CG Board 12th Sample Paper Elements and Mathematics of Agricultural Science

छत्तीसगढ़ माध्यमिक
शिक्षा मण्डल

Model Paper

CGBSE Sample Paper
(Practice Paper)

CGBSE Model Paper
-- AGLASEM --

d{kk&12oha
fo"k; & —f"k foKku ds rRo ,oa xf.kr ¼410½
iw.kkZd 75 le; 3 ?k.Vs

uksV
01- ç'u Øekad 1 oLrqfu"B ç'u gSA blesa nks [k.M gSaA [k.M ¼v½ esa 10
cgqfodYih; ç'u vkSj [k.M ¼c½ esa 5 vfr y?kq mÙkjh; ç'u gSa rFkk çR;sd
ç'u ij 1 vad vkcafVr gSA
Question No. 1 is an objective type question. It has two sections. Section (A)
contains multiple-choice questions and Section (B) contains five very short-
answer questions, each carrying one mark.
02- ç'u Øekad 2 ls 7 rd y?kq mÙkjh; ç'u gSaA çR;sd ç'u ij 2 vad vkcafVr
gSA mÙkj dh vfèkdre 'kCn& lhek 30 'kCn gSA
Questions 2 to 7 are short-answer type questions. Each question carries 2
marks. The maximum word limit for answers is 30 words.
03- ç'u Øekad 8 ls 11 rd y?kq mÙkjh; ç'u gSaA çR;sd ç'u ij 3 vad
vkcafVr gSA mÙkj dh vfèkdre 'kCn lhek 50 'kCn gSA
Questions 8 to 11 are short-answer type questions. Each question carries 3
marks. The maximum word limit for answers is 50 words.
04- ç'u Øekad 12 ls 15 rd nh?kZ mÙkjh; ç'u gSaA çR;sd ç'u ij 4 vad
vkcafVr gSA mÙkj dh vfèkdre 'kCn lhek 75 &100 'kCn gSA
Questions 12 to 15 are long-answer questions. Each question carries 4 marks.
The maximum word limit for answers is 75-100 words.
05- ç'u Øekad 16 ls 19 rd nh?kZ mÙkjh; ç'u gSaA çR;sd ç'u ij 5 vad
vkcafVr gSA mÙkj dh vfèkdre 'kCn&lhek 100 &150 'kCn gSaA
Questions 16 to 19 are long-answer questions. Each question carries 5 marks.
The maximum word limit for answers is 100-150 words.

ç'u1- ¼[k.M v½ lgh fodYi pqudj fyf[k,% [1x10=10]
Question 1 (Section A) Choose the correct option and write:

¼i½ vory ysal esa jSf[kd vkoèkZu lnSo gksrk gS % [1]
¼v½ 1 ;k 1 ls vfèkd ¼c½ 1 ;k 1 ls de
¼l½ 2 ;k 2 ls vfèkd ¼n½ 'kwU;

Model Q-Paper 2025-26 Page 1

The linear magnification of a concave lens is always %
(a) 1 or greater than 1 (b) 1 or less than 1
(c) 2 or greater than 2 (d) zero

¼ii½ vkn'kZ v‚Vks batu dh n{krk gksrh gS: [1]
¼v½ 1 ls vfèkd ¼c½ 1 ls de
¼l½ 2 ls vfèkd ¼n½ 3 ls vfèkd
The efficiency of an ideal auto engine is:
(a) greater than 1 (b) less than 1
(c) greater than 2 (d) greater than 3

¼iii½ og inkFkZ tks fdlh jklk;fud fØ;k ds iw.kZ gksus dh lwpuk jax cnydj
nsrk gS: [1]
¼v½ yo.k ¼c½ vEy
¼l½ {kkj ¼n½ lwpd
A substance that signals the completion of a chemical reaction by changing
its colour is:
(a) salt (b) acid
(c) base (d) indicator

¼iv½ fo"kSyh eLVMZ xSl cukus esa jlk;u mi;ksx fd;k tkrk gS: [1]
¼v½ ,Fksu ¼c½ esFksu
¼l½ ,fFkyhu ¼n½ eSfFkyhu
The Chemical used to prepare Toxic mustard gas:
(a) ethane (b) methane
(c) ethylene (d) methylene

¼v½ jä dk FkDdk tekus ds fy, foVkfeu dh t:jr gksrh gS: [1]
¼v½ A ¼c½ D
¼l½ E ¼n½ K
Vitamin required for blood clotting is:
(a) A (b) D
(c) E (d) K

¼vi½ leckgq f=Hkqt ds çR;sd dks.k dk eku gksrk gS: [1]
¼v½ 30° ¼c½ 60°
¼l½ 80° ¼n½ 90°

Model Q-Paper 2025-26 Page 2

The value of each angle of an equilateral triangle is:
(a) 30° (b) 60°
(c) 80° (d) 90°

¼vii½ ladj.k ls mRiUu ikSèks gksrs gSa: [1]
¼v½ detksj ¼c½ LoLFk
¼l½ vfèkd fucZy ¼n½ dksbZ varj ugha iM+rk
Plants resulting from hybridization are:
(a) Weak (b) Healthy
(c) Weaker (d) No difference

¼viii½ dikl dk oSKkfud uke gS: [1]
¼v½ dSfIlde ,ue ¼c½ lksyus e Vîwcjksle
¼l½ x‚flfi;e fglZqVe ¼n½ dStus l dtku
The scientific name of cotton is:
(a) Capsicum annuum (b) Solanum tuberosum
(c) Gossypium hirsutum (d) Cajanus cajan

¼ix½ ,fFky ,Ydksgy curk gS: [1]
¼v½ v‚Dlh Üolu esa ¼c½ vu‚Dlh Üolu esa
¼l½ ¼v½ vkSj ¼c½ nksuksa esa ¼n½ ¼v½ vkSj ¼c½ nksuksa esa ugha
Ethyl alcohol is produced:
(a) In aerobic respiration (b) In anaerobic respiration
(c) In both (a) and (b) (d) In neither (a) nor (b)

¼x½ jkbtksfc;e dYpj dk mi;ksx gksrk gS: [1]
¼v½ [kkus ds fy, ¼c½ tSo moZjd ds fy,
¼l½ ladj.k ds fy, ¼l½ mi;Zqä lHkh
Rhizobium culture is used for :
(a) For food (b) For biofertilizer
(c) For hybridization (c) All of the above

ç'u-1 ¼[k.M c½ vfr y?kq mÙkjh; ç'u ¼,d 'kCn esa mÙkj½ [1x5=5]
Question 1 (Section B) Very Short Answer type Questions (one-word answers):

¼i½ fHk.Mh ds dqy dk uke fyf[k,A [1]
Write the name of family of Okra.

Model Q-Paper 2025-26 Page 3

¼ii½ fo|qr Å"ed ;k bL=h esa rkj fdl èkkrq dk cuk gksrk gS\ [1]
The wire in an electric heater or iron made of which metal?

¼iii½ lw;Z dk çdk'k fdrus jaxksa ls feydj cuk gS\ [1]
How many colours is sunlight composed of ?

¼iv½ lcls vfèkd çdk'k la'ys"k.k fdl jax ds çdk'k esa gksrk gS\ [1]
In which colour of light does the maximum photosynthesis occur ?

¼v½ c‚fEcDl eksjkbZ dk lkekU; uke D;k gS \ [1]
What is the common name of Bombyx morii ?

ç'u-02 Nk;k ls D;k vfHkçk; gS\ [2]
What is meant by shadow?

ç'u-03 fdlh pkyd ds çfrjksèk vkSj çfrjksèkdrk esa dksbZ nks varj fyf[k,A
[1+1=2]
Write any two differences between resistance and resistivity of a
conductor.

ç'u-04 jlk;u foKku esa rqY;kadh Hkkj fdls dgrs gSa\ vius 'kCnksa esa la{ksi
es le>kb,A [2]
What is equivalent weight in chemistry? Explain in brief in your own
words.

ç'u-05 ekè; vkSj ekfè;dk esa dksbZ nks varj fyf[k,A [1+1=2]
Write any two differences between mean and median.

ç'u-06 eku yhft, ,d ikSèks esa yEck ikSèkk ¼T½ o ckSuk ikSèkk ¼t½ ds xq.k gSA
Tt ×Tt dk ifj.kke fyf[k,A [2]
Suppose a plant has the trait of a tall plant (T) and a dwarf plant (t).
Write the result of Tt × Tt.

ç'u-07 dhVksa ds jklk;fud fu;a=.k ls D;k vfHkçk; gS\ [2]
What is meant by chemical control of insect?

Model Q-Paper 2025-26 Page 4

ç'u-08 lkbfdy dh Vîwc vpkud QVus ij ckgj fudyrh ok;q dks Li'kZ
djus ij gkFk BaMk D;ksa yxrk gS\ bl fl)kar dk mi;ksx fdlh
okLrfod thou esa vkus okys ;a= ;k çfØ;k esa dSls fd;k tk
ldrk gS\ [3]
Why does the air coming out of a bicycle tube suddenly burst feel
cold when touched? How can this principle be applied to a real-life
device or process?

ç'u-09 jkèkk ,d vk;rkdkj dkxt dk VqdM+k ysuk pkgrh gS ftldk
{ks=Qy 54 oxZ lseh gSA ;fn og mldh yEckbZ 6 lseh j[krh gS] rks
mls fdruh pkSM+kbZ dk dkxt dkVuk pkfg, rkfd {ks=Qy leku
jgs\ [3]
Radha wants to take a rectangular piece of paper whose area is 54
square cm. If she keeps its length 6 cm, how wide should she cut the
paper so that the area remains the same?

ç'u-10 ikSèkksa dh o`f) esa v‚fDlu vkSj ftcjsfyu dh Hkwfedk dk fo'ys"k.k
dhft, rFkk muds çHkkoksa esa nks varj Li"V dhft,A [1+2=3]
Analyse the role of Auxin and Gibberellin in plant growth and
explain two differences in their effects.

ç'u-11 ,sjh js'ke dhV vkSj nso ew¡xk js'ke dhV }kjk mRiUu js'ke dh
xq.koÙkk dk rqyuk djrs gq, ewY;kadu dhft, fd bu nksuksa esa ls
dkSu lk js'ke orZeku le; esa vkfFkZd –f"V ls vfèkd mi;ksxh gSA
[3]
Compare the quality of silk produced by the Eri silkworm and the
Devmoonga silkworm and evaluate which of these silk is more
economically useful today.

ç'u-12 fo|qr okgd cy vkSj foHkkokarj esa pkj varj fyf[k,A [1x4=4]
Write four differences between electromotive force and potential
difference.

vFkok@OR
okLrfod LisDVªe vkSj vkHkklh LisDVªe esa pkj varj fyf[k,A
Write four differences between a real spectrum and an apparent
spectrum.

Model Q-Paper 2025-26 Page 5

ç'u-13 esFksu vkSj ,fFkyhu ds fdUgh pkj xq.kksa dk ewY;kadu dhft,A
[1x4=4]
Evaluate any four properties of methane and ethylene.
vFkok@OR
,fFkyhu vkSj ,flfVyhu ds dksbZ pkj mi;ksx dk ewY;kadu dhft,A
Evaluate any four uses of ethylene and acetylene.

ç'u- 14 ,d o`Ùk dk O;kl 14 ehVj gSA o`Ùk dh ifjfèk ,oa {ks=Qy Kkr
dhft,A
The diameter of a circle is 14 meters. Find the circumference and area
of the circle [2+2=4]
vFkok@OR
,d lkbfdy ds ifg, dk O;kl 42 lseh gSA 150 pDdj yxkus esa
og fdruh nwjh r; djsxk\
The diameter of a bicycle wheel is 42 cm. How long distance will it
cover in 150 revolutions?

ç'u-15 yk[k dhV ds vè;;u gsrq fuEufyf[kr fcanqvksa ij vkèkkfjr ,d
ç;ksxkRed fooj.k rS;kj dhft, %& [1+(1+2)=4]
¼v½ yk[k dhV dk oSKkfud uke
¼c½ blds nks çeq[k ikS"kd ikSèkksa dk mYys[k dhft, rFkk thou pØ
dk laf{kIr o.kZu dhft,A
Prepare an experimental report to study the lac insect based on the
following points:
(i) Scientific name of the lac insect
(ii) Mention its two main host plants and briefly describe its life cycle.

vFkok@OR
eèkqeD[kh ds vè;;u gsrq fuEufyf[kr fcanv
q ksa ij vkèkkfjr ,d
ç;ksxkRed fooj.k rS;kj dhft, %&
¼v½ eèkqeD[kh dk oSKkfud uke
¼c½ blds lkekftd thou dk mYys[k dhft, rFkk thou pØ dk
laf{kIr o.kZu dhft,A
Prepare an experimental report to study Honeybees based on the
following points:
(i) Scientific name of Honeybee
(ii) Mention its social life and briefly describe its life cycle.

Model Q-Paper 2025-26 Page 6

ç'u- 16 ;wfj;k cukus dh fofèk dk o.kZu fuEu 'kh"kZdksa esa dhft, [1+4=5]
¼v½ lajpuk lw= A
¼c½ ç;ksx'kkyk fofèk lehdj.k lfgr A
Describe the method of preparing urea under the following headings:
(i) Structural formula.
(ii) Laboratory method with equation.

vFkok@OR
Xywdkst cukus dh fofèk dk o.kZu fuEu 'kh"kZdksa esa dhft,%
¼v½ lajpuk lw= A
¼c½ ç;ksx'kkyk fofèk lehdj.k lfgr A
Describe the method of preparing glucose under the following
headings:
(i) Structural formula
(ii) (ii) Laboratory method with equation

ç'u& 17 fuEu lkj.kh esa dqy Nk=ksa ds çkIrkadks dk fooj.k fn;k x;k gSA
vadks dk cgqyd Kkr dhft,% [5]

vad 0&10 10&20 20&30 30&40 40&50
ckjEckjrk 5 12 20 9 4

The following table details the marks obtained by all students. Find the Mode of
the marks:

Marks 0&10 10&20 20&30 30&40 40&50
Frequency 5 12 20 9 4

vFkok@OR
fdlh i'kq'kkyk esa i'kqvksa ij vkus okyk [kpZ fuEukuqlkj gS] rks [kpZ dk ekud
fopyu Kkr dhft,%

oxZ 0&100 100&200 200&300 300&400 400&500
i'kq 6 10 4 2 1

Model Q-Paper 2025-26 Page 7

If the expenditure on animals in a cattle farm is as follows, find the
Standard Deviation of the expenditure:

Category 0-100 100-200 200-300 300-400 400-500

Animal 6 10 4 2 1

ç'u%18 fdlh u, mPp mRiknd vkSj jksx çfrjksèkh ikSèk fdLe dks çkIr
djus ds fy, ladj.k dh iwjh çfØ;k dh ;kstuk cukb,A [5]
Plan the complete hybridization process to obtain a new, highly
productive and disease-resistant plant variety.

vFkok@OR
;fn vkidks fdlh Qly dh mit ,oa jksx çfrjksèkdrk c<+kus ds
mís'; ls cgqxfq .krk mRiUu djuh gks] rks vki fdl çdkj ç;ksx dh
;kstuk cuk,axaAs
If you were to create polyploidy to increase the yield and disease
resistance of a crop, how would you plan the experiment?

ç'u% 19 esaMy ds f}ladj Ø‚l dks le>kb,A [5]
Explain the Dihybrid cross of the Mendal.

vFkok@OR
ØwlhQsjh dqy ds ikSèks dk vkfFkZd egRo dks la{ksi es le>kb,A
Briefly explain the economic importance of plants of the Cruciferae
family.

Model Q-Paper 2025-26 Page 8

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