Uttarakhand Board Class 10 Sample Paper 2026 Science

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UBSE Sample Question Papers 2026

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2026
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SAMPLE QUESTION PAPER
foKku SCIENCE (033)

Lke; % 3 ?kaVk iw.kkZad % 80
Time : 3 Hours Max. Marks : 80

funsZ”k (Directions) :
i) bl iz”u i= esa dqy 27 iz”u gSAa lHkh iz”u vfuok;Z gSAa
There are 27 questions in this paper. All questions are Compulsory.
ii) iz”uksa gsrq fu/kkZfjr vad muds lEeq[k vafdr gSaA
Marks allotted to the question are mentioned against them.
iii) izR;sd iz”u dks /;kuiwoZd if<+;s rFkk leqfpr mRrj nhft,A
Read each question carefully and answer to the point.
iv) iz”u la[;k 1 cgqfodYih; iz”u gSA bl iz”u ds izR;sd [kaM ds mRrj esa pkj fodYi fn;s x,
gSaA lgh fodYi viuh mRrjiqfLrdk esa fyf[k,A
Question No.1 is multiple choice question. Four options are given in answer of each part
of the question. Write correct option in your answer book.
v) iz”u la[;k 2 [email protected] ls lacfU/kr iz”u gS ftlesa izR;sd [kaM ds fy, pkj fodYi fn;s x,
gSAa lgh fodYi viuh mRrjiqfLrdk esa fyf[k,A
Question No. 2 is related to Assertion/Reason type question. Four options are given in
answer of each part of the question. Write correct option in your answer book.
vi) iz”u la[;k 1 o iz”u la- 2 dk izR;sd [kaM ,d (1) vad dk gSA iz”u la[;k 3 ls 6 rd ,d
(1) vad ds iz”u gaSA iz”u la[;k 7 ls 12 rd nks (2) vad ds iz”u gaSA iz”u la[;k 13 ls 20 rd
rhu (3) vad ds iz”u gaSA iz”u la[;k 21 ls 26 rd pkj (4) vad ds iz”u gaSA iz”u la[;k 27
dsl LVMh ls lacfU/kr iz”u pkj vad (1+1+2) dk gSA
Each part of question No. 1 and question no.2 carries one (1) mark. Question no. 3 to 6 is
of one (1) mark each. Question No.7 to 12 is of two (2) marks each. Question no.13 to 20
are of three marks (3) each. Question No. 21 to 26 are of four marks (4) each. Question no.
27 related to case study question carries 4 marks (1+1+2).
vii) bl iz”u i= esa lexz ij dksbZ fodYi ughsa gS rFkkfi dfri; iz”uksa esa vkarfjd fodYi iznku
fd;k x;k gSA ,sls iz”uksa esa dsoy ,d fodYi dk gh mRrj nhft,A
There is no overall choice in this question paper, however an internal choice has been
provided in few questions. Attempt only one of the given choices in such questions.

1

1- cgqfodYih; ç”u ¼MCQs½& 1X10=10

d½ fuEu esa dkSu lh v/kkrq fo|qr dh pkyd gSA
i) lYQj ii) QkLQksjl iii) xzsQkbV iv) Dyksjhu
Which of these non-metals is a good conductor of electricity?
i) Sulphur ii) Phosphorus iii) Graphite iv) Chlorine

[k½ f}rh; ih<+h (F2)esa vçHkkoh y{k.kksa ds iqu% çdV gksus dh O;k[;k esMa y dk dkSu lk fu;e djrk
gSA
i) çHkkfork dk fu;e ii) Ik`FkDdj.k dk fu;e
iii) Lora= vIkO;wgu dk fu;e iv) vkuqoaf”kdrk dk fu;e
Which of Mendel’s principal accounts for the appearance of recessive traits in the second
filial generation (F2)?
i) Law of Dominance ii) Law of Segregation
iii) Law of Independent Assortment iv) Law of Inheritance

Xk½ fuEu esa ls dkSu ls xq.klw= la;kstu ls ekuo esa iq=h tUe ysrh gSA
i) XX ii) XY iii) YY XO
iv)
Which of the following chromosome combinations will produce girl child in humans?
i) XX ii) XY iii) YY iv) XO

?k½ tc “osr çdk”k fçTe esa ços”k djrk gS rks lkr jaxksa esa VwV tkrk gSA buesa ls fdl jax dk
fopyu lcls vf/kd gksrk gS\
i) yky ii) uhyk iii) gjk iv) cSaxuh
When white light passes through a prism, it is dispersed into seven colours, which colour
will deviate the most?
i) Red ii) Blue iii) Green iv) Violet

³½ fuEufyf[kr esa ls dkSu lk foy;u uhys fyVel dks yky dj nsxk\
i) lksfM;e DyksjkbM ii) iksVfs ”k;e gkbMªkDlkbM
ii) gkbMªkDs yksfjd vEy iv) lksfM;e dkcksZuVs
Which of the following solutions will turn blue litmus red?
i) Sodium chloride ii) Potassium hydroxide
ii) Hydrochloric acid iv) Sodium carbonate

p½ Ekkuo us= dk dkSu lk Hkkx mlesa ços”k djus okys çdk”k dh ek=k dks fu;af=r djrk gSA
i) jsfVuk ii) ysal iii) vkbfjl iv) n`d~ raf=dk
Which part of the human eye controls the amount of light entering?
i) Retina ii) Lens iii) Iris iv) Optic nerve

N½ fo|qr çfrjks/kdrk dk SI ek=d gSA
i) Ωm-3 ii) Ωm-1 iii) Ωm-2 iv) Ωm

SI Unit of Electrical resistivity-
i) Ωm-3 ii) Ωm-1 iii) Ωm-2 iv) Ωm

2

Tk½ fdlh fcEc dk vory niZ.k }kjk cuk çfrfcac vkHkklh lh/kk rFkk fcEc ls cM+k ik;k x;kA oLrq
dgk¡ fLFkr gksxh\
i) eq[; Qksdl rFkk oØrk dsUnz ds chp ii) oØrk dsUnz ij
ii) oØrk dsUnz ds ihNs iv) niZ.k ds /kzqo rFkk eq[; Qksdl ds chp esa
If a virtual, erect, and magnified image of an object is formed by a concave mirror. Where
is the object located?
i) Between the principle focus and center of curvature
ii) At the center of curvature
iii) Behind the center of curvature
iv) Between the pole of the mirror and principle focus

>) tho eaMy esa ÅtkZ dk eq[; Lkzkrs gS&
i) ok;q ii) lw;Z iii) ikS/ks iv) ijek.kq ÅtkZ
The main source of energy in a biosphere is –
i) Air ii) Sun iii) Plant iv) Atomic energy

¥) dkSu lh ekuoh; xfrfof/k vkstksu ijr dks lcls vf/kd gkfu ig¡qprh gS&
i) fo|qr okgu dk mi;ksx ii)- CFC mRltZu esa o`f)
ii) o’kkZ ty lap;u iv) ouhdj.k
Which human activity can cause the highest level of ozone layer depletion?
i) Use of electric vehicles ii) Increased CFC emission
ii) Rainwater harvesting iv) Afforestation

2- fuEufyf[kr iz”u [k.Mksa esa nks dFku fn;s x;s gSa ftues ,d dks dFku ¼Assertion-A½ rFkk nwljs dks
dkj.k ¼Reason-R½ }kjk vafdr fd;k x;k gSA uhps fn, x, pkj fodYiksa esa ls fuEufyf[kr ç'u
[k.Mksa ds lgh mÙkj dk p;u dhft;s&
There are two statements given below, one as Assertion (A) and the other labeled as Reason
(R). Select the correct answer to these questions from the given four options below.
v& dFku ¼A½ % eSXuhf”k;e fjcu dks ok;q esa tykus ls igys lkQ djuk pkfg,A 1
dkj.k ¼R½ % eSXuhf”k;e fjcu dh lrg ij cuh vWkDlkbM dh ijr mls tyus ls jksdrh gSA
a½ dFku A vkSj R nksuksa lgh gSAa R, A dh lgh O;k[;k djrk gSA
b½ dFku A vkSj R nksuksa lgh gSa ijUrq R, A dh lgh O;k[;k ugha djrk gSA
c) dFku A lgh gS ijUrq dkj.k R xyr gSA
d½ dFku A xyr gS ijUrq dkj.k R lgh gSA
Assertion (A): Magnesium ribbon should be cleaned before burning in air.
Reason: - (R) The oxide layer formed on the surface of magnesium ribbon prevent it from
burning.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.

c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.

3

c& vfHkdFku ¼A½ % ?kjsyw fo|qr ifjiFk lekUrj la;kstu esa gksrs gSA 1
dkj.k ¼R½ % lekUrj ifjiFk esa çR;sd midj.k dks leku oksYVst çkIr gksrh gS] vkSj ;fn ,d
midj.k [kjkc gks tk, rks Hkh vU; dke djrs jgrs gaSA
a½ dFku A vkSj R nksuksa lgh gSAa R, A dh lgh O;k[;k djrk gSA
b½ dFku A vkSj R nksuksa lgh gSa ijUrq R, A dh lgh O;k[;k ugha djrk gSA
c) dFku A lgh gS ijUrq dkj.k R xyr gSA
d½ dFku A xyr gS ijUrq dkj.k R lgh gSA
Assertion (A) : Household electric circuits are wired in parallel.
Reason (R) : In a parallel circuit, each appliance receives the same voltage, and if one device fails,
others continue to work.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.

3- /kkou lksMk dk jklk;fud uke rFkk lw= fyf[k,A 1
Write the chemical name and formula of washing soda.

4- ikS/ks viuk Hkkstu cukus ds fy, dkSu lh çfØ;k dk mi;ksx djrs gSa? 1
What process do plants use to make their own food?

5- 50 lseh0 Qksdl nwjh okys vory ysal dh {kerk D;k gksxh? 1
What is the power of a concave lens of focal length 50 cm?

6- og çfØ;k ftlesa gkfudkjd inkFkZ [kkn~; J`[a kyk eas ços”k djrs gS vkSj mPp iks’k.k Lrjksa ij mudh
lkUnzrk c<+rh tkrh gS] D;k dgykrh gS? 1
Name the process by which harmful substances enter the food chain and their concentration
increases at higher tropic levels?

7- O;k[;k dhft,] D;ksa\ 1+1=2
d) lksfM;e dks feV~Vh ds rsy esa Mqckdj j[kk tkrk gSA
[k) ,Y;wehfu;e vius pkjksa vksj dBksj lqj{kk ijr cuk ysrk gSA
Explain why-
a) Sodium is stored under kerosene.
b) Aluminum forms hard protective layer on its surface.

8- ,FksukWy dks ,Fksuksbd vEy esa dSls ifjofrZr fd;k tk ldrk gS\ vfHkfØ;k fyf[k,A 2
How can ethanol be converted to ethanoic acid? Write the reaction.

4

9- thoksa esa vySfa xd tuu dh fdUgha nks fof/k;ksa dk mnkgj.k lfgr o.kZu djksA 2
Describe any two methods of asexual reproduction in organisms.

10- ifjokj fu;kstu ds rjhdksa dk mi;ksx tula[;k fu;a=.k esa dSls enn djrk gS\ 2
How do family planning methods help in controlling the population?

11- ,d cPpk vius firk ds p”es ds lkFk [ksyrs gq, mlls lw;Z dh fdj.kksa dks dsfUnzr djds ,d dkxt
esa NksVk Nsn tyk nsrk gSA 1+1=2
d½ mlds firk fdl n`f’V nks’k ls ihfM+r gSa\
[k½ bl nks’k dk fuokj.k fdj.k vkjs[k ls le>kb;sA
A child, while playing with his father’s spectacles, burnt a hole in a piece of paper by focusing
a small image of the sun on it,
a) What defect of vision is his father suffering from?
b) Explain the correction of this defect with a ray diagram.

s dks feykdj cuk, x, la;kstu dh {kerk D;k gksxh?
12- +2.5D ,oa -1.5D {kerk ds nks ysal 2
What will be the power of the combination formed, by combining two lenses with power +2.5
D and -1.5D?
OR (vFkok)
i`Foh lrg ls ns[kus ij vkleku uhyk D;ksa fn[kkbZ nsrk gS\ varfj{k LVs”ku esa fdlh varfj{k ;k=h dks
vkleku dk jax dSlk fn[kkbZ nsxk \ dkj.k nhft,A
Why does the sky appear blue from the surface of earth? What will be the colour of the sky for
an astronaut in a space station? Give reason.

13- ,d Nk= us ij[kuyh esa FkksMh ek=k esa ysM ukbVªsV fy;k vkSj mls /khjs&/khjs xje fd;kA mlus ns[kk
ij[kuyh ls Hkwjs jax dk /kqvkW fudyk vkSj ij[kuyh esa ihys jax dk vo{ksi cpkA 1+1+1=3
d) bl vfHkfØ;k ds fy, larqfyr jklk;fud lehdj.k fyf[k,A
[k) gksus okyh jklk;fud vfHkfØ;k dk çdkj fyf[k,A
x) Hkwjs jax ds /kq,W rFkk ihys vo{ksi dks igpkusa fd og D;k gS\
A student took a small amount of lead nitrate in a test tube and heated it gently. He observed
the evolution of brown fumes and a yellow residue was left in the test tube.
a) Write the balanced chemical equation for this reaction.
b) Name the type of chemical reaction taking place.
c) Identify the brown fumes and yellow residue.

14- ykSg /kkrq dk ,d VqdM+k dqN fnuksa ds fy, [kqys esa NksM fn;k x;k ftl ij Hkwjs jax
a dh ijr cu
xbZA bl ?kVuk dh igpku djsa rFkk cuus okys inkFkZ dk jklk;fud lw= fy[ksAa bls jksdus dk mik;
crkb,A 3
A piece of iron was left in the open for some days. A brown layer was observed on it. Identify

the phenomenon; write the chemical formula of the new product. Explain how it can be
prevented.

5

15- fuEufyf[kr ds fy, bysDVªku fcUnq lajpuk fpf=r dhft,& 1+1+1=3
d) feFksu (CH4) [k) ,Fkhu (C2H4) x) ,Fkkbu (C2H2)
Draw the electron dot structure for-
a) Methane (CH4) b) Ethane (C2H4) c) Ethyne (C2H2)

16- ekuo ân; dh lajpuk dk ukekafdr fp= cukb, vkSj mleas vkDlhtu ;qDr vkSj vkDlhtu jfgr
jDr ds çokg dks rhjksa }kjk Li’V :i ls n”kkZb;s\ 3
Draw a neat and clean labeled diagram of the human heart showing the flow of oxygenated and
deoxygenated blood using arrows.
OR (vFkok)
ekuo vUr%lzkoh ra= dk LoPN fp= cukb;s rFkk fuEu ç”uksa ds mÙkj dsoy fp= esa n”kkZb;sA
d) ,d yM+dk cgqr yack gks x;k gSA dkSu lh xzafFk vf/kd lfØ; gS\
[k) ,d efgyk dk otu rsth ls c<+ jgk gS, mls Fkdku gks jgh gS rFkk mlds xys esa lwtu gSA dkSu
lh xzfa Fk çHkkfor gS\
x) Mj yxus ij ,d O;fDr dh /kM+du rst gks tkrh gSA dkSu lh xzfa Fk çHkkoh gS\
Draw a neat diagram of the human endocrine system and mark the answer only in the diagram.
a) A boy grows very tall, which gland is overactive?
b) A woman gains weight, feels tired and has swelling in her neck. Which gland is affected?
c) A man’s heart beat increases suddenly due to fear. Which gland is active?

17- d) tc ,d “kq) uLy ds yEcs eVj ds ikS/ks ds lkFk dks ,d “kq) uLy ds ckSus eVj ds ikS/ks dk
ladj.k djk;k x;k rks F1 ih<+h esa lHkh larfr yEcs eVj ds ikS/ks y{k.k okys tud ds leku FkhA
bldk D;k dkj.k gks ldrk gS\ O;k[;k djksA 2
[k) ,d Li’V vkjs[k dh lgk;rk ls F2 ih<h esa laHkkfor larfr dks n”kkZb;sA 1
a) When a pure bred tall pea plant is crossed with a pure bred dwarf plant, all the offspring’s
resembled one parent i.e., tall pea plant. What might be the reason for this? Explain.
b) With the help of a neat genetic diagram, show the possible offspring in F2 generation.

18- ,d ?kj esa 10 ,ybZMh cYc gSa] izR;sd 10W ds gSa vkSj izfrfnu 5 ?kaVk tyrs gSAa mlh ?kj esa 5
V~;cw ykbVsa gS]a izR;sd 40W dh gSa vkSj izfrfnu 4 ?kaVs tykbZ tkrh gSAa ;fn ?kj dh vkiwfrZ oksYVst 220
V gS] rks mRrj nhft,& 1+1+1=3
d½ izfrfnu [kir gksus okyh dqy ÅtkZ dh x.kuk fdyksokV&?kaVk (KWh) esa dhft,A
[k½ lHkh midj.kksa }kjk ,d lkFk pyus esa yh xbZ dqy /kkjk Kkr dhft,\
x½ 2 A jsVM s ¶;wt izHkkoh gksxk ;k ughaA dkj.k crkb,A
A house has 10 LED bulbs rated 10 W each, used 5 hours per day and 5 tube lights rated 40 W
each, used 4 hours per day. The supply voltage is 220V. Answer the following-
a) Calculate the total energy consumed per day in kilowatt-hours (KWh).

b) Find the total current drawn by all bulbs when all the appliances are operating together.
c) A fuse rated 2A will be effective or not. Give reason.

6

19- ;fn /kkjkokgh ifjukfydk esa izokfgr /kkjk dh fn”kk dks myV fn;k tk;s rks pqEcdh; {ks= ij D;k
izHkko iM+x
s k\ Li’V dhft,A bl fl)kUr dk ,d O;kogkfjd mi;ksx crkb,A 3
What will be the effect on the magnetic field if the current in a solenoid is reversed? Explain
clearly. Give one practical application of this principle.

20- d)- vtSo fuEudj.kh; inkFkZ Ik;kZoj.k dks tSo fuEudj.kh; inkFkksaZ dh rqyuk esa vf/kd gkfu D;ksa
igqWpkrs gSa\ vius mRrj ds i{k esa ,d mnkgj.k nhft,A 2
[k½&e`r vkSj lM+s xys inkFkksZa ls Hkkstu xzg.k djus okys thoksa dks D;k dgk tkrk gS\ 1
a) Why does non-biodegradable substances cause more harm to the environment than
biodegradable substances? Support your answer with an example.
b) What term is used for organisms that feed on dead and decaying matter?

21- 1+1+1+1=4

d)- bl vfHkfØ;k esa eqDr xSl dk uke fyf[k,A
[k)- bl vfHkfØ;k dk larqfyr jklk;fud lehsdj.k fyf[k,A
x)- D;k gksxk tc tyrh ekfpl dh rhyh dks ij[kuyh ds eqWg ij ys tk;sa\
s u ls Åij gS ;k uhps?
?k)- lfØ;rk Js.kh esa ftad dk LFkku gkbMªkt
a) Name the gas evolved in this reaction?
b) Write the balanced chemical equation for the reaction.
c) What happens to the glowing splint when brought near the mouth of the test tube?
d) Is zinc above or below hydrogen in the reactivity series?

22- fuEufyf[kr vfHkfØ;kvksa ds fy, larqfyr jklk;fud lehsdj.k fyf[k, rFkk vfHkfØ;k dk izdkj Hkh
crkb,A 1+1+1+1=4
d)- vEkksfu;e DyksjkbM ij Å’ek dk izHkkoA
[k)- dSfYl;e vkWDlkbM
DlkbM dh ty ls vfHkfØ;kA

x)- ftIle dks xeZ djus ijA
?k)- dkWij lYQsV foy;u esa yksgs dj dhy Mkyus ijA

7

Write the chemical equation for the following reaction and identify the type of reaction.
a) Action of heating on ammonium chloride.
b) Reaction of calcium oxide with water.
c) Heating of gypsum.
d) On putting an iron nail in a solution of copper sulphate.
OR (vFkok)
d)- ,Ydsu] ,Ydhu rFkk ,Ydkbu dk lkekU; lw= fyf[k,A
[k)- ,Ydsu Js.kh ds izFke lnL; dk lajpukRed lw= cukb,A
x)- ,Ydsu dks lar`Ir gkbMªksdkcZu D;ksa dgk tkrk gS\
?k)- ,Ydhu dks ,Ydsu esa dSls cnyk tk ldrk gS\
a) Write the general formula of alkanes, alkenes and alkynes.
b) Draw the structural formula of the first member of alkane’s series.
c) Why alkanes are called saturated hydrocarbons?
d) How can an alkene be converted to an alkane?

23- d)- “kkdkgkjh thoksa dh NksVh vkWr ekalkgkjh thoksa dh vis{kk vf/kd yEch gksrh gSA rdZ lfgr
le>kb,A 2
[k)- ,d MkWDVj us lksgu dh jDr dh TkkWp fjiksVZ ns[kus ds ckn mls vius vkgkj esa phuh de djus
vkSj fu;fer O;k;ke djus dks dgkA lksgu fdl chekjh ls ihfM+r gS\ ;g chekjh fdl gkeksZu
dh deh ls gksrh gS rFkk ml gkeksZu dks cukus okyh xzafFk dk uke fyf[k,A 2
a) Why do herbivores have a longer small intestine compared to carnivores? Explain with
reasoning.
b) A doctor has advised Sohan to reduce sugar intake in his diet and do regular exercise after
checking his blood test reports. Which disease do you think Sohan is suffering from? Name
the hormone responsible for this disease and the gland producing the hormone.

24- d)- iq’ih; ikS/kksa ds ySfxad iztuu esa “kkfey pj.kksa dks Li’V dhft,A vius mRrj ds leZFku esa ,d
mHk;fyaxh iq’i ds izeq[k tuu vaxksa dks n”kkZrk fp= cukb,A 2
[k)- chtksa ds fuekZ.k dh fØ;k esa ijkx.k rFkk fu’kspu ds egRo ij ppkZ dhft,A 2
a) Elucidated the steps involved in the sexual reproduction of flowering plants. Support your
answer with a well labeled diagram of a bisexual flower showing key reproductive organs.
b) Discuss the significance of pollination and fertilization in the formation of a seed.
OR (vFkok)
d)- vehck rFkk gkbMªk esa tuu fdl fof/k ls gksrk gS\ bu nksuksa tuu fof/k;ksa dh rqyuk dhft,A
[k)- euq’; esa Hkkstu dhs ikpu izfØ;k esa fuEufyf[kr ,Utkbeksa dh Hkwfedk Li’V dhft,&
i) isfIlu ii) ykbist iii) fVªfIlu iv) ,ekbyst (ykj)
a) Name the process by which Amoeba and Hydra reproduce. Distinguish between these modes

of reproduction.
b) Explain the role of the following enzymes in the process of digestion of food in humans-
i) Pepsin ii) Lipase iii) Trypsin iv) Salivary amylase

8

25- fn;s x, ifjiFk dk v/;;u dj Kkr djsa& 1+1+2=4

d)- ifjiFk dk dqy izfrjks/kA
[k)- 12 Ω ds izfrjks/k esa izokfgr /kkjkA
x)- D;k vehVj A1 rFkk vehVj A2 ds ekku esa dksbZ vUrj gksxk\ ;fn gksxk rks D;k\
Study the circuit and find out –
a) Total resistance of the circuit.
b) Current flowing through 12 Ω resistor.
c) Is there any difference in the readings of ammeter A1 and A2 ?If any than what is it?
OR (vFkok)
d)- pqEcdh; {ks= js[kk,Wa D;k gSa\ fuEufyf[kr dFkuksa dh iqf’V dhft,& 1+1=2
i) pqEcdh; {ks= js[kk,Wa dHkh ,d nwljs dks izfrONsfnr ugha djrh gSaA
ii) pqEcdh; {ks= js[kk,Wa cUn oØkdkj gksrh gaSA
[k)- pkj ;qfDr;ksa ds uke fyf[k, tgkW fo|qr /kkjkokgh pkyd rFkk mlds lkFk pqEcdh; {ks=ksa dk mi;ksx
gksrk gSA 2
a) What are magnetic field lines? Justify the following statements –
i) Two magnetic field lines never intersect each other.
ii) Magnetic field lines are closed curves.
b) Name four devices where current carrying conductors and magnetic fields are used along with
them.

26- fuEufyf[kr fLFkfr;ksa esa iz;qDr midj.k (niZ.k@ysal) dk uke crkb, vkSj izR;sd fLFkfr esa izfrfcEc
fuekZ.k n”kkZus ds fy, fdj.k vkjs[k cukb,A
d)- oLrq dks midj.k (niZ.k@ysal) vkSj mlds Qksdl ds chp j[kk tkrk gS rks oLrq ls cM+k
izfrfcEc midj.k ds ihNs curk gSA 2
[k)- oLrq dks Qksdl rFkk midj.k (niZ.k@ysal) ds chp j[kk tkrk gS rks cM+k izfrfcEc mlh vksj

curk gS ftl vksj oLrq j[kh gSA 2

9

Name the device (type of lens/ mirror) used in the following cases and draw ray diagrams to
show the image formation in each case-
a) Object is placed between the device (lens/mirror) and its focus, the enlarged image is
formed behind the device.
b) Object is placed between the focus and device, enlarged image formed on the same side as
that of an object.
OR (vFkok)
5-0 lseh vkdkj dh oLrq 16 lseh Qksdl nwjh okys vory niZ.k ds lkeus 24 lseh nwjh ij j[kh xbZ gSA
,d Li’V izfrfcEc izkIr djus ds fy, niZ.k ls fdruh nwjh ij inkZ j[kk tkuk pkfg,\ bl izfrfcEc dk
vkdkj rFkk izd`fr Hkh crkb,A 4
An object of 5.0 cm in size is placed 24 cm in front of a concave mirror of focal length 16 cm. At
what distance from mirror should a screen be placed in order to obtain a sharp image?Also find size
and nature of the image.

27- d{kk es foKku f”k{kd us xeys esa yxs ikS/ks ds lkFk ,d iz;ksx fd;kA

,d iRrh dss Hkkx A dks lksMk ykbe lss Hkjs tkj esa cUn fd;k x;k vkSj mlds Hkkx B dks [kqyh
gok esa NksM+ fn;k x;kA xeys dks dqN ?kaVks ds fy, rst /kwi esa j[kk x;kA blds ckn f”k{kd us iRrh ds
nksuksa Hkkxksa ij vkk;ksMhu ijh{k.k fd;kA Hkkx B uhyk&dkyk gks x;k] ijUrq Hkkx A uhyk&dkyk ugha gqvkA

d) izdk”k la”ys’k.k ds fy, vko”;d fdl ?kVd dks lksMk ykbe }kjk vo”kksf’kr fd;k x;k\ 1
[k) vk;ksMhu ijh{k.k ds ckn Hkkx B uhyk dkyk D;ksa gqvk\ 1
x) bl xSl dh izdk”k la”ys’k.k dh fØ;k esa D;k Hkwfedk gS\ 2

10

A science teacher conducted an experiment with potted plant.
Part A of an leaf was enclosed in a jar containing soda lime and part B of same leaf was left
in the open air. The pot was exposed in bright sunlight for several hours. Afterwards, the teacher
applied the iodine test to both parts of that leaf. Part B turned blue–black, but part A did not.

a) Which gas required during photosynthesis is absorbed by soda lime?
b) Why did part B turn blue- black after the iodine test?
c) What is the role of this gas in the process of photosynthesis?

*****

11

jksy ua& ------------------------------------- eqfnzr i`"Bksa dh la[;k :9

2026
izfrn”kZ iz”u&i=
SAMPLE QUESTION PAPER
foKku SCIENCE (033)
Lke; % 3 ?kaVk iw.kkZad % 80
Time : 3 Hours Max Marks : 80

funsZ”k (Directions) :
i) bl iz”u i= esa dqy 27 iz”u gSaA lHkh iz”u vfuok;Z gSAa
There are 27 questions in this paper. All questions are Compulsory.
ii) iz”uksa gsrq fu/kkZfjr vad muds lEeq[k vafdr gSaA
Marks allotted to the question are mentioned against them.
iii) izR;sd iz”u dks /;kuiwoZd if<+;s rFkk leqfpr mRrj nhft,A
Read each question carefully and answer to the point.
iv) iz”u la[;k 1 cgqfodYih; iz”u gSA bl iz”u ds izR;sd [kaM ds mRrj esa pkj fodYi fn;s
x, gSaA lgh fodYi viuh mRrjiqfLrdk esa fyf[k,A
Question No.1 is multiple choice question. Four options are given in answer of each
part of the question. Write correct option in your answer book.
v) iz”u la[;k 2 [email protected] ls lacfU/kr iz”u gS ftlesa izR;sd [kaM ds fy, pkj fodYi fn;s
x, gSaA lgh fodYi viuh mRrjiqfLrdk esa fyf[k,A
Question No. 2 is related to Assertion/Reason type question.Four options are given in
answer of each part of the question. Write correct option in your answer book.
vi) iz”u la[;k 1 o iz”u la- 2 dk izR;sd [kaM ,d (1) vad dk gSA iz”u la[;k 3 ls 6 rd ,d
(1) vad ds iz”u gaSA iz”u la[;k 7 ls 12 rd nks (2) vad ds iz”u gaSA iz”u la[;k 13 ls 20
rd rhu (3) vad ds iz”u gaSA iz”u la[;k 21 ls 26 rd pkj (4) vad ds iz”u gaAS iz”u la[;k
27 dsl LVMh ls lacfU/kr iz”u pkj vad (1+1+2) dk gSA
Each part of question No. 1 and question no.2 carries one (1) mark. Question no. 3 to 6
is of one (1) mark each. Question No.7 to 12 is of two (2) marks each. Question no.13
to 20 are of three marks (3) each. Question No. 21 to 26 are of four marks (4) each.
Question no. 27 related to case study question carries 4 marks (1+1+2).
vii) bl iz”u i= esa lexz ij dksbZ fodYi ughsa gS rFkkfi dfri; iz”uksa esa vkarfjd fodYi
iznku fd;k x;k gSA ,sls iz”uksa esa dsoy ,d fodYi dk gh mRrj nhft,A
There is no overall choice in this question paper, however an internal choice has been
provided in few questions. Attempt only one of the given choices in such questions.

1

1- cgqfodYih; ç'u (MCQs) 1x10 =10

d& fuEufyf[kr esa ls dkSu lk ,d Å"ek{ksih çfØ;k dk mnkgj.k gS&
a a) ikuh dk VwVuk b) ykbeLVksu dk fDodykbe esa ifjorZu
c½ 'olu çfØ;k d½ çdk'k la'ys".k vfHkfØ;k
One of the following is an exothermic reaction this is
a) Electrolysis of water b) Conversion of limestone into quick lime
c) Process of respiration d) Process of photosynthesis

[k& Qsjl lYQsV ds Å"eh; fo;kstu ls Qsfjd v‚DlkbM curk gS rks Qsjl lYQsV dk jax gksxk&
a) uhyk b½ gjk
c½ Hkwjk d½ ihyk
Decomposition of ferrous sulphate is heated strongly and formed ferric oxide so color of
ferrous sulphate is.
a) Blue b) Green
c) Brown d) Yellow

x& tyh; fofy;u ,d fn, x, yo.k esa ls tks yky fyVel dks uhyk dj nsrk gS&
a) K2SO4 b) Na2CO3
c) (NH4)2 SO4 d) CH3COONa
The aqueous solution of one of the following salts will turn red litmus to blue, this salt is.
a) K2SO4 b) Na2CO3
c) (NH4)2 SO4 d) CH3COONa

?k& fn, x, x, fp= esa ls mu dksf'kdkvksa dks igpkfu, ftues çdk'k la'ys".k ds fy, vR;f/kd ek=k
esa xSlksa dk vknku&çnku gksrk gS&

a) I b) IV
c) III d) II
In the following diagram, identify the cells through which massive amount of gaseous

exchange takes place for photosynthesis:
a) I b) IV
c) III d) II

2

³& vehck esa lk/kkj.k folj.k dh çfØ;k fdl Hkkx esa gksrh gS?
a½ dsUæd esa b½ [kk|~ fjfädk esa
c½ dksf'kdk f>Yyh esa d½ dksf'kdk æO; esa
In Amoeba, in which part of body simple diffusion take place-
a) In Nucleus b) In Food vacuole
c) In Cell membrane d) In Cytoplasm

p& ml fo|qr~ xq.k dk uke crkb, ftldk fpUg vksex
s k ¼Ω½ gS&
a) çfrjks/kdrk b½ foHkokUrj
c½ fo|qr /kkjk d½ çfrjks/k
Name the electrical property of a materials whose symbol is (Omega Ω)
a) Resistivity b) Potential difference
c) Electric current d) Resistance

N& pkj inkFkksZ P] Q] R vkSj S ds viorZukad Øe'k% 1-77] 1-50] 1-31 vkSj 1-36 gSA çdk'k dh pky
lcls vf/kd fdlesa gksxh&
a) P b) Q
c) R d) S
The Refractive indices of four substance P, Q, R and S are 1.77, 1.50, 1.31, and 1.36,
respectively. In which substance the speed of light will be maximum-
a) P b) Q
c) R d) S

t& vEyh; o"kkZ dk pH eku 5-6 ls de gksrk gSA bueas ls dkSu lh xSl vEyh; o"kkZ ds fy, ftEesnkj
ugha gS&
a) SO3 b) SO2
c) CO d) NO2
The pH of Acid rain is less than 5.6 in the given gases which one is not responsible for Acid
rain-
a) SO3 b) SO2
c) CO d) NO2

>& ,yihth fdpu LVkso esa tyrh gS] blds fy, dkSu lk dFku lgh ugha gS&
a½ ,yihth dk mPp dSyksfjd ekuA
b½ ,yihth ,d LoPN vkSj lkQ ?kjsyw bZa/ku gSA
c½ ,yihth tyus ij fo"kkä xSl fudkyrh gSA
d½ ,yihth dh eq[; xSl C;wVus gSA

LPG burn in a kitchen stove which of the statement is not correct-
a) LPG has a high caloric value.
b) LPG is very neat and clean domestic fuel.
c) LPG produce poisonous gas on burning.
d) Butane Gas is main part of LPG.
3

¥& ,dkad le; esa çokfgr gksus okyk vkos'k dk ek=d gS&
aa½ dwyke b½oksYV
c½ okV d½ ,fEi;j
The unit for the flow of charge per unit time is.
a) Coulomb b) Volt
c) Watt d) Ampere

2- fuEufyf[kr iz”u [k.Mksa esa nks dFku fn;s x;s gSa ftues ,d dks vfHkdFku ¼Assertion-A½ rFkk nwljs
dks dkj.k ¼Reason-R½ }kjk vafdr fd;k x;k gSA uhps fn, x, pkj fodYiksa esa ls fuEufyf[kr
ç'u [k.Mksa ds lgh mÙkj dk p;u dhft;s&
There are two statements given below, one as Assertion (A) and the other labeled as Reason
(R). Select the correct answer to these questions from the given four options below.
v& vfHkdFku ¼A½ % ftad v‚DlkbM ,d mHk;/kehZ v‚DlkbM gSA 1
dkj.k ¼R½ % /kkrq ds og v‚DlkbM tks u rks vEyksa ds lkFk u gh {kkj ds lkFk vfHkfØ;k djrs
gSa mnklhu v‚DlkbM dgykrs gaSA
a½ dFku A vkSj R nksuksa lgh gSaA R, A dh lgh O;k[;k djrk gSA
b½ dFku A vkSj R nksuksa lgh gS ijUrq R, A dh lgh O;k[;k ugha djrk gSA
c) dFku A lgh gS ijUrq dkj.k R xyr gSA
d½ dFku A xyr gS ijUrq dkj.k R lgh gSA
Assertion (A): Zinc oxide is an amphoteric oxide.
Reason (R) : Metal oxide which do not reacts with acid and bases are called as neutral
oxide.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.

c& vfHkdFku ¼A½ % gekjh fy[kus vFkok ckrphr djus dh fØ;kvksa esa gekjk raf=dk ra= isf'k;ksa
rd lUns'k Hkstrk gSA 1
dkj.k ¼R½ % ifj/kh; raf=dk ra= diky raf=dkvksa vkSj es# rfU=dkvksa ls cuk gksrk gSA
a½ dFku A vkSj R nksuksa lgh gSaA R, A dh lgh O;k[;k djrk gSA
b½ dFku A vkSj R nksuksa lgh gS ijUrq R, A dh lgh O;k[;k ugha djrk gSA
c) dFku A lgh gS ijUrq dkj.k R xyr gSA
d½ dFku A xyr gS ijUrq dkj.k R lgh gSA
Assertion (A) : In our actions of writing or talking, our nervous system communicates
with the muscles.
Reason (R) : Cranial nerves and spinal nerves forms the Peripheral Nervous System.

a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is the not the correct explanation of A.
c) Assertion (A) is true, but Reason (R) is false.
d) Assertion (A) is false , but Reason (R) is true.
4

3- ekuo jä dk 'olu o.kZd dk uke fyf[k;s tks QsQM+ksa ls v‚Dlhtu dks iwjs 'kjhj esa igqpkrk gSA1
Name the respiratory pigment in human blood which carries the oxygen from the lungs to
whole of the body.

4- mÙky ysal ds }kjk cuk çfrfcEc tc Qksdl vkSj ysal ds chp gks rks çfrfcEc dh ç—fr D;k
gksxh\ 1
When Image formed by concave lens placed between focus and lens what will the nature of
image?

5- ml dkcZfud ;kSfxd dk fØ;kRed lewg dk uke tks lksfM;e ckbZdkcksZuVs ds lkFk fØ;k dj ds
rhoz cqn~cqnkgV nsrk gS\ 1
Name the functional group present in an organic compound which give effervescence with
Sodium bicarbonate.?

6- ikni gkeksZu dk uke fyf[k, tks ifÙk;ksa ds fxjus ds fy, ftEesnkj gksrk gS\ 1
Name the plant hormone which is responsible for the falling of leaves?

7- D;k gksrk gS tc dksbZ vEy /kkfRod v‚DlkbM ds lkFk fØ;k djrk gS mls mnkgj.k lfgr
le>kb;s vkSj larqfyr jklk;fud lehdj.k Hkh fyf[k;s\ 2
What happen when an acid reacts with a metal oxide. Explain with the help of an example
and also write balanced chemical equation for the reaction involved?

8- if{k;ksa vkSj Lruik;h thoksasa esa v‚Dlhtfur vkSj fov‚Dlhtfur #f/kj dks feyus ls jksdk tkuk D;ksa
egRoiw.kZ gS\ 2
Why is it important to prevent oxygenated and deoxygenated blood from mixing in the birds
and mammals?

9- tc fdlh 20Ω çfrjks/k okys rkj dks [khapk tkrk gS rks mldh yEckbZ nksxquh gks tkrh gS] rks bl
rkj dk u;k çfrjks/k D;k gksxk\ 2
A piece of wire of 20 Ω resistance is drawn out so that its length is increased to twice its
original length. Calculate the resistance of the wire in the new situation.?

10- ,d cqtqxZ O;fä vk¡[k ls FkksMk nwj v[kckj idM+rk gS idM+us ij mlds vk¡[k dh lajpuk vyx
fn[krh gSA la{ksi esa fyf[k, fd og ifjorZu djus dh dksf'k'k D;ksa dj jgk gS\ 2
An elderly person holds a newspaper slightly away from the eye, the structure of the eye is
different when held. Briefly explain why he is trying to make this change?

11- u;s czk;ksfQye ds ikS/ks fdl çdkj iqjkus ikS/kksa dh ifÙk;ksa ls curs gS\ vius mÙkj dks fp= ls
le>kb;s\ 2

Explain how new Bryophyllum plants can be produced from leaves of the old plant and
answer it with the help of diagram.
vFkok/OR

5

vehck }kjk n'kkZ, tkus okys iks"k.k ds çdkj dk uke fyf[k;sA O;k[;k dhft;s fd ;g tho viuk
Hkkstu fdl çdkj xzg.k djrk gS\ 2
Name the type of nutrition exhibited by Amoeba. Explain how food is taken in and digested
by this organism?

12- IykLVj v‚Q isfjl dks ueh jfgr crZu esa gh D;ksa j[kuk pkfg,\ blls lEcaf/kr jklk;fud
lehdj.k Hkh fyf[k;s\ 2
Why POP (Plaster of Paris) should be stored in a moisture proof container? Give a chemical
reaction?

13- vkstksu ijr dh {kfr fpark dk fo"k; D;ksa gS\ bl {kfr dks lhfer djus ds fy, D;k dne mBk;s
x, gS\a 3
Why is damage to the ozone layer a cause for concern? What steps has been taken to limit
this damage?
vFkok/OR
O;k[;k dhft;s fd fdl çdkj vkgkj J`a[kyk }kjk gkfudkjd jlk;u gekjs 'kjhj esa ços'k djrs
gSa\ ekuo 'kjhj esa bu gkfudj jlk;uksa dh lkaærk vf/kdre D;ksa gksrh gS\ 3
Explain how some harmful chemicals enter our bodies through the food chain? Why is
concentration of these harmful chemicals found to be maximum in human beings?

14- ,d ?kaVs esa 50v foHkokUrj ls 72000 dwyke vkos'k dks LFkkukrfjr djus esa mRiUu m"ek ds eku
dh x.kuk dhft;s\ 3
Calculate the heat produced when 72000 coulombs of charge are transferred in one hour
through a potential difference of 50 volts?

15- ,d inkFkZ X ftldk mi;ksx çfrvEy ds :i esa fd;k tkrk gS ruq gkbMªksDyksfjd vEy ds lkFk
vfHkfØ;k dj ds xSl Y mRiUu djrk gS ftldk mi;ksx ,d çdkj ds vfXu'kked ;U= ds :i esa
fd;k tkrk gS inkFkZ X vkSj Y dk uke crkb;s vkSj gksus okyh jklk;fud vfHkfØ;k ds fy,
larqfyr lehdj.k Hkh fyf[k;s\ 3
A substance X which is used as an antacid reacts with dil HCl to produce a gas Y which is
used in one type of fire extinguisher. Name the substance X and Y. Write a balanced
equation for the chemical reaction which take place.

16- ysal ls 50 cm nwjh ij j[kh ,d oLrq ysal ds lkeus 10 cm dh nwjh ij vkHkklh çfrfoEc cukrh
gS] rks ysal dh Qksdl nwjh D;k gksxh\ vkSj çfrfoEc dk cuuk n'kkZus ds fy, vkjs[k Hkh [khafp;s\ 3
An object placed 50 cm from a lens that produce a virtual image at a distance of 10 cm in
front of the lens. Also draw a ray diagram to show the formation of image and also calculate
focal length of lens.

17- mi;qä jklk;fud lehdj.k dh lgk;rk ls fuLrkiu vkSj HktZu ds chp eq[; 2 varj fyf[k;s\
v;Ld ds fuLrkiu vkSj HktZu ds i'pkr çkIr mRikn ls /kkrq dk vip;u fdl çdkj fd;k tkrk
gS\ blls gksus okyh vfHkfØ;k dk lehdj.k Hkh fyf[k;s\ 3
6

With the help of suitable chemical equation write two main differences between calcination
and roasting. How are metals reduced from the product obtained after calcinations and
roasting of the ore? Write chemical equation for the reaction?

18- ekuo esa ew= fuekZ.k dh çfØ;k esa eq[; pj.kksa dks le>kb;s vkSj usÝksu ¼o`Ddk.kq½ dk ukekafdr
fp= Hkh cukb;sA 3
Describe the mechanism of urine formation in human with main steps and draw the labelled
structure of Nephron.

19- fuEufyf[kr iz”uksa ds mRrj nhft,& 1.5X2=3
a) 'olu 'kjhj dk ,d egRoiw.kZ dk;Z gSA bl dFku dh iqf"V dhft;sA
b½ ok;oh; 'olu vkSj vok;oh; 'olu esa D;k varj gS\ çR;sd dk mnkgj.k fyf[k;sA
a) ‘Respiration is a vital function of the body’. Justify the statement.
b) What is the difference between aerobic respiration and anaerobic respiration. Give
example of each.

20- ikS/kksa esa fu"kspu dh çfØ;k dc gksrh gS\ bldh D;k fØ;kfof/k gS\ ;g ijkx.k ls fdl çdkj fHkUu
gS\ 3
When does the process of fertilization in plants takes place? What is the mechanism of it?
How it is different with pollination?

21- fuEukafdr dh bysDVªku fcanq lajpuk cukb;s- 1X4=4
d½ ,FksuksbZd vEy [k½ çksius ksu
x½ H2S ?k) F2
Draw the electron dot structure for-
a) Ethanoic acid b) Propanone
c) H2S d) F2

22- esaMy ds eVj ds cht ij oa'kkuqxr ds fu;e D;k gaS\ ,dladj vkSj f}ladj ladj.k esa varj Li’V
dhft;s\ 4
What are the Mendal’s rules for the inheritance in the pea seeds? Differentiate between
monohybrid and dihybrid hybridization.

23- ysal dh {kerk dk O;qRØe D;k dgykrk gS\ fdlh ysl a dh Qksdl nwjh &10 cm gSA bl ysl a dh
ç—fr vkSj bldh {kerk D;k gksxhA ;fn fdlh fcEc dks bl ysal ds çdkf'kd dsaæ ls 20 cm dh
nwjh ij j[k fn;k tk;] rks u;h dkrhZ; fpUg ikfjikVh ds vuqlkj vko/kZu dk fpUg D;k gksxk\ 4
What is reciprocal of power of lens called. The focal length of a lens is -10 cm. What will be
the nature of lens and its power? If an object is placed at a distance of 20 cm from the

optical centre of this lens, according to the New Cartesian Sign Convention, what will be the
sign of magnification in this case?

7

24- dksbZ efgyk fdlh pêkuh ioZr ij p<+rs le; Hk;Hkhr gks tkrh gS vkSj mls Mj yxrk gSA mldk
'kjhj ,slh rukoiw.kZ vkSj Hk;kud ifjfLFkr;ksa esa yM+rs jgus vFkok ykSVus ds fy, rS;kjh djus
yxrk gSA
mijksä rF; ds vk/kkj ij uhps fn, ç'uksa ds mÙkj nhft;s& 1+1+2=4
d½ bl fLFkfr esa efgyk ds #f/kj esa Jkfor gkeksZu dk uke fyf[k;sA
[k½ bl fLFkfr esa Jkfor gkeksZu dh lzkrs xzfa Fk dk uke fyf[k;sA
x½ bl gkeksZu ds Jko ds ifj.kkeLo:i efgyk ds 'kjhj esa gksus okyh dksbZ nks vuqfØ;k;sa fyf[k;sA
A woman while climbing up a rocky hill comes into a panic state and fear. Her body starts
reacting in a fight or flight condition to adjusted to the dangerous and stressful situation.
Answer the following questions based on the above facts-
a) Name the hormone secreted in the blood of the women in this situation.
b) Name the source gland of the hormone secreted in this condition.
c)- State any two responses in the body of the women as a result of the secretion of these
hormones.
vFkok/OR
fdlh rkykc ftldk laxzghr ikuh xgjk gjk fn[kkbZ ns jgk gS mleas dksbZ Nk=k rarq ds lkeku
lajpukvksa dks igpkurh gSA bu lajpukvksa dk uke fyf[k;sA ;s tho fdl çdkj xq.ku djrs gSa\ bldh
rqyuk ySafxd tuu fof/k ls dhft;sA 4
Name the filamentous structures a student could identify when she collected water from a pond
that appeared dark green. How do these organisms multiply? Compare it with sexual mode of
reproduction.

25- D;k gksrk gS tc ¼dsoy jklk;fud lehdj.k fyf[k;s½& 1X4=4
a½ ftad v‚DlkbM dh lksfM;e gkbMªkv s ‚DlkbM ds lkFk fØ;k
b½ yky rIr yksgs dh Hkki ds lkFk fØ;k
c½ lksfM;e ckbZ dkcksZuVs dh bFksuksbd vEy ds lkFk fØ;k
d½ ftIle dks 373k ij xeZ fd;k tkrk gS
What happens when (write only chemical equation)
a) Zinc oxide reacts with sodium hydroxide.
b) Steam is passed over red-hot iron
c) Ethanoic acid reacts with sodium bicarbonate
d) Gypsum is heated up to 373k

26- fn, x, ifjiFk esa x.kuk dhft;s& 4

8

a½- ifjiFk esa dqy çfrjks/k dk eku Kkr dhft,A
b½- ifjiFk esa dqy fo/kqr /kkjk dk eku Kkr dhft,A
In the given circuit diagram calculate-
a- Calculate total resistance of circuit.
b- Calculate total electric current in the circuit.

27- CASE STUDY
feLVj rksej dk lksfM;e dk ;kSfxd X tks idkSM+k dks dqjdqjk cukrk gSA ;g ,d {kkjh; yo.k
tks ,aVkflM ds :i esa mi;ksx fd;k tkrk gSA bls cukus ds fy, lksfM;e DyksjkbM dk ç;ksx
dPps inkFkZ ds :i esa fd;k tkrk gSA
Mr. Tomar use a compound of sodium X to make Pakoras crispy. It is corrosive basic salt
also use as an ingredient in antacid. It is produced using sodium chloride as one of the raw
materials.
mijksDr ds vk/kkj ij fuEufyf[kr ç'uksa ds mÙkj nhft;s&
(Give answer of the following questions)&
a½ lksfM;e ds ;kSfxd X dh igpku dj mldk jklk;fud uke fyf[k;s\ 1
b½ X dks cukus esa gksus okyh vfHkfØ;k dk jklk;fud lehdj.k fyf[k;s\ 1
c½ X dks xeZ djus ij fudyh gqbZ xSl dk ijh{k.k dSls djsax\s 2
a)Write chemical name by identify the compound of sodium X.
b)Write a chemical equation for preparation X.
c)How would you test the presence of gas which is evolved on heating X.

*****

9

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