MODEL QUESTION PAPER SCIENCE (THEORY) CLASS – X

MODEL QUESTION PAPER

SCIENCE (THEORY)

CLASS – X

MODEL QUESTION PAPER CLASS - X SCIENCE ( Theory )

dqy iz’uksa dh la[;k % Total No. of Questions :

Lke; %

2½

18 + 9 = 27 18 + 9 = 27

?kaVs

Time : 2 ½ Hours

i`"Bksa dh dqy la[;k

% 6

Total No. of Pages

: 6

iw.kkZad %

60

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

Write the functional group present in HCHO.

1

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 \ Why is the colour of the clear sky blue ?

3

14.

fuEu lehdj.kksa dks larqfyr dhft, %

1+1+1 = 3

Balance the following equations :

15.

i)

N2 + H2

NH3

ii)

Fe + H2O

Fe3O4 + H2

iii)

Cu + O2

CuO

?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, % i)

czkseksizksisu

ii)

izksisukWy

iii)

izksihu

1+1+1 = 3

Draw the structural formulae for the following compounds :

17.

i)

Bromopropane

ii)

Propanol

iii)

Propene

¼a½ 2 Ω] 3 Ω] rFkk 6 Ω ds rhu izfrjks/kdksa dks fdl izdkj la;ksftr djsaxs fd 1½ +1½ =3 la;kstu dk dqy izfrjks/k ¼i½ 4 Ω ¼ii½ 1 Ω gks \ 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 What is electrical generator ? Write its principle. Draw a labelled diagram of A.C. generator.

1+1+3= 5

18.

fn;s x;s fp= esa yo.k ds foy;u dh pkydrk dk iz;ksx fn[kk;k x;k gSA ¼1½] ¼2½] ¼3½] ¼4½ rFkk ¼5½ dk ukekadu dhft;s %

1+1+1+1+1=5

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 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 1

1 2

In the given diagram the experiment of conductivity of a salt solution is shown. 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. (b) Write the chemical equation for its reaction with ethanol to form compound Y. (c) How can we get compound X back from compound Y ? (d) Name the process and write the corresponding equation.

1+1+1+1+1=5

1 1 1 2

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 \ 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 \ ¼b½ ekuo esa cPps dk fyax fu/kkZj.k dSls gksrk gS \

2+3=5

¼a½ What is the function of Lymph in our body ? ¼b½ Draw a neat diagram of human heart and label the main parts.

2+3=5

Or ¼a½ Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics ? ¼b½ How is the sex of the child determined in human beings ?

3+2=5

3+2=5