HP Board 10th Class Model Question Paper 2026 Science and Technology

HPBOSE
MODEL QUESTION
PAPERS

Model Question Paper
vkn”kZ iz”u i=
Class-X
d{kk nloha
Science & Technology
foKku vkSj izkS/kksfxdh
(2025-2026)
Time 3Hr. MM : 60
le; % 3 ?k.Vs vf/kdre vad % 60
General Instructions:
lkeU; funsZ”k%
(i) All questions are compulsory.
lHkh iz”u vfuok;Z gSA
(ii) Section-A: Question number 1 to 12 are objective type questions of one mark each.
Hkkx&d% iz”u la[;k 1&12 oLrqfu’B iz”Uk gSa vkSj izR;sd iz”u 1 vad dk gSA
(iii) Section-B: Question number 13 to 21 are of very short answer type questions and
each question is of 2 marks.
Hkkx&[k% iz”u la[;k 13&21 vfr y?kqmÙkjh; iz”u gS vkSj izR;sd iz”u 2 vad dk gSA
(iv) Section-C: Question number 22 to 26 are short answer type questions and each
question is of 3 marks.
Hkkx&x% iz”u la[;k 22&26 y?kqmÙkjh; iz”u gS vkSj izR;sd iz”u 3 vad dk gSA
(v) Section-D: Question no 27-29 are very long answer type question. All questions are
compulsory and of 5 marks each.
Hkkx&?k% iz”u la[;k 27&29 vfr nh?kZmÙkjh; iz”u gSA lHkh iz”u vfuok;Z gS vkSj izR;sd iz”u 5 vad
dk gSA
(vi) Draw labelled diagram in support of your answer wherever necessary.
tgka vko”;d gks] vius mÙkj ds lkFk ukekafdr fp= Hkh cukbZ,A
Section –A
Hkkx&d
Q1 A student performs an experiment to form aluminium chloride from aluminium
and chlorine. Which of the following option gives the chemical equation of the
reaction? (1)
(a) Al + Cl2 -AICI2 (b) 2Al + Cl2 2AICI
(c) 2Al + 3Cl2 2AICI3 (d) 3Al + 3Cl2 3AICl3
,d Nk= ,Y;wehfu;e vkSj Dyksjhu ls ,Y;wehfu;e DyksjkbM cukus ds fy, ,d iz;ksx djrk gSA
fuEu esa ls dkSu lk fodYi bl jklk;fud vfHkfØ;k ds jklk;fud lehdj.k dks iznf”kZr djrk gSA
(a) Al + Cl2 -AICI2 (b) 2Al + Cl2 2AICI
(c) 2Al + 3Cl2 2AICI3 (d) 3Al + 3Cl2 3AICl3

Q.2 Lactic Acid is present in (1)
(a) Orange. (b) Tea (c) Curd. (d) Vinegar
ySfDVd vEy fdlesa ik;k tkrk gSA
(a) larjk (b) pk; (c) ngha ¼d) fljdk
Q.3 A non-metal used to preserve food material is: (1)
a) Carbon. b) Phosphorus c) Sulphur. d) Nitrogen
[kk| inkFkksZ dks ifjjf{kr djus ds fy, fdl v/kkrq dk iz;ksx fd;k tkrk gS\
(a) dkcZu (b) QkWlQksjl (c) lYQj ¼d) ukbZVªkt
s u

Q.4) A carbon compound contains two atoms of carbon. Which name should the
carbon compound bear? (1)
(a) Butane. (b) Ethane (c) Methane d) Propane
,d dkcZfud ;ksfxd esa dkcZu ds nks ijek.kq gSA dkcZfud ;ksfxd dk uke D;k gks ldrk gS\
(a) C;qVu
s (b) ,Fksu (c) feFksu ¼d) izkis us
Q.5 Which statement is true for the reflection of light? (1)
(a) The angle of incidence and reflection are equal.
(b) The reflected light is less bright than the incident light.
(c) The sum of the angle of incidence and reflection is always greater than 90°.
(d) The beams of the incident light, after reflection, diverge at unequal angles.
izdk”k ds ijkorZu ds ckjs esa fuEu esa ls dkSu lk dFku lR; gS \
(a) vkiru dks.k] ijkorZu dks.k ds cjkcj gksrk gS
(b) ijkofrZr izdk”k] vkifrr izdk”k ls de pedhyk gksrk gS
0
(c) vkiru vkSj ijkorZu dks.k dk ;ksx 90 ls vf/kd gksrk gS
¼d) vkifrr izdk”k fdj.k ijkorZu ds ckn vleku dks.kks ij vilfjr gksrh gS
Q.6 In which part of the human eye is the image of an object formed? (1)
(a) Iris (b) Pupil (c) Retina (d) Cornea
ekuo us= esa fdl Hkkx ij oLrq dk izfrfcEo curk gS \
(a) ifjrkfjdk (b) iqryh (c) n`f’ViVy ¼d) LoPN eaMy
Q.7 Electrical resistivity of a given metallic wire depends upon (1)
(a) Its length (b) Its thickness (c) Its shape (d) Nature of the material
fdlh /kkrq dh rkj dh fo|qr izfrjks/kdrk fdl xq.k ij fuHkZj djrh gS\
(a) yackbZ (b) eksVkbZ (c) vkdkj ¼d) inkFkZ dh izd`fr
Q.8 An electric bulb is rated 220 V and 100 W. When it is operated on 110 V. the
power consumed will be - (1)
(a) 100 W (b) 75 W (c) 50 W (d) 25 W
fdlh fo|qr cYc dk vuqerkad 220V vkSj 100W gSA tc bls 110V ij izpfyr djrs gSa rc blds
}kjk iz;qDr “kfDr fdruh gksrh gS\
(a) 100 W (b) 75 W (c) 50 W (d) 25 W
Q.9 In amoeba, food is digested in the: (1)
(a) Food vacuole (b) Mitochondria (c) Pseudopodia (d) Chloroplast
vehck esa Hkkstu dk ikpu fdlesa gksrk gS\
(a) [kk| /kkuh (b) ekbVksdkWfUMª;k (c) dwVikn ¼d) DyksjksIykLV
Q.10 The gap between two neurons is called a (1)
(a) dendrite. (b) synapse. (c) axon. (d) impulse.
nks raf=dk dksf”kdkvksa ds e/; [kkyh LFkku dks dgrs gSa\
(a) nzqfedk (b) flusIl (c) ,DlkWu ¼d) vkosx
Q.11 The anther contains (1)
(a) sepals. (b) ovules. (c) pistil. (d) pollen grains
ijkxdks”k esa gksrs gSa
(a) ckãny (b) chtkaM (c) L=hdslj ¼d) ijkxd.k
Q.12The amount of energy that flows from one trophic level to another in a food chain is (1)
a) 5% b) 10% c) 20% d) 15%
fdlh [kk| J`a[kyk esa ,d iks’kh Lrj ls nwljs iks’kh Lrj rd izokfgr gksus okyh ÅtkZ dh ek=k gS&
a) 5% b) 10% c) 20% d) 15%

Section B
Hkkx&[k

Q13. Why should a magnesium ribbon be cleaned before burning in air? (2)
ok;q esa tykus ls igys eSXuhf”k;e fjcu dks lkQ D;ksa fd;k tkrk gS\
Q.14 While diluting an acid, why is it recommended that the acid should be added
to water and not water to the acid? (2)
vEy dks ruqd`r djrs le; ;g D;ksa vuq”kaflr djrs gSa] fd vEy dks ty esa feykuk
pkfg,] u fd ty dks vEy esa\
Q.15 A mixture of oxygen and ethyne is used for welding. Can you tell why a
mixture of ethyne and air is not used? (2)
osfYMax djus ds fy, vkWDlhtu vkSj ,Fkkbu dk feJ.k mi;ksx fd;k tkrk gSA D;k vki
crk ldrs gSa fd ,Fkkbu vkSj ok;q dk feJ.k D;ksa mi;ksx ugha fd;k tkrk\

Q.16 Why do we prefer a convex mirror is used as rear view mirror in vehicles? (2)
ge okguksa esa mÙky niZ.k dks i”p n`”; niZ.k ds :i esa ojh;rk D;ksa nsrs gSa\

Q.17 Light enters from air to glass having refractive index 1.50. What is the speed
of light in the glass? The Speed of light in vacuum is 3x108 ms-1. (2)
izdk”k ok;q ls 1-50 viorZukad ds dkap esa izo”s k djrk gSA dkap esa izdk”k dh pky D;k gS\
fuokZr esa izdk”k dh pky 3x108 ms-1.gS\

Q.18 Why is normal eye not able to see clearly the objects placed closer than
25 cm? (2)
lkekU; us= 25cm ls fudV j[kh oLrqvksa dks lqLi’V D;ksa ugha ns[k ikrs\

Q.19 Why is diffusion insufficient to meet the oxygen requirements of multicellular
organisms like humans? (2)
gekjs tSls cgqdksf”kdh; thoksa esa vkWDlhtu dh vko”;drk iwjh djus esa folj.k D;ksa
vi;kZIr gS\

Q.20 How is the movement of leaves of the sensitive plant different from the
movement of shoot towards light? (2)
NqbZ&eqbZ ikni dh ifÙk;ksa dh xfr] izdk”k dh vksj izjksg dh xfr ls fdl izdkj fHkUu gS\

Q.21 What is the purpose of making urine in the human body? Name the organ that
stores and release the urine? (2)
ekuo “kjhj esa ew= cuus dk D;k mn~n”s ; gS\ ml vax dk uke crkvks tks ew= dks laxfz gr
djrk gS vkSj ew= dks fu’dkflr djrk gS\
OR
Which hormone is present in the areas of rapid cell division in a plant and
which hormone inhibits growth? (2)
ikS/kksa esa rhoz dksf”kdk foHkktu okys {ks=ksa esa dkSu lk gkeksZu ik;k tkrk gS vkSj dkSu lk
gkeksZu o`f) dk laneu djrk gS\

Section-C
Hkkx&x
Q.22 The following questions consist of two statements assertion-A and reason -R
Answer these questions selecting the appropriate option given in below
a) both A and R are true and R is correct explanation of A
b) both A and R are true and R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
uhps fn;s x;s iz”uksa esa nks dFku vfHkdFku-A vkSj dkj.k-R fn, x, gSaA uhps fn, x, mfpr
fodYi dk p;u djds bu iz”uksa ds mÙkj nhft,&
(a) A vkSj R nksuksa lR; gSa vkSj R, A dk lgh Li’Vhdj.k gS
(b) A vkSj R nksuksa lR; gSa vkSj R, A dk lgh Li’Vhdj.k ugha gS
(c) A lR; gS] ijUrq R vlR; gS
¼d) A vlR; gS] ijUrq R lR; gS
(i) Assertion: Rusting of iron is endothermic in nature (1)
Reason : As the reaction is slow the release of heat is barely evident.
vfHkdFku- A % yksgs esa tax yxuk ,d Å’ek”kks’kh izdf` r dh vfHkfØ;k gSA
dkj.k - R % D;ksafd ;g ,d /kheh izfØ;k gS blfy, gesa Å’ek mRiUu gksrs gq, fn[kkbZ ugha nsrhA
(ii) Assertion: A compass needle is placed near a current carrying wire the
deflection of the compass needle decreases when the magnitude of the
current in the wire is increased (1)
Reason :The strength of magnetic field at a point near the conductor
increases on increasing the current.
vfHkdFku- A % ,d fn”kklwpd lwbZ dks ,d fo|qr /kkjkokgh pkyd ds ikl j[kk x;k gSA fo|qr
/kkjk dk ifj.kke c<+us ij fn”kklwpd lwbZ dk fo{ksi.k de gks tkrk gSA
dkj.k - R % fo|qr /kkjk dk ifjek.k c<+us ij pkyd ds fudV fLFkr ,d fcUnw ij
pqca dh; {ks= dh “kfDr c<+ tkrh gSA
(iii) Assertion: The use of chemical like CFCs has endangered the ozone layer
Reason: Since the ozone layer protect against the ultraviolet radiations from
the sun, this could damage the environment. (1)
vfHkdFku- A % CFC tSls jlk;uksa ds mi;ksx ds dkj.k vkstksu ijr ds fy, [krjk mRiUu
gks x;k gSA
dkj.k - R % D;ksafd vkstksu ijr lw;Z ls vkus okyh gkfudkjd ijkcSaxuh fofdj.kksa ls
lqj{kk djrh gS] blfy, blls i;kZoj.k dks uqdlku igqp ldrk gSA
Q.23 The refractive indices of three media are given below: (1+2=3)
Medium Refractive index
A 1.6
B 1.8
C 1.5

A ray of light is travelling from A to B and another ray is travelling from B to C.
(a) In which of the two cases the refracted ray bends towards the normal?
(b) In which case does the speed of light increase in the second medium?
Also give reasons for your answer.

rhu ek/;eksa ds vioÙkZukad uhps fn, x, gS
ek/;e vioÙkZukad
A 1.6
B 1.8
C 1.5
,d izdk”k fdj.k ek/;e A ls B esa tk jgh gS rFkk ,d vU; izdk”k fdj.k ek/;e B ls C esa tk jgh gSA
(a) nksuksa esa ls fdl fLFkfr esa viofrZr fdj.k vfHkyac dh vksj eqMsx+ h\
(b) nksuksa esa ls fdl fLFkfr esa nwljs ek/;e esa tkus ij izdk”k dh pky c<+ tk,xh\
OR
Why is tungsten used almost exclusively for filament of electric lamps? (3)
fo|qr ySEiksa ds rarqvksa ds fuekZ.k esa izk;% ,dek= VaxLVu dk gh mi;ksx D;ksa fd;k tkrk gS\
Q.24 A solution of a substance X is used for whitewashing. (1+2=3)
(a) Name the substance X and write it’s formula?
(b) write the reaction of the substance 'X' named in (a) above with water.
fdlh inkFkZ X ds foy;u dk mi;ksx lQsnh djus ds fy, gksrk gSA
(a) inkFkZ X dk uke rFkk bldk lw= fyf[k,A
(b) Åij (a) esa fy[ks inkFkZ X dh ty ds lkFk vfHkfØ;k fyf[k,A
OR
What are two properties of Carbon which lead to the large nu number
mber of carbon
Compounds we see around us? (3)
dkcZu ds nks xq.k/keZ dkSu ls gSa] ftuds dkj.k gekjs pkjksa vksj dkcZu ;kSfxdksa dh fo”kky
la[;k fn[kkbZ nsrh gS\
Q.25 The sex of new born child is a matter of chance and none of the parents may
be considered responsible for it. Justify this statement with the help of flow
chart showing sex determination in human beings. (3)
uotkr f”k”kq dk fyax fu/kkZj.k la;ksx dh ckr gS vkSj blds fy, ekrk&firk esa ls fdlh dks
Hkh ftEesnkj ugha ekuk tk ldrkA ekuo ekuo esa fyax fu/kkZj.k dks n”kkZus okys ¶yks&pkVZ dh
lgk;erk ls bl dFku dh iqf’V djsaA
OR
Differentiate between external- fertilization and internal fertilization. (3)
ckã fu’kspu vkSj vkarfjd fu’kspu esa varj Li’V djsaA

Q.26 Study the food chain given below and answer the questions that follow: (1+2=3)
uhps nh xbZ [kk| J`a[kyk dk v/;;u djsa vkSj mlds uhps fn, x, iz”uksa ds mÙkj fy[ksa&

iÙkh dSVjfiyj fxjfxV

usoyk lkai

(a) If the amount of energy available at the third trophic level is 100 Joules, then how
much energy will be available at producer level? Justify your answer.
;fn rhljs iks’kh Lrj ij 100 twy ÅtkZ miyC/k gS] rks mRiknd Lrj ij fdruh ÅtkZ miyc/k
gksxh\ vius mÙkj dh iq’Vh djsaA
(b) Is it passible to have 2 more trophic levels in this food chain just before the
Fourth trophic level? Justify your answer.
D;k nh xbZ [kk| J`a[kyk esa pkSFks iks’kh Lrj ls igys nks vkSj iks’kh Lrj gks ldrs gSa\ vius mÙkj dh
iqf’V djsaA
Section-D
Hkkx&?k
Q.27 What is corrosion? What are essential conditions for corrosion? Write different
methods to prevent corrosion. (5)
la{kkj.k D;k gS\ la{kkj.k ds fy, vko”;d ifjfLFkfr;ka D;k gS\ la{kkj.k dks jksdus ds
fofHkUu rjhds fyf[k,A
OR
Define the following teams. (1+1+1+1+1=5)
(a) Mineral. (b) Ore (c) Gangue (d) Rancidity. (e) Precipitate.
fuEu inksa dh ifjHkk’kk fyf[k,&
(a) [kfut (b) v;Ld (c) xSax (d) fod`rxaf/krk (e) vo{ksi

Q.28 A concave lens has focal length of 15 cm. At what distance should the object
from the lens be placed so that it forms an image at 10 cm from the lens?
Also, find the magnification produced by the lens. (5)
fdlh vory ysal dh Qksdl nwjh 15 cm gSA fcac dks ysl a ls fdruh nwjh ij j[ksa fd
blds }kjk fcac dk ysl
a ls 10 cm nwjh ij izfrfcac cus\ ysal }kjk mRiUu vko/kZu Hkh Kkr
dhft,A
OR
a) Draw magnetic field lines around a bar magnet.
b) Why don't two magnetic field lines intersect each other? (2+3)
(a) fdlh NM+ pqc a d ds pkjksa vksj pqacdh; {ks= js[kk, [khafp,A
(b) nks pqacdh; {ks= js[kk,a ,d nwljs dks izfrPNsn D;ksa ugha djrha\

Q.29 Explain the process of excretion in human beings with well labelled diagram. (5)
ekuo esa mRltZu dh izfØ;k dk ukekafdr fp= lfgr o.kZu dhft,A
OR
a) A Doctor has advised Sameer to reduce sugar in take in his diet and do regular
exercise after checking his blood test report. Which disease do you think
Sameer is suffering from? Name the hormone responsible for this disease and
the organ producing the hormone ? (3)
b) If a woman is using a copper-T, will it help her in protecting her from sexually
transmitted diseases? (2)
(a) MkWDVj us jDr ijh{k.k dh fjiksVZ ns[kus ds ckn lehj dks vkgkj esa phuh ¼”kdZjk½ dk lsou de
djus rFkk fu;fer O;k;ke jus dh lykg nh gSA vkidks D;k yxrk gS] fd lehj fdlh chekjh ls
ihfM+r gS\ bl chekjh ds fy, ftEesnkj gkeksZu dk uke vkSj ml gkeksZu dk mRiknu djus okys
vax ¼xzafFk½ dk uke crkb,A
(b) ;fn dksbZ efgyk dkWij&Vh dk iz;ksx dj jgh gS rks D;k ;g mldh ;kSu lapkfjr jksxksa ls j{kk
djsxk\

Distribution of Marks and Blue Print
Division of Marks

Sr. No. Type of Marks No. Of Total Marks
Questions allotted Questions
1 Objective 1 12 12
type
2 Very Short 2 9 18
Answer
3 Short Answer 3 5 15
4 Long Answer 5 3 15
Total - 29 60

Distribution
Unit Unit Chapters Covered Marks
No.
I Chemical Substances Chapter- 1: Chemical reaction and 19
Nature and behaviour. equations.
Chapter-2: Acids, Bases and Salts
Chapter-3: Metals and Non-Metals
Chapter-4: Carbon and its compounds.
II Work of living Chapter- 5: Life processes 19
Chapter-6: Control and coordination
Chapter-7: How to organisms
reproduce?
Chapter-8: Heredity.
III Natural Phenomena and Chapter- 9: Light-Reflection and 18
effects of current refraction.
Chapter-10: The human eye and the
colourful world.
Chapter-11: Electricity
Chapter-12: Magnetic effects of electric
current.
IV Natural Resources Chapter-13: Our Environment 4
Total Marks 60

Unit-I Chemical Substances, Nature and behaviour.
Questions Marks
4 Questions (MCQ) 4 Marks
1 Question (Assertion-reason) 1 Mark
3 Questions (Very short answer) 6 Marks
1 Question (Short answer) 3 Marks
1 Question (long answer) 5 Marks
10 Questions 19 Marks
Chapter-1 chemical reactions and equation:-
Chemical equations, balanced chemical equation, types of chemical
equations- combination. Decomposition, displacement double
displacement, precipitation, endothermic, exothermic and
redox(oxidation-reduction)reactions. Effect of oxidation and reduction
reactions in everyday life- corrosion and rancidity.
Chapter-2: Acid, bases and salts:-
Chemical properties of acids and bases, concept of ph scale,
Importance of ph in everyday life, Chemicals from common salt,
Preparation and uses of Sodium Hydroxide, Bleaching powder, Baking
soda, Washing soda and plaster of paris. Concept of water of
crystallisation.
Chapter-3: Metals and Non-Metals :-
Physical and chemical properties of metals and Non-Metals. Reactivity
series. Formation and properties of ionic compounds, Basic
metallurgical process, corrosion and its prevention.
Chapter-4: Carbon- compounds:-
Covalent bonding, Versatile nature of carbon, Saturated and
Unsaturated. Carbon compounds, Nomenclature of carbon
compounds, Chemical properties of carbon compounds, Ethanol and
Ethanoic acid (properties and uses), Soaps and detergents, Cleaning
action of soaps(Micelles formation).
Unit-II: World of Living.
Questions Marks
4 Questions(MCQ) 04 Marks
1 Question (Assertion-reason) 01 Mark
3 Questions(Very short answers) 06 Marks
1 Question (Short answer) 03 Marks
1 Question (Long answer) 05 Marks
10 Questions 19 Marks
Chapter-5: Life processes:-
Living being. Basic concept of Nutrition. Respiration, Transportation
and excretion in Human-beings and Plants.
Chapter-6: Control and Coordination:-
Animal’s nervous system, Reflex action, Human Brain, Coordination in
plants, Tropic movements in plants, Plant hormones, Hormones in
animals.
Chapter-7: How do organisms Reproduce? :-

Different modes of reproduction in plants and animals, Importance of
sexual-reproduction, Sexual Reproduction in plants, Reproduction in
Human beings, Reproductive Health, Different methods of family
planning.
Chapter-8: Heredity :-
Accumulation of variation during reproduction, Heredity, Mendel’s
contributions rules for inheritance of traits. How do the traits get
expressed? Sex determination.
Unit-III : Natural Phenomena and effects of current [18 Marks]

Questions Marks
3 Questions (MCQ) 3 Marks
1 Question (Assertion- 1 Mark
reason)
3 Questions (Very short 6 Marks
answer)
1 Question (Short answer) 3 Marks
1 Question (Long answer) 5 Marks
9 Questions 18 Marks
Chapter-9: Light-Reflection and refraction:-
Reflection of light spherical mirrors:- concave and convex,
Representation of images formed by mirrors using ray diagrams mirror
formula and magnification, refraction of light through glass slab and
lenses, Image formation by lenses, Lens formula and magnification,
uses of mirrors and lenses power of lens.
Chapter-10: The Human Eye and the colourful world :-
The human Eye, Power of accommodation, defects of vision and their
correction, Refraction of light through prism, Dispersion of light,
atmosphere Refraction ,Scattering of light.
Chapter-11: Electricity:-
Electric current, electric potential and potential difference, Circuit
diagram, Ohm’s law, Factors on which the resistance of a conductor
depends, Series combination of resistors. Parallel combination of
resistors, Heating effects of electric current and its practical
applications, Electric Power.
Chapter -12: Magnetic effect of electric current: -
Magnetic field and field lines, Magnetic field due to a current carrying
conductor right hand thumb rule, Magnetic field due to a current
carrying conductor in a magnetic field, Fleming’s left hand rule,
Domestic Electric circuits.

Unit IV : Natural Resources [4 Marks]
Questions Marks
1 Question(MCQ) 1 Mark
1 Question(Short Answer) 3 Marks
2 Questions 04 Marks

Chapter-13: Our Environment:-
Eco-System, Food Chains and webs, Ozone layer and its depletion,
Managing the garbage we produce, Biodegradable and non-
biodegradable substances.

Model Question Paper Solution
Class-X

Science

Section – A Marking

Q. 1 - C 01

Q.2 - C 01

Q.3 - D 01

Q.4 - B 01
Q.5 - A 01

Q.6 - C 01

Q.7 - D 01

Q.8 - D 01

Q.9 - A 01

Q.10 - B 01

Q.11 - D 01

Q.12 - B 01
Assertion/Reason

Q.13 - D 01

Q.14 - D 01

Q.15 - A 01

Section-B

Q.16

{Magnesium is a reactive metal. It combines with oxygen in air to form a layer of
magnesium oxide on its surface.} {Hence, it should be cleaned with a sand paper
before burning to remove the oxide layer formed on its surface.}

Q.17

{The process of adding water to an acid is highly exothermic,} {therefore it is always
recommended that acid should be added to water.} {If it is done the other way, then it
might be possible that because of the large amount of heat generated, the mixture
may splash out and cause burns.}

Q.18.

{When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete
combustion caused by limited supply of air.} {However, if ethyne is burnt with oxygen,
it gives a clean flame with temperature 3000°C because of complete combustion.
This oxy-acetylene flame is used for welding.} { It is not possible to attain such a high
temperature without mixing oxygen. This is the reason why a mixture of ethyne and
air is not used.}
Q.19

{Convex mirrors are commonly used as rear- view (wing) mirrors in vehicles because
they give an erect, virtual, full size diminished image of distant objects with a wider
field of view.} {Thus, convex mirrors enable the driver to view much larger area than
would be possible with a plane mirror.}

Q 20

Given That,
Refractive index 𝜇 = 1.50
Speed of light c = 3 x 108 m/s
We Know that
ng = c/vg
vg =
.
vg = 2 x 108 m/s
Hence the speed of light in glass is 2 x 108 m/s
Q.21

{The eye is not able to decrease the focal length beyond a limit. When the eye is
focused on a closer object, the ciliary muscles are strained and the focal length of
the eye-lens decreases.} {Because of some reason, the eye is not able to decrease
the focal length beyond a limit, hence a normal eye is not able to see objects closer
than 25 cm.}

Q.22

{Multicellular organisms such as humans possess complex body designs. They have
specialised cells and tissues for performing various necessary functions of the body
such as intake of food and oxygen.} {Unlike unicellular organisms, multicellular cells
are not in direct contact with the outside environment. Therefore, diffusion cannot
meet their oxygen requirements}.

Q.23

{The movements of the leaves of the sensitive plant are touch-sensitive and
independent of growth known as thigmonasty. While the movement of the shoot
towards light is growth-} {related and known as phototropism.A plant's response to
light is called phototropism. Phototropism occurs in plants when they respond to
sunlight.}

Q.24

{To filter out nitrogenous waste products like urea and uric acid from the blood in
humans.}

{Organ for storage: Urinary Bladder}
{Organ for release: Urethra}

Q.25

{Tungsten has the highest melting point (3695K), lowest vapour pressure and
greatest tensile strength among all the metals. It can reach higher temperatures
before melting and hence can emit brighter light.} {Also, the light emitted due to
heated tungsten lies in the visible spectrum and is yellow in colour which makes it
the most preferred material for filament of electric bulbs.}

Q.26

The two properties of carbon which lead to huge number of compounds:
compounds:--

(i) Catenation: Catenation means car
carbon
bon atoms have the tendency to link with one
another through covalent bonds to form chains and rings.

(ii) Tetravalency: The valency of Carbon atom is 4 ,so it capable of bonding with four
other atoms of carbon or atoms of some other element.

Q.27
{The sperm has either X or Y chromosome, while the egg has only X chromosome.
So, if the sperm carrying Y chromosome fuses with the egg, it results in the formation
of a male child; and if the sperm carrying X chromosome fuses with the egg, it
results in the formation of a female child.}

{Thus, there is an equal chance of fusion of either X or Y chromosome with the egg.

Therefore, we can say that the sex of a newborn child is a matter of chance and
none of the parents are responsible for it.}

Sex determination in humans is shown below:-

Q.28

{a) 10000J because only 10% of energy is available for the next trophic level.}

b) No, since the loss of energy at each step is so great that very little usable energy
will remain after 4 trophic level.

Q.29

{Corrosion is the phenomenon of attacking the surface of a metal by air and
moisture, so the metal gets corrodes.}

Necessary conditions for corrosion are:

1. Presence of oxygen and air.

2. Presence of water and moisture.

3. Metals placed higher in the activity series.

Methods for prevention of corrosion The rusting of iron can be prevented by
greasing, painting, galvanizing, anodizing, or oiling the surface. These methods can
be classified into the following categories:

1. Galvanization: Galvanized metal is coated with a thin layer of zinc to protect it
against corrosion. The zinc oxidizes when it is exposed to air creating a protective
coating on the metal surface.

2. Alloying: It is the method of improving the properties of a metal by mixing the
metal with another metal or nonmetal. When iron is alloyed with chromium and nickel
in stainless steel is obtained. Stainless steel does not rust at all.

3. Painting: Rusting of iron can be easily prevented by coating the surface with paint
which protects iron from air and moisture.

Q.30
Given:

Image distance, v = - 10cm Focal length, f = - 15cm [f is-ve for a concave lens]

To find: We have to find the object distance, u

Solution:

Using lens formula, 1/v - 1/u = 1/f we have, 1/u = 1/v - 1/f 1 -10 = (- 3 + 2)/30 1 30
So, u = - 30cm 1 -15 =

Thus the object should be placed at a distance of 30cm from the lens on the left side.

We know, Magnification= m = m = - 10/- 30 m = 1/3 m = 0.33(Positive) Thus the
image is virtual, erect and diminished.

Hence, The object distance = 30cm Magnification = 3 = 0.33

Q.31

a) Sameer is suffering from diabetes.
The hormone responsible for diabetes is insulin .

The organ producing the hormone is pancreas .

b) The hormone present in the area of rapid cell division in a plant is cytokinine
and the hormone which inhibits the growth is abscisic acid.

Prepared by:
1 Sh.Akshay Kumar Sharma, TGT Med. GSSS Bala (BLP)
2 Sh Sushil Chauhan, TGT Med. GSSS Bahanwin ( HMR)

Model Question Paper
vkn”kZ iz”u i=
Class-10th
कक्षा दसव ीं
Science & Technology
ववज्ञान और प्रौधोविक
(E-Series)
Time : 4Hr. MM: 80
समय: 4 घण्टे अवधकतम अींक 80
General Instructions:
सामन्य वनदे शः
(i) All questions are compulsory.
सभीप्रश्नअनिवार्यहै।
(ii) Section-A: Question number 1 to 16 are objective type questions of one mark each.
भाग-कः प्रश्न संख्या 1-16 वस्तुनिष्ठ प्रश्न हैं और प्रत्येक प्रश्न 1 अंक का है ।
(iii) Section-B: Question number 17to 25 are of very short answer type questions
and each question is of 3 marks.
भाग-खः प्रश्न संख्या 17-25 अनि लघु उत्तरीर् प्रश्न है और प्रत्येक प्रश्न 3 अंक का है ।
(iv) Section-C: Question number 26 to 30 are short answer type questions and
each question is of 3.5marks.
भाग-गः प्रश्न संख्या 26-30 लघु उत्तरीर् प्रश्न है और प्रत्येक प्रश्न 3.5 अंक का है ।
V) Section-D: Question no 31-33 are very long answer type question. All
questions are compulsory and of 6.5 marks each.
भाग-घः प्रश्न संख्या 31-33 अनि दीघय उत्तरीर् प्रश्न है । सभी प्रश्न अनिवार्य है और
प्रत्येक प्रश्न 6.5 अंक का है ।

Section -A
भाि-क
Q1 Balance the chemical equation: Ag + Cl2 → AgCl
A. 2Ag + Cl2 →2AgCl
B. Ag + Cl2 → Ag Cl2
C. 2Ag + Cl →2AgCl
D. None of above

रासार्निक अनभनिर्ा को संिुनलि कीनिए: Ag + Cl2 → AgCl
A. 2Ag + Cl2 →2AgCl
B. Ag. + Cl2 → Ag Cl2
C. 2Ag. + Cl. →2AgCl
D. उपरोक्त में ls कोई िहीं
Q.2 Lactic Acid is present in
(a) Orange. (b) Tea (c) Curd. (d)Vinegar
लैक्टिक अम्ल नकस में पार्ा िािा है ।
(a) संिरा (b) चार् (c) दहीं (d) नसरका

Q.3 A non-metal used to preserve food material is:
a) Carbon. b) Phosphorus c) Sulphur. d) Nitrogen
खाद्य पदार्थों को परररनिि करिे के नलए नकस अधािु का प्रर्ोग नकर्ा िािा है
(a) कार्यि. (b) फॉसफोरस c) सल्फर (d) नाइट्र ोजन

Q.4 A carbon compound contains two atoms of carbon. Which name should the
carbon compound bear?
(a) Butane. (b) Ethane. C). Methane d) Propane
एक कार्यनिक र्ोनगक में कार्यि के दो परमाणु है । कार्यि र्ौनगक का क्या िाम
होगा?
a. ब्यूट्ेन (b) एर्थेि (c) मीर्थेि d) प्रोपेि
Q.5 Which statement is true for the reflection of light?
(a) The angle of incidence and reflection are equal.
(b) The reflected light is less bright than the incident light.
(c) The sum of the angle of incidence and reflection is always greater than 90°.
(d) The beams of the incident light, after reflection, diverge at unequal angles.
प्रकाश के परावियि के र्ारे में निम्न में से कौि सा कर्थि सत्य है ?
(a) आपिि कोण, परावियि कोण के र्रार्र होिा है
(b) परावनियि प्रकाश, आपनिि प्रकाश से कम चमकीला होिा है
(c) आपिि और परावियि कोण का र्ोग 90° से अनधक होिा है
(d) आपनिि प्रकाश नकरण परावियि के र्ाद असमाि कोण पर अपसररि होिी है ।
Q.6 In which part of the human eye is the image of an object formed?
(a) Iris (b) Pupil C) Retina d) Cornea
मािव िेत्र में नकस भाग पर वस्तु का प्रनिनर्म्व र्ििा है ?
(a) पररिाररका (b) पुिली (c) दृनिपटल (d) स्वच्छमंडल
Q.7 Electrical resistivity of a given metallic wire depends upon
A. it’s length B. Its thickness C. it’s shape D. nature of material
धािु की िार की नवद् र्ुि प्रनिरोधकिा नकस गुण पर निभयर करिी है ?
(a) लंर्ाई b. गोटाई. C. आकार। d पदार्थय की प्रकृनि
Q.8 what is the electronic configuration of Na+?
A 2,8,1 B. 2,8,2 C. 2,8 D. 2,7
सोनडर्म आर्ि का इलेिरॉनिक नवन्यास नलक्टखए?
A 2,8,1 B. 2,8,2 C. 2,8 D. 2,7
A.
Q.9 In amoeba, food is digested in the:1)
(a) Food vacuole (b) Mitochondria (c) Pseudopodia (d) Chloroplast
अमीर्ा में भोिि का पाचि नकस में होिा है ?
(a) खाद्यधािी (b) माइटोकॉक्टररर्ा (c) कूटपाद (d) क्लोरोप्लास्ट
Q.10 The gap between two neurons is called a..
A. Dendrites. (b) synapse. C. Axon d. impulse.
दो िंनत्रका कोनशकाओं के मध्य खाली स्थाि को कहिे हैं ?
(a) डें डराइट् (b) नसिेप्स (c) एक्सॉि (d) आर्ेग
Q.11 The anther contains
(a) sepals. (b) ovules. (c) pistil. (d) pollen grains.
परागकोश में होिे हैं
(a) सेंपल। (b) र्ीिां ड (c) स्त्रीकेसर (d) परागकण
Q. 12 The amount of energy that flows from one trophic level to another in a food
chain is।
a) 5% b) 10% c) 20% d) 15%
नकसी खाद्य श्ृंखला में एक पोषी स्तर से दू सरे पोषी स्तर िक प्रवानहि होिे वाली
ऊिाय की मा
a) 5% b) 10% c) 20% d) 15%
Q13. fdlh inkFkZ ls vkWDlhtu ds fudyus dks dgk tkrk gS:-
a) mip;u b) la{kkj.k c) vip;u d) fod`rxaf/krk
The removal of oxygen from a substance is called:
a) Oxidation b) Corrosion c) Reduction d) Rancidity

Q. 14. नपत्तरस निम्न में से नकससे स्रानवि होिा है ?
a) isV b) vXuk”k; c) NksVh vkar d) ;d`r
Bile juice is secreted by
a) Pancreas b) Stomach c) Liver d) Small intestine

Q. 15. उस भौनिक रानश का िाम र्िाइए निसका मात्रक ओहम है ।
A. धारा
B. नवभवां िर
B. प्रनिरोध
C. इिमें से कोई िहीं
What is the name of the physical quantity whose unit is Ohm ?
A. Current
B. Potential difference
C. Resistance
D. None of these
Q. 16. आहार श्ृंखला में पहला पोषी स्तर ................है ।
A. उपभोक्ता
B. मां साहारी
C. उत्पादक
D. इिमें से कोई िहीं
........... .........are the first trophic level in a food chain
A. Consumers
B. Larger Carnivores
C. Producers
D. None of these
Section B
भाि-ख
Q17. Why should a magnesium ribbon be cleaned before burning in air?
वार्ु में िला िे से पहले मैग्नीनशर्म ररर्ि को साफ क्यों नकर्ा िािा है ? (3)

Q.18 While diluting an acid, why is it recommended that the acid should be added
to water and not water to the acid? (3)
अम्ल को ििु कृि करिे समर् र्ह क्यों अिुशंनसि करिे हैं , नक अम्ल को िल में नमलािा
चानहए,ि नक िल को अम्ल में?

Q. 19 Why plaster of paris is stored in a moisture proof container? (3)
प्लास्टर ऑफ पेररस को आर्द्यरोधी र्ियि में क्यों रखा िािा है ?

Q.20 Why do we prefer a convex mirror is used as rear view mirror in vehicles? (3)
हम वाहिों में उत्तल दपयण को पश्चदृश्य दपयण के रूप में वरीर्िा क्यों दे िे हैं ?

Q.21 What is the role of saliva in the digestion of food? (3)
भोिि के पाचि में लार की क्या भूनमका है ?

Q.22 Why is normal eye not able to see clearly the objects placed closer than 25
cm? (3)
सामान्य िेत्र 25cm से निकट रखी वस्तुओं को सुस्पि क्यों िहीं दे ख पािे ?
Q.23 Why is diffusion insufficient to meet the oxygen requirements of multicellular
organisms like humans? (3)
हमारे िैसे र्हु कोनशकीर् िीवों में ऑक्सीिि की आवश्यकिा पूरी करिे में नवसरण क्यों
अपर्ाय प्त है ?

Q.24 How is the movement of leaves of the sensitive plant different from the
movement of shoot towards light? (3)
छु ई मुई पादप की पनत्तर्ों की गनि, प्रकाश की ओर प्ररोह की गनि से नकस प्रकार नभन्न है ?
Q.25 What is the purpose of making urine in the human body? Name the organ that
stores and release the urine? (3)
मािव शरीर में मूत्र र्ििे का क्या उद्दे श्य है ? उस अंग का िाम र्िाओ िो मूत्र को संग्रनहि
करिा है और मूत्र को निष्कानसि करिा है ?
OR

Which hormone is present in the areas of rapid cell division in a plant and
which hormone inhibits growth? (3)
पौधों में िीव्र कोनशका नवभािि वाले िेत्रों में कौि सा हामोि पार्ा िािा है और कौि सा
हामोि वृक्टि का संदमि करिा है ?
Section-C
भाि-ि

Q.26 How does wind efficient different from multiple fission? (3.5)
निखंडि र्हूखंडि से नकस प्रकार नभन्न है ?
OR
Why is tungsten used almost exclusively for filament of electric lamps?
नवद् र्ुि लैम्ों के िंिुओं के निमाय ण में प्रार्ः एक मात्र टं गस्टि का ही उपर्ोग क्यों नकर्ा िािा
है ? (3.5)

Q.27 What is homologous series? Explain with an example.
letkrh; Js.kh D;k gS\ mnkgj.k lfgr le>kb,A (3.5)
Q.28 How is the sex of child determined in human beings?
मािव में र्च्चे का नलंग निधाय रण कैसे होिा है ? (3.5)
OR
Differentiate between external- fertilization and internal fertilization.
र्ाह्य निषेचि और आं िररक निषेचि में अंिर स्पि करें ।
Q29 Why are some substances biodegradable and some non-biodegradable?
D;k dkj.k gS fd dqN inkFkZ tSo fuEuhdj.kh; gksrs gS vkSj dqN vtSo fuEuhdj.kh;\
(3.5)
Q30 The refractive index of diamond is 2.42. What is the meaning of this statement?
ghjs dk viorZukad 2-42 gSA bl dFku dk D;k vfHkizk; gS\
(3.5)
Section-D
भाि-घ
Q.31 What is corrosion? What are essential conditions for corrosion? Write different
methods to prevent corrosion. (6.5)
संिारण क्या है ? संिारण के नलए आवश्यक पररक्टस्थनिर्ां क्या है ? संिारण को रोकिे के
नवनभन्न िरीके नलक्टखए।
OR
Define the following terms
(a) Mineral. (b) Ore. (c) Gangue (d) Rancidity. (e) Precipitate.
निम्न पदों की पररभाषा नलक्टखए-
(a) खनिि (b) अर्स्क (c) गैंग (d) नवकृिगंनधिा (e) अविेप

(1+1.5+1+1.5+1.5=6.5)

Q.32 A concave lens has focal length of 15 cm. At what distance should the object
from the lens be placed so that it forms an image at 10 cm from the lens?
Also, find the magnification produced by the lens. (6.5)
नकसी अविल लेंस की फोकस दू री 15 cm है । नर्ंर् को लेंस से नकििी दू री पर रखें नक
इसके िारा नर्ंर् का लेंस से 10 cm दू री पर प्रनि नर्ंर् र्िे ? लेंस िारा उत्पन्न आवधयि भी
ज्ञाि कीनिए।
OR

a) Why do stars twinkle?
b) Why don't two magnetic field lines intersect each other? (3+3.5)
a) िारे क्यों नटमनटमािे हैं ?
(b) दो चुंर्कीर् िेत्र रे खाएं एक दू सरे को प्रनिच्छे द क्यों िहीं करिीं ?

Q.33 Explain the importance of pH with the help of suitable example in your day to
day life.5
अपिे दै निक िीवि में pHके महत्व के उदाहरणों की सहार्िा से व्याख्या कीनिए:
OR
Differentiate between metals and non metals on the basis of their chemical
properties. (6.5)
धािु और अधािु में रासार्निक गुणधमय के आधार पर अंिर स्पि कीनिए।

Distribution of Marks and Blue Print
Division of Marks

Sr. No. Type of Marks No. Of Total Marks
Questions allotted Questions
1 Objective 1 16 16
type
2 Very Short 3 9 27
Answer
3 Short Answer 3.5 5 17.5
4 Long Answer 6.5 3 19.5
Total - 33 80

Distribution
Unit Unit Chapters Covered Marks
No.
I Chemical Substances Chapter- 1: Chemical reaction and 25
Nature and behaviour. equations.
Chapter-2: Acids, Bases and Salts
Chapter-3: Metals and Non-Metals
Chapter-4: Carbon and its compounds.
II Work of living Chapter- 5: Life processes 25
Chapter-6: Control and coordination
Chapter-7: How to organisms
reproduce?
Chapter-8: Heredity.
III Natural Phenomena and Chapter- 9: Light-Reflection and 24
effects of current refraction.
Chapter-10: The human eye and the
colourful world.
Chapter-11: Electricity
Chapter-12: Magnetic effects of electric
current.
IV Natural Resources Chapter-13: Our Environment 6
Total Marks 80

AglaSem Earn While You Learn Program!

Share your recent question papers with us and get paid!
अपने हाल के न प हम भेज और कमाएँ!

To participate, email us with the following details:
भाग लेने के लए हम न न ववरण के साथ ईमेल कर:

- Your Name
- Your Class
- Your Board
- Details of the Question Papers you have
आपके पास उपल ध न प का ववरण

Our team will reach out to you with the next steps.
हमार ट म आगे क या के लए आपसे संपक करे गी।

Email: support@

Study Materials
Notes

Model Papers Class 6 Notes

Sample Papers Class 7 Notes
Half Yearly Sample Papers Class 8 Notes

Class 9 Notes
Important Resources
Class 10 Notes
Periodic Table
Class 11 Notes
Writing Skills / Formats

Maps of India / World Class 12 Notes

Books and Solutions

NCERT Books
NCERT Book Solutions
HC Verma Chapter Wise Solutions
RD Sharma Solutions
CGBSE Solutions