Science - THEORY - 10

MODEL QUESTION PAPER
SCIENCE (THEORY)
CLASS – X
MODEL QUESTION PAPER
CLASS - X
SCIENCE ( Theory )
dqy iz’uksa dh la[;k % 18 + 9 = 27 i`"Bksa dh dqy la[;k % 6

Total No. of Questions : 18 + 9 = 27 Total No. of Pages : 6
Lke; % 2½ ?kaVs iw.kkZad % 60

Time : 2 ½ Hours Full Marks : 60
lkekU; funsZ’k %
GENERAL INSTRUCTIONS :
1. ijh{kkFkhZ ;FkklaHko vius 'kCnksa esa gh mÙkj nsaA

Candidates are required to give their answers in their own words as far as practicable.
2 bl iz’ui= esa nks xzqi ‘A’ ,oa ‘B’ gSa ,oa nksuksa xzqiksa ds lHkh iz’uksa dk mÙkj nsuk vfuok;Z gSA
i) xzqi A ¼HkkSfrdh ,oa jlk;u½ & 40 vad
ii) xzqi B ¼tho foKku½ & 20 vad
The question paper has two Groups 'A' and 'B' and it is compulsory to answer all the questions of both
the Groups.
i) Group 'A' ( Physics and Chemistry) - 40 Marks
ii) Group 'B' ( Biology ) - 20 Marks
3. izR;sd iz’u ds fy;s fu/kkZfjr vad mlds lkeus vafdr gSaA

Marks allotted to each question are printed against it.
4. iz’uksa ds mÙkj fn;s x;s funsZ’k ds vkyksd esa gh fy[ksaA

Write the answers of questions in the context of instructions given.
5. lHkh jQ dk;Z iz’u&lg&mÙkj iqfLrdk ds var esa fn, x, i`"Bksa ij gh dhft,] vU;= dgha
ughaA
Do all rough work on the last page of the Question-cum-Answer Booklet and nowhere else.
6. dqN iz’uksa esa oSdfYid vUr%p;u fn;s x;s gSaA ,sls iz’uksa esa vkidks fn;s x;s p;u esa ls dsoy
,d iz’u gh djuk gSA
Internal options have been given for some questions. You are to attempt only one option in such
questions.
7. xzqi A ds iz’u la[;k 1 ls 6 rd vkSj xzqi B ds iz’u la[;k 19 ls 21 ^vfr y?kq mÙkjh;* izdkj
ds iz’u gSaA bu iz’uksa esa ls ÁR;sd ds mÙkj ,d 'kCn esa vFkok ,d okD; esa nsus gSaA
Question Nos. 1 to 6 of Group A and Question Nos. 19 to 21 of Group B are 'Very short answer' type
questions. Answer each one of these questions in one word or in one sentence.
8. xzqi A ds iz’u la[;k 7 ls 12 rd vkSj xzqi B ds iz’u la[;k 22 ls 24 rd ^y?kq mÙkjh; & II*
izdkj ds iz’u gSaA bu iz’uksa esa ls ÁR;sd ds mÙkj yxHkx 30 ls 40 'kCnksa esa nsus gSaA
Question Nos. 7 to 12 of Group A and Question Nos. 22 to 24 of Group B are 'Short Answer-11' type
questions. Answer each one of these questions in about 30 to 40 words.
9. xzqi A ds iz’u la[;k 13 ls 16 rd vkSj xzqi B ds iz’u la[;k 25 ,oa 26 rd ^^y?kqmÙkjh;&I”

Ádkj ds iz’u gSaA bu iz’uksa esa ls ÁR;sd ds mÙkj yxHkx 40 ls 50 'kCnksa esa nsus gSaA
Question Nos. 13 to 16 of Group A and Question Nos. 25 and 26 of Group B are 'Short Answer-I' type
questions. Answer each one of these question in about 40 to 50 words.
10. xzqi A ds iz’u la[;k 17 ,oa 18 vkSj xzqi B ds iz’u la[;k 27 ^nh?kZ mÙkjh;* izdkj ds iz’u gSaA
bu iz’uksa esa ls ÁR;sd ds mÙkj yxHkx 70 'kCnksa esa nsus gSaA
Question Nos. 17 & 18 of Group A and Question No. 27 of Group B are 'Long Answer' type questions.
Answer each one of these questions in 70 words.
11. tgk¡ dgha Hkh fp= vko’;d gksa] mUgsa LoPNrk ds lkFk Li"V #i ls [khafp,A
Draw neat and clean diagrams wherever necessary.
Xkzqi A ¼HkkSfrdh ,oa jlk;u½

Group A (Physics & Chemistry)
1. ysal dh {kerk dk SI ek=d D;k gS \ 1

What is the SI unit of power of a lens ?
2. Lkk/kkj.k ued dk jklk;fud lw= fyf[k,A 1
Write the chemical formula of common salt.
3. foHkokUrj dks fdl ;U= }kjk ekik tkrk gS \ 1
By which instrument potential difference is measured ?
4. rkWEck ,oa tLrk dh feJ /kkrq dks D;k dgrsa gS \ 1
What is the alloy of Copper and Zinc called ?
5. fo|qr ifjiFkksa ds y?kqiFku vFkok vfrHkkj.k ds dkj.k gksus okyh gkfu ls lqj{kk dh 1
lcls egRoiw.kZ ;qfDr D;k gS \

Which is the most important device to protect electric circuits from the harm caused
by short circuit and overloading ?
6. HCHO essa mifLFkr izdk;kZRed lewg dks fyf[k,A 1
Write the functional group present in HCHO.
7. 32 lseh oØrk f=T;k okys mÙky niZ.k dh Qksdl nwjh fudkfy,A 2
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
8. dkWij ds yky Hkwjs&pw.kZ dks fp=kuqlkj xje fd;k x;kA fp= ds ¼1½ vkSj ¼2½ dks 1+1 = 2
ukekafdr dhft,A
Red-brown powder of copper is heated as shown in the figure. Labell (1) and (2) of
the figure.
9. fdlh fcac dks oØrk dsUnz C ds ihNs fdlh vory niZ.k ds lEeq[k j[kk x;kA curs 2
gq, izfrfcEc dk fdj.k vkjs[k [khafp,A

An object is placed in front of a concave mirror beyond the centre of curvature C.
Draw the ray diagram of the image so formed.
10. pH Ldsy D;k gS \ mnklhu foy;u dk pH eku fyf[k, A 1+1 = 2
What is pH scale ? Write pH value of a neutral solution.
11. ,sls nks ÅtkZ L=ksrksa ds uke fyf[k, ftUgsa ge lekI; ekurs gSaA vius p;u ds fy, 2
rdZ nhft,A
Give names of two energy sources that you would consider to be exhaustible. Give
reasons for your choices.
12. ,d rRo X vkorZ lkj.kh ds izFke lewg ,oa rhljs vkorZ esa gS % 1+1 = 2
¼a½ X D;k gS & /kkrq ;k v/kkrq \

¼b½ bldh la;kstdrk D;k gS \
An element X is in group 1 and third period of the periodic table :
(a) What is X - metal or non–metal?
(b) What is its valency ?
13. LoPN vkdk'k dk jax uhyk D;ksa gksrk gS \ 3
Why is the colour of the clear sky blue ?
14. fuEu lehdj.kksa dks larqfyr dhft, % 1+1+1 = 3
Balance the following equations :

i) N2 + H2 NH3
ii) Fe + H2O Fe3O4 + H2
iii) Cu + O2 CuO
15. ?kjsyw ifjiFk esa iz;qDr gksus okys rhu izdkj ds rkjksa ds uke ,oa jax fyf[k,A 1+1+1 = 3
Write name and colours of three wires used in domestic wiring.

16. fuEu ;kSfxdksa ds lajpukRed lw= cukb, % 1+1+1 = 3
i) czkseksizksisu
ii) izksisukWy
iii) izksihu
Draw the structural formulae for the following compounds :
i) Bromopropane
ii) Propanol
iii) Propene
17. ¼a½ 2 Ω] 3 Ω] rFkk 6 Ω ds rhu izfrjks/kdksa dks fdl izdkj la;ksftr djsaxs fd 1½ +1½
la;kstu dk dqy izfrjks/k ¼i½ 4 Ω ¼ii½ 1 Ω gks \ =3
How can three resistors of resistances 2 Ω] 3 Ω] and 6 Ω be connected to give a
total resistance of ¼i½ 4 Ω ¼ii½ 1 Ω \
¼b½ izfrjks/k fdls dgrs gSa \ bldk SI ek=d fyf[k,A

What is resistance ? Write its SI unit.
1+1=2
vFkok ¼Or½
fo|qr tfu= D;k gS \ bldk fl)kUr fyf[k,A izR;korhZ /kkjk (A.C.) tfu= dk
ukekafdr fp= vafdr dhft,A 1+1+3= 5
What is electrical generator ? Write its principle. Draw a labelled diagram of A.C.
generator.
18. fn;s x;s fp= esa yo.k ds foy;u dh pkydrk dk iz;ksx fn[kk;k x;k gSA 1+1+1+1+1=5
¼1½] ¼2½] ¼3½] ¼4½ rFkk ¼5½ dk ukekadu dhft;s %
vFkok
,d dkcZfud ;kSfxd X dk iz;ksx foLr`r #i ls ifjj{kd ds #i esa fd;k tkrk gS

rFkk bldk vk.kfod lw= C2H4O2 gSA ;g ;kSfxd ,FksukWy ds lkFk vfHkfØ;k dj ,d
ehBh xa/k okyk ;kSfxd Y nsrk gSA
¼a½ ;kSfxd X dh igpku dhft,A 1
1
¼b½ ,FksukWy ds lkFk bldh vfHkfØ;k }kjk ;kSfxd Y cuus dk jklk;fud
lehdj.k fyf[k,A
¼c½ ;kSfxd Y ls fQj ;kSfxd X dSls izkIr fd;k tkrk gS \
¼d½ bl izØe dk uke nhft, rFkk laxr lehdj.k fyf[k,A 1
2
In the given diagram the experiment of conductivity of a salt solution is shown. 1+1+1+1+1=5
Labell against (1), (2), (3), (4) and (5).
Or
An organic compound X is widely used as a preservative in pickles and has a
molecular formula C2H4O2. This compound reacts with ethanol to form a sweet
smelling compound Y.
(a) Identify the compound X. 1
(b) Write the chemical equation for its reaction with ethanol to form compound 1
Y. 1
(c) How can we get compound X back from compound Y ? 2
(d) Name the process and write the corresponding equation.
Xkzqi B ¼tho foKku½
Group B (Biology)
19. rfU=dk rU= dh jpukRed vkSj dk;kZRed bdkbZ D;k gS \ 1

What is the structural and functional unit of Nervous System ?
20. ;hLV dksf’kdk fdl fof/k }kjk vySafxd tuu djrh gS \ 1
Through which process of asexual reproduction does a yeast cell reproduce ?
21. ty laj{k.k dh nks ikjEifjd fof/k;ksa dk mYys[k dhft,A 1
Mention two traditional methods of water conservation.
22. izfrorhZ pki D;k gS \ blds dkSu&dkSu ls ?kVd gSa \ 1+1=2
What is reflex arc ? What are its components ?
23. vySafxd tuu dh vis{kk ySafxd tuu ds D;k ykHk gSa \ 2
What are the advantages of sexual reproduction over asexual reproduction ?
24. vkstksu ijr ds vi{k; ds D;k nq"izHkko gks ldrs gSa \ 2
What can be bad impacts of depletion of Ozone layer ?
25. thok'e D;k gSa \ os tSo fodkl izØe ds fo"k; esa D;k n’kkZrs gSa \ 1½ +1½ =
3
What are fossils ? What do they tell us about the process of evolution ?
26. vki viuh thou&’kSyh esa D;k ifjorZu ykuk pkgsaxs ftlls gekjs lalk/kuksa ds laiks"k.k 3
dks izksRlkgu fey lds \

What changes would you incorporate in your life-style in a move towards a
sustainable use of our resources ?
27. ¼a½ gekjs 'kjhj esa yfldk dk dk;Z D;k gS \ 2+3=5
¼b½ ekuo g`n; dk LoPN fp= cukdj mlds eq[; Hkkxksa dks ukekafdr dhft,A
vFkok
¼a½ ck?kksa dh la[;k esa deh vuqokaf’kdrk ds n`f"Vdks.k ls fpUrk dk fo"k; D;ksa gS \ 3+2=5
¼b½ ekuo esa cPps dk fyax fu/kkZj.k dSls gksrk gS \
¼a½ What is the function of Lymph in our body ? 2+3=5

¼b½ Draw a neat diagram of human heart and label the main parts.
Or
¼a½ Why are the small numbers of surviving tigers a cause of worry from the point of 3+2=5
view of genetics ?
¼b½ How is the sex of the child determined in human beings ?

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MODEL QUESTION PAPER

dqy iz’uksa dh la[;k % 18 + 9 = 27 i`"Bksa dh dqy la[;k % 6

Lke; % 2½ ?kaVs iw.kkZad % 60

1. ijh{kkFkhZ ;FkklaHko vius 'kCnksa esa gh mÙkj nsaA

3. izR;sd iz’u ds fy;s fu/kkZfjr vad mlds lkeus vafdr gSaA

4. iz’uksa ds mÙkj fn;s x;s funsZ’k ds vkyksd esa gh fy[ksaA

9. xzqi A ds iz’u la[;k 13 ls 16 rd vkSj xzqi B ds iz’u la[;k 25 ,oa 26 rd ^^y?kqmÙkjh;&I”

Xkzqi A ¼HkkSfrdh ,oa jlk;u½

1. ysal dh {kerk dk SI ek=d D;k gS \ 1

lcls egRoiw.kZ ;qfDr D;k gS \

gq, izfrfcEc dk fdj.k vkjs[k [khafp,A

¼a½ X D;k gS & /kkrq ;k v/kkrq \

Balance the following equations :

Write name and colours of three wires used in domestic wiring.

¼b½ izfrjks/k fdls dgrs gSa \ bldk SI ek=d fyf[k,A

¼1½] ¼2½] ¼3½] ¼4½ rFkk ¼5½ dk ukekadu dhft;s %

,d dkcZfud ;kSfxd X dk iz;ksx foLr`r #i ls ifjj{kd ds #i esa fd;k tkrk gS

19. rfU=dk rU= dh jpukRed vkSj dk;kZRed bdkbZ D;k gS \ 1

dks izksRlkgu fey lds \

¼a½ What is the function of Lymph in our body ? 2+3=5

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