Rajasthan Board Class 12 Question Paper 2026 Environment Science

FOR RAJASTHAN CLASS 12 PREPARATION

Rajasthan Board Class
12 Question Paper 2026
Environment Science
EXAM YEAR TYPE SUBJECT

Rajasthan Class 12 2026 Question Paper Science

Notes · Sample Papers · Previous Year Papers · Mock Tests

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Zm_m§H$ Roll No. Question Booklet No.

No. of Questions – 18 SS-61-EVS
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No. of Printed Pages – 11
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SENioR SEcoNdaRy ExamiNatioN, 2026

n`m©daU {dkmZ
ENViRoNmENtal SciENcE
g_` : 3 KÊQ>o 15 {_ZQ>
nyUmªH$ : 56 m
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narjm{W©`m| Ho$ {bE gm_mÝ` {ZX}e :
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General InstructIons to the examInees :

1) narjmWu gd©àW_ AnZo àíZ nÌ na AnZm Zm_m§H$ A{Zdm`©V: {bI| &
Candidate must write first his/her Roll No. on the question paper
compulsorily.
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c. 2)o g^r àíZ H$aZo A{Zdm`© h¢ & m.co
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g la all the questions are compulsory.
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3) àË`oH$ àíZ H$m CÎma Xr JB© CÎma-nwpñVH$m _| hr {bI| &
Write the answer to each question in the given answer-book only.

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4) {OZ àíZm| _| AmÝV[aH$ IÊS> h¢, CZ g^r Ho$ CÎma EH$ gmW hr {bI| &

For questions having more than one part, the answers to those parts are to

be written together in continuity.

5) àíZ nÌ Ho$ {hÝXr d A§J«oOr ê$nmÝVaU _| {H$gr àH$ma H$s Ìw{Q> / AÝVa / {damoYm^mg hmoZo
na {hÝXr ^mfm Ho$ àíZ H$mo hr ghr _mZ| &

If there is any kind of error / difference / contradiction in the Hindi and

English versions of the question paper, the question of Hindi version should

be treated valid.

6) àíZ H$m CÎma {bIZo go nyd© àíZ H$m H«$_m§H$ Adí` {bI| &

Write down the serial number of the question before attempting it.

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IÊS> - A
SEctioN – a

~hþ{dH$ënr` àíZ (i go xviii) : {ZåZ àíZm| Ho CÎma H$m ghr {dH$ën M`Z H$a
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CÎma-nwpñVH$m _| {b{IE . co
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Multiple choice questions (i to xviii) : Answer the following questions by
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selecting the correct option and write them in the answer sheet.
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i) a{ZåZ{b{IV _| go dm`w_§S>b H$m ñVa Omo nam~¢JZr {d{H$aUm| (UV radiations) H$m
AdemofU H$aVm h¡ [½]
A) Q´>monmoñ\$s`a ~) ñQ´>oQ>moñ\$s`a
g) _rOmoñ\$s`a X) Am`Zmoñ\$s`a
Which of the following level of atmosphere which absorbs Ultra Violet
radiations ?
A) Troposphere B) Stratosphere
C) Mesosphere D) Ionosphere m
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ii) hmBS´>moH$m~©Ýg loUr Ho$ àXÿfH$ H$m CXmhaU h¡
s ~) H$m~©Z _moZmoAm°ŠgmBS>
[½]
A) _rWoZ
l a
g) ŠbmoamoâbwamoH$m~©Ýg ag X) ZmBQ´>moOZ S>mBAm°ŠgmBS>
An example of hydrocarbons category pollutant is
A) Methane B) Carbon monoxide
C) Chlorofluorocarbons D) Nitrogen dioxide

iii) ewÕ Ob H$m pH _mZ hmoVm h¡ & [½]
A) 2 go 3.5 Ho$ ~rM ~) 12 go 13.5 Ho$ ~rM
g) 11 go 12.5 Ho$ ~rM X) 7 go 8.5 Ho$ ~rM m
m pH value of pure water is .co
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B) between 12 to 13.5
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D) between 7 to 8.5
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g la iv) {ZåZ{b{IV _| go EŠg-{H$aUm| Ho$ {d{H$aU H$s BH$mB© h¡ & a
a A) S>o{g~b ~) Ho$pëdZ
[½]

g) amoE§Q>mOZ X) nm°ñH$b
Which of the following is the unit of x-rays radiation ?
A) Decibel B) Kelvin
C) Roentgen D) Pascal
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v) Ob _| ZmBQ´>oQ> H$s A{YH$ _mÌm hmoZo go hmoZo dmbm amoJ h¡ [½]
A) _oQ>hr_mo½bmo{~Zo{_`m ~) BVmB©-BVmB©
g) âbmoamo{gg X) E_r~m`{gg
The disease caused by excessive amount of nitrates in water is
A) Methaemoglobinamia B) Itai-Itai
C) Fluorosis D) Amoebiasis

vi) {ZåZ{b{IV _| go h[aV J¥h J¡g H$m CXmhaU h¡ [½]
A) N2 ~) O2
g) H2 X) CO2
An example of green house gas is
A) N2 B) O2
C) H2 D) CO2

vii) amîQ´>r` n`m©daU A{^`§m{ÌH$s emoY g§ñWmZ (NEERI) H$hm± pñWV h¡ ? [½]
A) H$mZnwa ~) ZmJnwa
g) h¡Xam~mX X) bIZD$
Where is National Environmental Engineering Research Institute
(NEERI) is located ?
A) Kanpur B) Nagpur
C) Hyderabad D) Lucknow

viii) {ZåZ{b{IV _| go {ÛVr`H$ dm`w àXÿfH$ h¡ [½]
A) SO2 ~) H2S
g) O3 X) NO
Which of the following is a secondary air pollutants ?
A) SO2 B) H2S
C) O3 D) NO

ix) ZdrH$aUr` àmH¥${VH$ g§gmYZm| H$m CXmhaU h¡ [½]
A) gm¡a D$Om©, Ádmar` D$Om© ~) ndZ D$Om©, Ordmí_ B§YZ
g) gm¡a D$Om©, I{ZO nXmW© X) Ordmí_ B§YZ, I{ZO nXmW©
The examples of renewable natural resources is
A) Solar energy, Tidal energy B) Wind energy, Fossil fuel
C) Solar energy, Minerals D) Fossil fuel, Minerals
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x) AY©MmbH$ {OZHo$ Ûmam \$moQ>modmoëQ>mBH$ gm¡a noZëg {Z{_©V {H$`o OmVoo h¡ ? [½]
A) Eoë`w{_{Z`_ ~) Mm±Xr g) H$m°na X) {g{bH$moZ
Semiconductors from which photovoltaic solar panels are manufactured ?
A) Aluminium B) Silver C) Copper D) Silicon
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xi) “ n`m©daU ( g§caojU) A{Y{Z`_” {H$g gZ² _| bmJy hþAm Wm ? [½] m
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A) 1974
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g) a1972
e ~) 1980
g l a
g lwhich year was the “Environment (Protection) Act” implemented ?a
X) 1986
aIn
A) 1974 B) 1980
C) 1972 D) 1986

xii) ñQ>m°H$hmo_ gå_obZ _| POPs _| gpå_{bV 12 agm`Zm| H$mo {H$VZr lo{U`m| _| aIm J`m
Wm ? [½]
A) Xmo ~) VrZ
g) Mma X) m
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In how many categories 12 chemicals included in POPs at the
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Stockholm convention were divided ?
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A) Two g
B) Three
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C) Four D) Five

xiii) {ZåZ{b{IV _| go Ho$MwE {H$g \$mBb_ go g§~§{YV h¡ ? [½]
A) EZr{bS>m ~) nm°ar\o$am
g) AmW«m©onmoS>m X) _mobñH$m
Which of the following phylum earthworm belongs ?
A) Annelida B) Porifera m
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C) Arthropoda D) Mollusca
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em xiv) Or{dV Ord `m CZgo àmßV CËnmXm| Ûmam H$s OmZo dmbr noñQ> g{Z`§laÌU H$s {d{Y h¡
las A) `m§{ÌH$ {Z`§ÌU ~) ñdmñÏ` {Z`§aÌU
[½]

ag g) O¡{dH$ {Z`§ÌU X) amgm`{ZH$ {Z`§ÌU
Live organisms or products obtained from them used for pest
management technique is
A) Mechanical control B) Sanitary control
C) Biological control D) Chemical control
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xv) O¡d g§gmYZ H$m CXmhaU h¡ [½]
A) _¥Xm ~) OÝVw g) MÅ>mZ X) I{ZO
An example of biotic resource is
A) Soil B) Animal C) Rock D) Mineral

xvi) Ob g§ajU hoVw ~Zm`m OmZo dmbm Am`VmH$ma nŠH$m Hw$ÊS> {OgHo$ VrZ Amoa gr{‹T>`m±
~Zr hmoVr h¡ H$hbmVm h¡ [½]
A) ZmS>r/Vmbm~ ~) Hw$B©
g) Q>m§H$m X) Pmbam
A rectangular concrete pond which has stairs on three side built for
water conservation is called
A) Nadi B) Kui
C) Tanka D) Jhalra

xvii) _mZdO{ZV AmnXm H$m CXmhaU h¡ [½]
A) MH«$dmV ~) ^yH$ån
g) ^yñIbZ X) Zm{^H$s` {dñ\$moQ>
An example of man made disaster is
A) Cyclone B) Earthquake
C) Landslide D) Nuclear explosion

xviii) dZm| Ho$ g§ajU hoVw H$Zm©Q>H$ _| MbmE JE Am§XmobZ H$m Zm_ h¡ & [½]
A) ApßnH$mo Am§XmobZ
~) Z_©Xm Am§XmobZ
g) npíM_r KmQ> ~MmAmo Am§XmobZ
X) em§V KmQ>r Am§XmobZ
Name of movement which was run for the protection of forest in
Karnataka.
A) Appiko movement
B) Narmada movement
C) Save Western Ghat movement
D) Silent valley movement
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2. [aŠV ñWmZm| H$s ny{V© H$s{OE &
Fill in the blanks.

i) Am¡Úmo{JH$ g§`§Ìm| H$mo R>ÊS>m H$aZo Ho$ níMmV² Omo Ja_ Ob nwZ… ZXr `m Prbm| _o§
m
AmH$a {_bVm h¡ Cggo ______ àXÿfU hmoVm h¡ &
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After cooling the industrial plant the hot water that reaches river or
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lakes causes ______ pollution.
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l _| nrZo Ho nmZr H$s JwUdÎmm Ho$ _mZH$m| H$m {ZYm©aU ______ Ûmam {H$`m OmVm h¡a& [½]
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ii) ^maV
______ decides the standards of drinking water quality in India.

iii) gy`© EH$ àmH¥${VH$ ______ [aEŠQ>a h¡ & [½]
Sun is the natural ______ reactor.

iv) Obdm`w n[adV©Z na amîQ´>r` H$m`© `moOZm (NAPCC) H$s ewéAmV gZ² _______| hþB© & [½]
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National Action Plan on Climate Change (NAPCC) was started in the
year ______.
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l asg§emoYZ Ho$ VhV AZwÀN>oX 48A Am¡a ______
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v) ^maVr` g§{dYmZ _| 42 d| g§{dYmZ
Omo‹S>o J`o h¡ & [½]
In Indian Constitution Articles 48A and ______were added in the 42nd
constitutional amendment.

vi) dÝ` Ord (g§ajU) A{Y{Z`_ H$m _w»` CÔoí` ______ Ho$ g§ajU d à~§YZ H$mo
gw{ZpíMV H$aZm h¡ & [½]
The main objective of the wild life (Protection) Act is to ensure the m
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conservation and management of ______.
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s e laAm¡a Adm`dr`
vii) ______ J_© Am¡a Z_ dmVmdaU _| H$m~©{ZH$ nXmWm] H$s dm`dr`
g
g la {dKQ>Z à{H«$`m h¡ & a
a
[½]
______ is the process of aerobic and anaerobic decomposition of
organic matter in the hot and wet environment.

viii) ______ CËnmXZ Ho$ {bE gd©àW_ GMO OrdmUwAm| H$m Cn`moJ {H$`m J`m Wm & [½]
GMO bacteria were first used for ______ production.
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ix) {MnH$mo Am§XmobZ dV©_mZ ______ amÁ` _| gZ² 1973 _| àmaå^ hþAm Wm & [½]
The Chipko Movement was started in the present _______ State in 1973.

x) gZ² 1930 _| OmoYnwa [a`mgV Ho$ ______ Jm§d H$s A_¥Vm {~íZmoB© Zo IoO‹S>r Ho$ no‹S>
H$mQ>Zo H$m {damoY {H$`m & [½]
In 1930, Amrita Bishnoi of ______ village of Jodhpur State protested
against cutting Khejari trees.

3. A{VbKwÎmamË_H$ àíZ & {ZåZ{b{IV àíZm| Ho$ CÎma EH$ eãX `m EH$ n§pŠV _| Xr{OE &
Very short answer type questions. Answer the following questions in one
word or one line.

i) ^y{_ `m _¥Xm àXÿfU H$m EH$ ñÌmoV {b{IE & [1]
Write one source of land or soil pollution.

ii) {dÚwV Mwå~H$s` {d{H$aU H$m EH$ CXmhaU Xr{OE & [1]
Write one example of Electromagnetic radiation.

iii) D$Om© g§ajU hoVw AnZmE OmZo dmbm EH$ Cnm` {b{IE & [1]
Write one measure applied for energy conservation.

iv) h[aV AW©ì`dñWm H$mo n[a^m{fV H$s{OE & [1]
Define green economy.

v) Ob ( àXÿfU {ZdmaU VWm {Z`§ÌU) A{Y{Z`_ H$s EH$ {deofVm ~VmBE & [1]
Mention one feature of water (Prevention and control of pollution) Act.

vi) ñQ>m°H$hmo_ gå_obZ H$m _w»` CÔoí` {b{IE & [1]
Write main objective of Stockholm convention.

vii) gyú_Ordm| Ûmam g§XÿfH$mo§ Ho$ nyU© I{ZOrH$aU níMmV² àmßV CËnmX {b{IE & [½+½=1]
Write the product obtained after complete mineralization of
contaminant by microorganisms.

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viii) g_pÝdV noñQ> à~§YZ Š`m h¡ ? [1]
What is integrated pest management ?

ix) n`m©daU {ejm H$m H$m©B© EH$ CÔoí` {b{IE & [1]
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Write any one objective of environmental education. . co
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x) ^monmb J¡g ÌmgXr {H$g J¡g Ho$ [agmd go hþB© ?
l gas leakage caused the Bhopal gas tragedy ? ag [1]

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Which

IÊS> - ~
SEctioN – B

bKwÎmamË_H$ àíZ : (CÎma eãX gr_m bJ^J 30 eãX)
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Short answer type questions : (Answer word limit approximately 30 words)

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4. AmoOmoZ Adj` Ho$ H$maU g_PmBE &
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Explain causes of ozone depletion.

5. O¡d g§Ho$VH$ H$mo n[a^m{fV H$s{OE & O¡d g§Ho$VH$ H$m EH$ CXmhaU Xr{OE & [1+½=1½]
Define bioindicators. Give one example of bioindicator.

6. àmH¥${VH$ g§gmYZm| H$s lo{U`m| H$mo g_PmBE & [1½]
Explain the categories of natural resources.
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7. mVrZ R’s g§H$ënZm _| nwZ…MH«$U H$mo g_PmBE &
c. o In three R’s concept explain recycling. .co
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[1½]

em l as
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la 8. _mopÝQ´>`b AmboI H$s {deofVm {b{IE & ag
ag [1½]
Write the characteristics of Montreal Protocol.

9. dZ g§ajU A{Y{Z`_ H$s VrZ {deofVm {b{IE & [½+½+½=1½]
Write three features of Forest Conservation Act.

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10. noñQ>rgmBS> CnMmaU H$s aUZr{V H$mo g§{jßV _o§ {b{IE & [1½]
Write strategies for pesticide remediation in short.

11. gm_wXm{`H$ H$Mam nmÌ Ho$ àmê$n H$m Zm_§m{H$V {MÌ ~ZmBE & [1½]
Draw a labelled diagram of the design of a community dustbin.

12. ^yñIbZ H$mo amoH$Zo Ho$ Cnm` {b{IE & [1½]
Write measures to control landslides.

13. {H$Ýhr VrZ Obr` AmnXm Ho$ CXmhaU {b{IE & [½+½+½=1½]
Write any three examples of disasters caused by water.

IÊS> - g
SEctioN – c

XrK© CÎmar` àíZ : (CÎma eãX gr_m bJ^J 60 eãX)
Long answer type questions : (Answer word limit approximately 60 words)

14. gVV²Vm g§H$ënZm Ho$ VrZ _w»` _mnX§S> g_PmBE & [1+1+1=3]
Explain three main measures of sustainability concept.

AWdm/OR
dm`w Q>a~mBÝg H$s H$m`©e¡br g_PmBE &
Explain the working of Wind turbines.

15. Š`moQ>mo àmoQ>moH$mob na g§{jßV {Q>ßnUr {b{IE & [3]
Write short note on Kyoto Protocol.

AWdm/OR
n`m©daU H$mZyZ H$mo bmJy H$aZo _| AmZo dmbr {H$Ýhr VrZ ~mYmAm| H$mo g§{jßV _| g_PmBE &
Explain any three issues faced enforcing environmental laws.

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16. dZ g§ajU _| ^maVr` naånamAm| Ho$ `moJXmZ H$mo g_PmBE & [3]
Explain contribution of Indian traditions in forest conservation.

AWdm/OR
m
o m naånamAm| Ho$ `moJXmZ H$mo g_PmBE & . co
dÝ`Ord g§ajU _|c^maVr`
. e m
e m
Explain contribution of Indian traditions in wildlife conservation. l as
la s ag
ag IÊS> - X
SEctioN – d

{Z~§YmË_H$ àíZ : (CÎma eãX gr_m bJ^J 120 eãX)
Essay type questions : (Answer word limit approximately 120 words)

17.
o m
àXÿfU H$mo n[a^m{fV H$s{OE & dm`w àXÿfU Ho$ hm{ZH$maH$ à^mdm| H$mo g_PmBE & [1+3=4]
c
Define pollution. Explain harmful effects. of air pollution.
e m
AWdm/OR las
ag
O¡d agm`{ZH$ Am°ŠgrOZ _m§J (BOD) H$mo n[a^m{fV H$aVo hþE BgHo$ _hËd H$mo g_PmBE &
Define Biochemical Oxygen Demand and explain its importance.

18. R>mog H$Mam à~ÝYZ à{H«$`m Ho$ à_wI MaUm| H$mo aoIm{MÌ âbmoMmQ>© ~ZmVo hþE g_PmBE & [4]
Explain the main steps of the solid waste management process by drawing a
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diagram/flowchart.
m
m .co AWdm/OR
s em
s e g a
l{MÌ
g la a
An{eîQ> Ob CnMma Ho$ O¡{dH$ CnMma H$s Adm`dr` {d{Y H$mo aoIr` Ûmam g_PmBE &
a Explain the anaerobic Biological method of waste water treatment through a
diagram.

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RE
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HI
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NO
DO

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