from the options given below:

(a)-(iij); (b}-(~i}; (c)-(i}; (d)-(iv)

a)-(iii); (b)-(i); (e)-(ii); (d)~(iv)

(a}.-{iii); (b}-(i}; (e)-(iv); (d)-(ii)

(a)-(iv); (b)(iii)~ (c)~(ii); (d)-{i)

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QUESTION ID:71

Given-below are two statements One labelled as Assertion.(A) and the other labelled

Reason (R)

Assertion (A) ·The Organic,matter helps in formation and stabilization of soil texture.

Reason (R) · Humified organic matter has an affinity for water and can absorb and

hold water upto several times of its dry weight.

Choose the correct answer from the options given below.

1. Both .(A) and {R) are true and (R) is the correct explanation .of (A)

Both {A) and (R) are true, but(R) is not the·correct explanation of(A)

(A) is true, but (R)is false

(A) is False (R) is true

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QUESTION ID:72

Match List-I(Soil Type) with List-II (Degree of Compressibility):

List-I (Soil Type) List- ii

Softy Clay Low

Clay High

Silt Medium

Sandy Clay Very High

Choose the correct answer from the options given below.

(a)-(i); (b )--(i); ( c)-{iii); (d)-(iv.)

(a)-(iv).. ; (b),(iii);.( c)-(i);. (d)-(ii)

(a)-(iii).; (b)-(ii); (c)-(iv); (d)-(i)

(a:)-(iv); . .(b):-(ii); :( c)-(iii); (d)-(i)

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QUESTION ID:73

A container has 3 white balls and 2 black balls identical' in size. Two balls are drawn randomly without replacement The probability that· the· two baits are of different colours is

2/5

3/5

3/10

2/10

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QUESTION ID:74

If s² is the variance of a sample of size N drawn from a normal population with variance Ns2 then has which one of the following distributions with (N-1) degrees of

freedom?

Chi-square

Normal

Student's t

Poisson

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QUESTION ID:75

Simultaneous measurement of humidity Y (%) and temperature X at a given site are given as under:

Y: 30 X: 40 45 60 65

X: 40 35 30 25 20

The correlation coefficient between Y and X is

-0.987

0.826

0-621

-0.360

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QUESTION ID:76

The marks of students in a certain course· averaged 75 over a period of years. A class of 50 students has a mean marks 70 With a standatd deviation of 10 To test whether this lower mean can be attributed to ordinazy sampling variation t-.statistic required The value of is

-3.5

-0.5

-2.5

+1.5

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QUESTION ID:77

Consider the following simple regression equation of dependent variable (Y:) and explanatory variable (X):

Y=a+bX+€

Given the following data: S² = 250, residual variance = 5, b=0·2 and a = 0·5.

What will be the overall variance Sy²?

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QUESTION ID:78

Two important characteristics of any population are

Diversity and .density

Frequency and density

Abundance and dispersion

Density and dispersion

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QUESTION ID:79

Match List-l (Property) with List-II (Ecological Level) :

List-I (Property List-II (Ecological Level

Fragmentation Community Pero

Assembly Ecosystem

Integrity Population

Dispersion Landscape

Choose the correct answer from the options given below:

(a)-(ii); (b)-(iii); ( c )-(iv); (d)-(i)

(a)-(iii); (b)-(i}; ~c)-(ii); (d)-(iv}

(a)- (iv):; (b)-(i); (e)- (ii);. (d}-(iii)

(a)-(i); (b)-(iii).; (c)-(ii):; (d)-(iv)

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QUESTION ID:80

Match:List;_l(Clay Minerals) with List-II (Cation Exchange Capacity-in cinol(+) .kg-1)

List-I (Clay Minerals) List - ii Cation Exchange Capacity -1 in emol (+) kg¹)

Vermiculite 5-25

Smectite 20-40

Illite 100-120

Kaolinite 150-160

Choose the correct answer from the options given below

(a)-(iv); (b)-(i); (c )-(iii).; ( d)-{ii)

(a)- (i-ii);. (b)-(ii); ( c)- (iv); (d)-(i)

(a)-(i); (b)-.(ii); (c).-(ili); (d)-(iv)

(a)-(iv); (b}-(ili); (c)-{ii); (d)-(i)

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QUESTION ID:81

In urban atmosphere the concentration of CH4 and OH radical is molecules 5 x 10¹⁹ m³and 1.8 X 10³ molecules m^-3 respectively the rate constant for 2nd order reaction between OH and methane is8.36 x 10²¹

3.26 x 10^¹¹molecules m-³s-1

2.52 x 10¹²molecules m-³s-1

7.52 x 10^¹¹molecules m-³s-1

7.52 x 10¹²molecules m-³s-1

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QUESTION ID:82

Computation of radiative forcing due to Greenhouse Gas does NOT involve

Concentration of the Greenhouse Gases present in the atmosphere

Lapse rate of the atmosphere

Wavelength at which the gas molecules absorb

Intensity ofthe absorpti-on·per molecule

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QUESTION ID:83

In a typical solar pond which region has the salt concentration gradient

Surface. convective zone

Non convective zone

Lower convective. zone

Entire solar pond

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QUESTION ID:84

In the model of r- and k selection rate of increase of two species are portrayed as function of

Population·density

Resource density

Habitat

Size

Choose the correct answer from the options given below :

(a) and(c)

(a) and (b)

(b) and (d)

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QUESTION ID:85

Given below are two statements one labelled as Assertion (A) and.the other labelled as

Reason(R).

Assertion.(.A) : In the Himalayas north-facing slopes have luxuriant growth of forests,whereas shruby drought - resistant vegetation inhabits the south- facing slopes

Reason (R)

South facing slopes in the northen hemisphere receive more sunlight than nearby north - facing slopes and ,therefore are warmer and drier .

Choose the correct answer from the options given below :·

Both{A) and (R)'are true and.(R) is·the· correct explanation of(A)

Both (A) and (R) .are true, but(R) is not the correct explanationof(A)

(A) is true, but(R)is false

(A) is false but(R).is true

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QUESTION ID:86

Which microbial metabolism involves immobilisation of soluble .metal species by forming complexing agents.like metal sulphides, .metal carbonates and metal phosphates?

Biosorption

Bioaccumulation

Solubilization

Bioprecipitation

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QUESTION ID:87

The first State to be declared as an. organic State. ofthe country is

Sikkim

Uttarakhand

Himachal Pradesh

Kerala

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QUESTION ID:88

Which among. the following substances is responsible for global cooling instead of global warming?

Black carbon

Nitrous oxide

Sulphate aerosols

HCFC

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QUESTION ID:89

Major environmental impacts of the Tehri dam in the Central Himalaya are :

Submergence of fertile agricultural lands

Reservoir induced seismicity

Increased incidences of landslides in the reservoir rim

Loss of biodiversity

Choose the correct option

(a) and. (b) only

(a) and (c) .only

(a) and (d) only

(a);(b), (c).and (d)

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QUESTION ID:90

Sustainable development presupposes

Maintenance of ecosystem integrity

Improvemerit in economic and social conditions of people

Perpetual availbility of ecosystem services

Choose the correct option:

(a), (b) and (c)

a) and (b) only

(a) and (c) only

(b) and (c)only

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QUESTION ID:91

For a negatively skewed distribution, which is the. correct relation?

Arithmetic mean < Median < Mode

Arithmetic mean < Mode < Median

Arithmetic mean > Mode > Median

Median = Mode > Arithmetic mean

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QUESTION ID:92

Which Article of. the Indian Constitution was used by Government of india to enact the Envirorunental Protection Act (EPA), 1986?

48A

253

251

51 A(g)

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QUESTION ID:93

In a breeder reactor

Neuttons first convert.a fertile material into fissile material and·then sustain the fission recation

Neutrons· first start the fission reaction and fissile material is a by product

Fissile ·material ·produces fertile matetial

Ratio· of amount of fissile material produced to fissile material .consumed should be less than one ·

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QUESTION ID:94

In. a population, where the allele frequency shifts by a random chance, the mechanism of evolution at work is.

Co-evolution

Mutation

Natural selection

Genetic drift

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QUESTION ID:95

Maximum concentration hydroxyl radical in earth's atmosphere is observed at

The equator, in middle troposhere

The poles, in middle of troposhere

The equatorial surface

The Tropic of Cancer

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