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narjmWu H moS >H mo Cma-nwpVH m Ho _wI-n>na Ad` {bIo&Candidates must write the Code on the

title page of the answer-book.

Series HRS H moS> Z. 31/2Code No.

amob Z.Roll No.

gH {bV narjm II

SUMMATIVE ASSESSMENT II{dkmZ

SCIENCE

{ZYm[aV g_` : 3KQ>o A{YH V_ AH : 90

Time allowed : 3 hours Maximum Marks : 90

H n`m OmM H a b| {H Bg Z-n _o _w{V n> 24h & Z-n _| Xm{hZo hmW H s Amoa {XE JE H moS >Z~a H mo N>m Cma-nwpVH m Ho _wI-n> na

{bI|& H n`m OmM H a b| {H Bg Z-n _| >42Z h & Hn`m Z H m Cma {bIZm ew H aZo gonhbo, Z H m H _mH Ad` {bI| & Bg Z-n H mo nT>Zo Ho {bE 15 {_ZQ >H m g_` {X`m J`m h & Z-n H m {dVaU

nydm _| 10.15~Oo {H m OmEJm & 10.15~Oo go 10.30~Oo VH N>m Ho db Z-n H monT>|Jo Ama Bg Ad{Y Ho XmamZ do Cma-nwpVH m na H moB Cma Zht {bI|Jo&

Please check that this question paper contains 24printed pages.

Code number given on the right hand side of the question paper should be

written on the title page of the answer-book by the candidate.

Please check that this question paper contains 42questions.

Please write down the Serial Number of the question beforeattempting it.

15 minutes time has been allotted to read this question paper. The

question paper will be distributed at 10.15 a.m. From 10.15 a.m. to

10.30 a.m., the students will read the question paper only and will not

write any answer on the answer-book during this period.

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gm_m` {ZX}e:

(i) Bg Z n H moXmo ^mJm|, ^mJ A Ama ^mJ ~, _| ~mQ>m J`m h& AmnH moXmoZm| ^mJm| HoZm| Ho Cma {bIZo h &

(ii) g^r Z A{Zdm` h &

(iii) AmnH mo ^mJ A Ama ^mJ ~ Ho g^r Zm| Ho Cma nWH -nWH ^mJ Ho AmYma na

{bIZoh &

(iv) ^mJ A Ho Z g`m 1go 3Ho Z EH -EH AH Ho h& BZHo Cma EH eX AWdmEH dm` _| X| &

(v) ^mJ A Ho Z g`m 4 go 7 Ho Z Xmo-Xmo AH m| Ho h & BZHo Cma bJ^J30eXm| _| XoZo h &

(vi) ^mJ A Ho Z g`m 8 go 19 Ho Z VrZ-VrZ AH m| Ho h & BZHo Cma bJ^J50eXm| _| XoZo h &

(vii) ^mJ A Ho Z g`m 20 go 24 Ho Z nmM-nmM AH m| Ho h & BZHo Cma bJ^J70eXm|_| XoZo h &

(viii) ^mJ ~ Ho Z g`m 25go 42Ho Z `moJm_H H meb na AmYm[aV ~h {dH nr Zh& `oH Z EH AH H m h & {XE JE Mma {dH nm| _| go AmnH mo Hodb EH g~goCn`w {dH n MwZZm h &

General Instructions :

(i) The question paper comprises of two Sections, A and B. You are toattempt both the sections.

(ii) Allquestions are compulsory.

(iii) All questions of Section A and all questions of Section B are to beattempted separately.

(iv) Question numbers 1to3in Section A are one-mark questions. These are tobe answered in one word or in one sentence.

(v) Question numbers4to 7in Section A are two-marks questions. These areto be answered in about 30 words each.

(vi) Question numbers 8 to 19in Section A are three-marks questions. Theseare to be answered in about 50 words each.

(vii) Question numbers 20 to 24 in Section A are five-marks questions. Theseare to be answered in about 70 words each.

(viii) Question numbers 25 to 42 in Section B are multiple choice questionsbased on practical skills. Each question is a one-mark question. You are

to select one most appropriate response out of the four provided to you.

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^mJ ASECTION A

1. Xmo Vdm| X AmaY,{OZHo BboQ>m{ZH {d`mg H_e: 2, 8, 2 Ama2, 8, 6h , Ho na_mUwH_mH {b{IE & 1Write the atomic numbers of two elements X and Y having electronic

configurations 2, 8, 2 and 2, 8, 6 respectively.

2. AmZwd{eH Vm `m h ? 1What is heredity ?

3. Eogr Xmo _Xm| H s gyMr ~ZmBE {OZH m AmgmZr go nwZ:MH U {H m Om gH Vm h, naVw h_Chom`:Hy S>>oXmZ _| \|H {X`m H aVo h & 1

List two items which can be easily recycled, but we generally throw themin the dust-bins.

4. b{JH OZZ H aZo dmbo Ordm|Ho OZH m| Ed CZH s gV{V`m| _| JwUgym|H s g`m g_mZhmoVr h &Bg H WZ H s nw{> H s{OE & 2The chromosomal number of the sexually producing parents and their

offspring is the same. Justify this statement.

5. AdVb XnU mam ~Zo {V{~~ H m o jU H aZo na dh Am^mgr, grYm Ama {~~ H sVwbZm _| Amd{YV nm`m J`m & {~~ H s XnU Ho gmnoj pW{V `m hmoZr Mm{hE ? AnZoCma H s nwpQ> Ho {bE {H aU AmaoI It{ME & 2The image formed by a concave mirror is observed to be virtual, erect and

larger than the object. Where should the position of the object be relative

to the mirror ? Draw ray diagram to justify your answer.

6. {H gr nm[aV _| AnKQ>H m|H m ApVd A{Zdm h & Bg H WZ H mo {g H aZo Ho {bE Xmo

H maUmo H s gyMr ~ZmBE & 2List two reasons to show that the existence of decomposers is essential in

an ecosystem.

7. Ob-g^a ~YZ V `m h ?Bg V _| ^mJ boZo dmbo g_wXm`m| H moBggo hmoZo dmbo Xmobm^m| H s gyMr ~ZmBE & 2What is watershed management system ? List two benefits derived by the

communities that participate in this system.

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8. {H gr Amhma mIbm _| D Om-dmh EH {X{eH hmoVm h &Bg H WZ H s nw{> H s{OE &nrS>H Zmer {H gr Amhma mIbm _| doe H aHo ~mX _| h_mao eara _| H go nhM OmVo h,g_PmBE & 3Energy flow in a food chain is unidirectional. Justify this statement.

Explain how the pesticides enter a food chain and subsequently get into

our body.

9. {ZZ{b{IV oH H aU _| And{VV {H aU H m nW XemZo Ho {bE {H aU AmaoIIt{ME : 3H me H s H moB Amn{VV {H aU {H gr AdVb b|g Ho(i) H m{eH Ho go JwOaVr h &(ii) _w` Aj Ho g_mVa h &(iii) _w` \ moH g H s Amoa {ZXo{eV h &Draw a ray diagram to show the path of the refracted ray in each of the

following cases :

A ray of light incident on a concave lens is

(i) passing through its optical centre.

(ii) parallel to its principal axis.

(iii) directed towards its principal focus.

10. H moB N>m {H gr XnU Ho Ywd go _mo_~mr H s dmbm H mo 12 cm Xar na aIH a CgHo{V{~~ H moXnU go 48 cmXar na pWV nX} na jo{nV H aZm MmhVm h & 3

(a) gwPmd Xr{OE {H Cgo {H g H ma H m XnU Cn`moJ H aZm Mm{hE &

(b) ~ZZo dmbo {V{~~ H m a{IH AmdYZ kmV H s{OE &

(c) {~~ go {V{~~ {H VZr Xar na h ?

(d) Bg H aU _| {V{~~ ~ZZm XemZo Ho {bE {H am AmaoI It{ME &

A student wants to project the image of a candle flame on a screen 48 cmin front of a mirror by keeping the flame at a distance of 12 cm from its

pole.

(a) Suggest the type of mirror he should use.

(b) Find the linear magnification of the image produced.

(c) How far is the image from its object ?

(d) Draw ray diagram to show the image formation in this case.

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11. doV H me H m EH nVbm {H aU-nwO PQ {M _| XemE AZwgma H mM Ho {H gr {_ABC_| go JwOaVm h &

Bg {M H moAnZr Cma nwpVH m na It{ME Ama nXo DE na {ZJV nwO Ogm {XImBXoJmCgH m nW ItMH a XemBE &

(i) ojU H s OmZo dmbr n[aKQ>Zm H m Zm_ Ama CgH m H maU {b{IE &(ii) BgHo A{V[a H {V _| Bg n[aKQ>Zm H m Amn Ama H hm ojU H aVo h ?

(iii) Bg ojU Ho AmYma na doV H me Ho Ad`dm| Ho ~mao _| Omo {ZH f {ZH mbm OmgH Vm hCgH m CoI H s{OE & 3

A narrow beam PQ of white light is passing through a glass prism ABC

as shown in the diagram.

Trace it on your answer sheet and show the path of the emergent beam

as observed on the screen DE.

(i) Write the name and cause of the phenomenon observed.

(ii) Where else in nature is this phenomenon observed ?

(iii) Based on this observation, state the conclusion which can be drawn

about the constituents of white light.

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12. H moB H m~m}pg{bH Ab (AmpdH -gy C2H4O2) CoaH Ho n _| {H gr Ab H sCnpW{V _| {H gr EoH mohmb go A{^{H m H aHo EH `m{JH X~ZmVm h & `h EoH mohmbjmar` KMnO4Ho gmW AmgrH aU Ho nMmV AbrH aU H aZo na dhr H m~mopg{bHAb C2H4O2~Zm XoVm h & (i) H m~m}pg{bH Ab, (ii) EoH mohmb VWm (iii) `m{JHXHo Zm_ Ama gaMZm {b{IE & 3

A carboxylic acid (molecular formula C2H4O2) reacts with an alcohol inthe presence of an acid catalyst to form a compound X. The alcohol on

oxidation with alkaline KMnO4followed by acidification gives the same

carboxylic acid C2H4O2. Write the name and structure of (i) carboxylic

acid, (ii) alcohol and (iii) the compound X.

13. H m~Z `m{JH m| H s g_OmVr` loUr go `m Vmn h ? (i) EoH sZm|, VWm (ii) EoH mBZm|H mgm_m` gy {b{IE & BZHo XmoH m~Z na_mUwAm| Ho ~rM Ho Am~YZ H mo XemZo Ho {bE

oH loUr Ho nhbo gX` H s gaMZm It{ME &3

What is meant by homologous series of carbon compounds ? Write the

general formula of (i) alkenes, and (ii) alkynes. Draw the structures of the

first member of each series to show the bonding between the two carbon

atoms.

14. {ZZ{b{IV gmaUr H m A``Z H s{OE {Og_| N> : Vdm| A, B, C, D, E Ama F H spW{V`m CZH s AmYw{ZH AmdV gmaUr _| pW{V`m| Ho AZwgma XemB JB h : 3

g_yh

AmdV 1 2 3 12 13 14 15 16 17 18

2 A B C

3 D E F

Cn w gmaUr Ho AmYma na {ZZ{b{IV Zm| HoCma Xr{OE :

(i) Cg Vd H m Zm_ {b{IE Omo Ho db ghg`moOr `m{JH ~ZmVm h &

(ii) Cg Vd H m Zm_ {b{IE {OgH s g`moOH Vm VrZ h Ama dh YmVw h &

(iii) Cg Vd H m Zm_ {b{IE {OgH s g`moOH Vm VrZ h Ama dh AYmVw h &

(iv) D Ama E_o go{H g Vd H m AmH ma ~S>m h Ama `m| ?

(v) Vd C Ama F{Og n[adma Ho gX` h CgH m gm_m` Zm_ `m h ?

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Study the following table in which positions of six elements A, B, C, D, E

and F are shown as they are in the modern periodic table :

Group

Period

1 2 3 12 13 14 15 16 17 18

2 A B C

3 D E F

On the basis of the above table, answer the following questions :

(i) Name the element which forms only covalent compounds.

(ii) Name the element which is a metal with valency three.

(iii) Name the element which is a non-metal with valency three.

(iv) Out of D and E, which is bigger in size and why ?

(v) Write the common name for the family to which the elements C

and F belong.

15. AmYw{ZH AmdV gmaUr _| "g_yh' go `m Vmn h ?{H gr g_yh _o D na go ZrMoOmZo na{ZZ{b{IV _| `m n[adVZ hmoVo h ? 3

(i) g`moOH Vm BboQ>mZm| H s g`m(ii) A`m{gV H moemo H s g`m

(iii) na_mUwAm| H m AmH ma(iv) Vdm| H s YmpdH H {V(v) g`moOH Vm BboQ>mZm| na {H m H aZo dmbm ^mdr Zm{^H s` AmdoeWhat is meant by group in the modern periodic table ? How do the

following change on moving from top to bottom in a group ?

(i) Number of valence electrons

(ii) Number of occupied shells

(iii) Size of atoms

(iv) Metallic character of elements

(v) Effective nuclear charge experienced by valence electrons

16. OVwAm| _| Ab{JH OZZ H s {H ht Xmo{d{Y`m| H s gyMr ~ZmBE & H m{`H dYZ H mo AmnOZZ H s {H g {d{Y _o aI|Jo Ama `m| ? H m{`H dYZ Ho Xmo bm^m| H s gyMr ~ZmBE & 3List any two modes of asexual reproduction in animals. Under which

mode of reproduction is vegetative propagation placed and why ? List two

advantages of vegetative propagation.

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17. _mZdm| mam Cn`moJ H s OmZo dmbr J {ZamoY H s Mma {d{Y`m|H s gyMr ~ZmBE &{ZZ{b{IV H WZ H s nw{> H s{OE : 3

J {ZamoYH {d{Y`m| Ho Cn`moJ H m n[adma Ho dm` Ed g_{ na `j ^md hmoVmh& List four methods of contraception used by humans.

Justify the following statement :

The use of contraceptive methods has a direct effect on the health andprosperity of a family.

18. `h _m g`moJ h {H H moB wJb Za {eew H mo AWdm _mXm {eew H mo O_ XoJm & qbJ-JwUgym| Ho gb`Z H moXemVo hE EH dmh AmaoI H s ghm`Vm go Bg H WZ H s nwpQ>H s{OE & 3It is a matter of chance whether a couple will give birth to a male childor a female child. Justify this statement with the help of a flow chartshowing the fusion of sex chromosomes.

19. Eogm hmogH Vm h {H H moB bjU demZwJV hmo OmE, naVw ` Zht hmo & EH Cn wCXmhaU H s ghm`Vm go Bg H WZ H s nwpQ> H s{OE & 3A trait may be inherited, but may not be expressed. Justify this

statement with the help of a suitable example.

20. (a) ZrMo {XE JE {M _| Zm_m{H V ^mJm| A, B, C Ama DHo Zm_ {b{IE :

(b) namJU `m h ?BgHo _hd H m CoI H s{OE &

(c) nwnm| _| {ZfoMZ {H g H ma hmoVm h ?nwn Ho Cg ^mJ H m Zm_ {b{IE Omo (i)~rO

_o| {dH {gV hmoVm h, VWm (ii){ZfoMZ Ho nMmV \ b _| {dH {gV hmoVm h & 5

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(a) Name the parts labelled as A, B, C and D in the diagram given below :

(b) What is pollination ? State its significance.

(c) How does fertilisation occur in flowers ? Name the parts of the

flower that develop into (i) seed, and (ii) fruit after fertilisation.

21. (a) _mZd _mXm OZZ-V Ho H mQ> ` H m AmaoI It{ME & Cg ^mJ H m Zm_mH ZH s{OE Ohm

(i) AS> {dH {gV hmoVo h &(ii) {ZfoMZ hmoVm h&(iii) {Zfo{MV AS> Amamo{nV hmoVm h &

(b) gjon _| CZ n[adVZm| H m dUZ H s{OE Omo J^me` _|Cg pW{V _o hmoVo h(i) O~ dh w_ZO JhU H aVm h &(ii) O~ w_ZO Zht ~ZVm & 5

(a) Draw a sectional view of human female reproductive system and

label the part where

(i) eggs develop.

(ii) fertilisation take place.

(iii) fertilised egg gets implanted.

(b) Describe, in brief, the changes the uterus undergoes

(i) to receive the zygote.

(ii) if zygote is not formed.

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22. (a) _mZd Zo Ho CZ ^mJm| H s gyMr ~ZmBE Omo Zo _| doe H aZo dmbo H me H s _mm

H mo {Z {V H aVoh & do Bg H m H mo {H g H ma H aVo h, g_PmBE & 12

1

(b) _mZd Zo _| ao{Q>Zm (pQ>nQ>b) H m H m {b{IE &2

1

(c) `m Amn OmZVo h {H H m{Z`m-AYVm H m CnMma ZoXmZ mam nm H m{Z`m Ho

`mamonU mam {H m Om gH Vm h ?h_| `moAma {H g H ma g_mO Ho gX`m|H mo _ w Ho nMmV ZoXmZ Ho {bE mogm{hV H aZo Ho {bE g_yhm| H mo gJ{R>VH aZm Mm{hE? 3

(a) List the parts of the human eye that control the amount of light

entering into it. Explain how they perform this function.

(b) Write the function of retina in human eye.

(c) Do you know that the corneal-impairment can be cured by

replacing the defective cornea with the cornea of the donated eye ?How and why should we organise groups to motivate the

community members to donate their eyes after death ?

23. Jmobr` b|gmo gog~{YV {ZZ{b{IV nXm| H s `m`m H s{OE : 5

(a) dH Vm-Ho

(b) _w` Aj

(c) H m{eH Ho (d) _w` \ moH g

20 cm \ moH g Xar Ho AdVb b|g go, {H gr 6 cmb~o {~~ H mo {H VZr Xar na aImOmE {H CgH m {V{~~ b|g go 15 cm Xar na ~Zo ? ~ZZodmbo {V{~~ H m AmH ma ^rkmV H s{OE &

Explain the following terms related to spherical lenses :

(a) Centres of curvature(b) Principal axis

(c) Optical centre

(d) Principal focus

At what distance from a concave lens of focal length 20 cm, should a 6 cm

tall object be placed so that it forms an image at 15 cm from the lens ?

Also determine the size of the image formed.

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24. Am`{ZH `m{JH ~ZmZo dmbo Vd AnZo ~mV_ H moe go BboQ>mZ m H aHo AWdm CZH mmg H aHo CH Q> Jg {d`mg m H aVo h & H maU g{hV g_PmBE {H H m~Z AnZo`m{JH mo Ho {Z_mU Ho g_` Bg T>J go CH Q> Jg {d`mg `m|m Zht H a gH Vm &Am`{ZH `m{JH m| _| ~ZZo dmbo Am~Y Ama H m~Z `m{JH m|_| ~Zo Am~Y Ho H mam| HoZm_ ^r {b{IE & gmW hr BgH m H maU ^r {b{IE {H H m~Z `m{JH gm_m`V:{dwV Ho

HwMmbH `m| hmoVo h & 5Elements forming ionic compounds attain noble gas configuration by

either gaining or losing electrons from their outermost shells. Give reason

to explain why carbon cannot attain noble gas configuration in this

manner to form its compounds. Name the type of bonds formed in ionic

compounds and in the compounds formed by carbon. Also give reason

why carbon compounds are generally poor conductors of electricity.

^mJ ~SECTION B

25. {H gr N>m Zo ZrMo {M _| XemE AZwgma H m{eH w{ X H m Cn`moJ H aHo gy H s[H aUm| H mo nXo Sna \ moH {gV {H m &

Bggo `h {ZH f{ZH mbm Om gH Vm h {H w{ X(ghr {dH n Mw{ZE) 1

(A) 10 cm \ moH g Xar H m Cmb b|g h &

(B) 20 cmdH Vm {`m H m Cmb b|g h &

(C) 20 cm \ moH g Xar H m Cmb b|g h &

(D) 20 cm \ moH g Xar H m AdVb XnU h &

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A student focussed the Sun rays using an optical device X on a screen Sas shown.

From this it may be concluded that the device X is a (select the correctoption)

(A) Convex lens of focal length 10 cm.

(B) Convex lens of radius of curvature 20 cm.

(C) Convex lens of focal length 20 cm.(D) Concave mirror of focal length 20 cm.

26. {H gr N>m Zo {XE JEF1 \ moH g Xar Ho Jmobr` Xnm Ho Cn`moJ mam {H gr ^br-^m{VXr XaW {~~ H m {V{~~ nXo na \ moH {gV {H m & BgHo nMmV {ejH Zo Cgo F2\ moH g Xar H m H moBA` XnU XoH a Cgr {~~ H mo Cgr nX} na \ moH {gV H aZo Ho {bEH hm & Cg N>m Zo `h nm`m {H Cgr {~~ H mo XgaoXnU go \ moH {gV H aZo Ho {bE CgoXnU H mo nX} go Xa hQ>mZm nS>m & CgHo Bg ojU go `h {ZH f{ZH mbm Om gH Vm h {HCgo {XE JE XmoZm| Jmobr` XnU (ghr {dH n Mw{ZE) 1(A) AdVb WoVWm F1< F2(B) AdVb WoVWm F1> F2(C) Cmb Wo VWm F1< F2(D) Cmb Wo VWm F1> F2A student has obtained an image of a well-illuminated distant object on ascreen to determine the focal length, F1of the given spherical mirror. Theteacher then gave him another mirror of focal length, F2and asked him

to obtain a focussed image of the same object on the same screen. Thestudent found that in order to focus the same object using the secondmirror, he has to move the mirror away from the screen. From thisobservation it may be concluded that both the spherical mirrors given tothe student were (select the correct option)

(A) Concave and F1< F2

(B) Concave and F1> F2

(C) Convex and F1< F2

(D) Convex and F1> F2

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27. H moB N>m 18 cm \ moH g Xar Ho Cmb bog H m Cn`moJ, b|g go {~~ H s {d{^ X [a`m| Ho{V{~~ ~ZZo H m A``Z H a ahm h & dh ojU H aVm h {H O~ dh {~~ H mob|g go27 cm Xar na aIVm h, Vmo {V{~~ bog Ho Xgar Amoa 54 cm Xar na ~ZVm h &{ZZ{b{IV AmaoI _| go CZ VrZ {H aUmo H mo Mw{ZE OmoH me Ho AndVZ Ho {Z`_m| H mnmbZ H aVr h Ama {OZH m Cn`moJ gJV {H aU AmaoI ItMZo Ho {bE [H m Om gH Vm

h&1

(A) 1, 2 Ama 4(B) 1, 3 Ama 5(C) 2, 4 Ama 5(D) 2, 3 Ama 4

A student is using a convex lens of focal length 18 cm to study the image

formation by it for the various positions of the object. He observes thatwhen he places the object at 27 cm, the location of the image is at 54 cm

on the other side of the lens. Identify from the following diagram the

three rays that are obeying the laws of refraction and may be used to

draw the corresponding ray diagram.

(A) 1, 2 and 4

(B) 1, 3 and 5

(C) 2, 4 and 5

(D) 2, 3 and 4

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28. H moB N>m 10 cm \ moH g Xar Ho Cmb b|g H m Cn`moJ H aHo {~~ H s {d{^ X[a`m|Ho

{bE Cmb b|g mam ~ZZodmbo {V{~~m| H m A``Z H a ahm h & {H gr EH ojU _| dh

`h nm gH Vm h {H O~ {~~ b|g go 20 cm Xar na aIm h, Vmo CgH m {V{~~ ~ZVm h

(ghr {dH n Mw{ZE) 1

(A) b|g Ho Xgar Amoa 20 cmXar na Ama `h g_mZ AmH ma H m, dmV{dH Ama grYmh &

(B) b|g Ho Xgar Amoa 40 cmXar na Ama `h Amd{YV, dmV{dH Ama CQ>m h &

(C) b|g HoXgar Amoa 20 cmXar na Ama `h g_mZ AmH ma H m, dmV{dH Ama CQ>mh &

(D) b|g Ho Xgar Amoa 20 cm Xar na Ama `h g_mZ AmH ma H m, Am^mgr Ama grYmh &

A student is using a convex lens of focal length 10 cm to study the image

formation by a convex lens for the various positions of the object. In one

of his observations, he may observe that when the object is placed at adistance of 20 cm from the lens, its image is formed at (select the correct

option)

(A) 20 cm on the other side of the lens and is of the same size, real and

erect.

(B) 40 cm on the other side of the lens and is magnified, real and

inverted.

(C) 20 cm on the other side of the lens and is of the same size, real and

inverted.

(D) 20 cm on the other side of the lens and is of the same size, virtual

and erect.

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29. {ZZ{b{IV AmaoI _| H mM Ho {_ go hmoH a JwOaZo dmbr {H gr H me {H aU H m nWXem`m J`m h :

Bg AmaoI _| AmnVZ H moU, {ZJV H moU VWm {dMbZ H moU H _e: {H Z Ajam| mam{Z {nV {H E JE h ?(ghr {dH n Mw{ZE) 1

(A) X, R AmaT(B) Y, Q AmaT

(C) X, Q AmaP

(D) Y, Q AmaP

In the following diagram, the path of a ray of light passing through a

glass prism is shown :

In this diagram the angle of incidence, the angle of emergence and the

angle of deviation respectively are (select the correct option) :

(A) X, R and T

(B) Y, Q and T

(C) X, Q and P

(D) Y, Q and P

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30. {ZZ{b{IV {Mmo H mo A``Z H s{OE {OZ_| Mma N>mm| P, Q, RAma S mam {H gr H mMHo {_ go hmoH a Jw OaZo dmbr H me {H aU Ho Ambo{IV nW XemE JE h :

ghr nW Ambo{IV H aZo dmbm N>m h 1

(A) P

(B) Q

(C) R

(D) S

Study the following diagrams in which the path of a ray of light passing

through a glass prism as traced by four students P, Q, R and S is shown :

The student who has traced the path correctly is

(A) P

(B) Q

(C) R

(D) S

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31. H moB N>m H mM H s Am`VmH ma {gr gohmoH a Jw OaZodmbr H me {H aU H m nW Ambo{IVH a Cg na ZrMo {XE AZwgma AmnVZ H moU i, AndVZ H moU r VWm {ZJV H moU e A{H VH aVm h &

BZ_| go ghr A{H V H moU h/h 1

(A) Hodb i(B) Hodb e(C) Hodb r(D) i Ama e

A student traces the path of a ray of light passing through a rectangular

glass slab and marks the angle of incidence i, angle of refraction r and

angle of emergence e, as shown.

The correctly marked angle(s) is/are

(A) i only

(B) e only

(C) r only

(D) i and e

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32. Mma {^ _mZ dmbo AmnVZ H moU H s H me {H aUm| H m, H mM H s Am`VmH ma {gr gohmoH a JwOaZona, nW H m AmboIZ H aZo Ho nMmV, {H gr N>m Zo AnZo ojUm| H mo gmaUrHo n _| {ZZ H ma Xem`m :

H _ g`m i r e

I 30 19 29

II 40 28 40

III 50 36 50

IV 60 40 59

BZ_| gdmom_ ojU h 1

(A) I

(B) II

(C) III

(D) IV

After tracing the path of a ray of light passing through a rectangular

glass slab for four different values of the angle of incidence, a student

reported his observations in tabular form as given below :

S. No. i r e

I 30 19 29

II 40 28 40

III 50 36 50

IV 60 40 59

The best observation is

(A) I

(B) II

(C) III

(D) IV

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33. {ZZ{b{IV {H gr [~rOnr ~rO Ho yU H s gaMZm HoAmaoI _| BgHo A{H V ^mJ I, IIAma III H_dma `mh ? 1

(A) mHwa, ~rOn, _ybmHw a

(B) mHwa, _ybmHw a, ~rOn

(C) ~rOn, mHw a, _ybmHwa

(D) _ybmHw a, mHw a, ~rOn

In the following diagram showing the structure of embryo of a dicot seed,what are the parts marked I, II and III sequentially ?

(A) Plumule, Cotyledon, Radicle

(B) Plumule, Radicle, Cotyledon

(C) Cotyledon, Plumule, Radicle

(D) Radicle, Plumule, Cotyledon

34. {ZZ{b{IV Xmo gpO`m| H m H mZ-gm OmoS>m g_OmV gaMZmAm|H m ghr {Z nU H aVm h ? 1(A) eH aH Xr Ama Amby(B) eH aHXr Ama Q>_mQ>a

(C) JmOa Ama Amby(D) _ybr Ama JmOaWhich of the following pairs of two vegetables represents the correct

homologous structures ?

(A) Sweet potato and potato

(B) Sweet potato and tomato

(C) Carrot and potato

(D) Radish and carrot

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35. {ZZ{b{IV H WZm| H m A``Z H s{OE :I. njr Ho nI Ama M_JmXS> Ho nI g_OmV AJ h &II. njr Ho nI Ama H sQ>m| Ho nI nmV[aV AJnmX h &III. njr Ho nI Ama H sQ>m| Ho nI g_d{m AJ h &IV. njr Ho nI Ama KmoS>o Ho AJnmX g_OmV AJ h&

BZ_| ghr H WZ h 1(A) I AmaII (B) II AmaIII(C) III AmaIV (D) I AmaIVStudy the following statements :

I. Wings of birds and wings of bats are homologous organs.

II. Wings of birds and wings of insects are modified forelimbs.

III. Wings of birds and wings of insects are analogous organs.

IV. Wings of birds and forelimbs of horse are homologous organs.The correct statements are

(A) I and II (B) II and III

(C) III and IV (D) I and IV

36. O~ Amn `rQ> _| _wHw bZ Ho {d{^ MaUm| H mo XemVr hB bmBS> H m A``Z H aVo h, VmoCg g_` Amn {ZZ{b{IV MaUm| H m ojU H aVoh :I. _wHwb OZH H m` go nWH hmo ahm h Ama Z`r `pQ> _| {dH {gV hmo ahm h&

II. _wHwb H m` {dH {gV hmoVr h Ama Cggo A` {eew _wHw b H m CXJ_ hmoVm h &III. OZH H mo{eH m H s H m` go{H gr ^r {Xem _| _wHw b ~mha AmVm h &IV. Bg H ma o EH H mbmoZr (_S>b) ~Zm boVo h &Cn w MaUm| H m ghr H_ h 1(A) II, I, III, IV (B) II, III, I, IV

(C) III, II, I, IV (D) III, I, II, IV

When you study a slide showing different stages of budding in yeast, youobserve the following stages :

I. The bud may get separated from the parent body and develop intoa new individual.

II. The body of the bud develops and gives rise to another baby bud.

III. A bud comes out in any direction from the body of the parent cell.

IV. Thus they may form a colony.

The proper sequence of the above stages is

(A) II, I, III, IV (B) II, III, I, IV

(C) III, II, I, IV (D) III, I, II, IV

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37. {H gr N>m H mo A_r~m _| [IS>Z Ho {d{^ MaUm| H mo XemZo dmbr V`ma bmBS> H moAnZo g w gy_Xeu _| \ moH {gV H aZm h& BgHo {bE Cgo {OZ g^d MaUmo H m nmbZH aZm h do A`dpWV H_ _| ZrMo {XE JE h :

I. gy_Xeu Ho S>m`m\ m_ Ama XnU H mo Bg H ma g_m`mo{OV H s{OE {H bmBS> H mo

Xr H aZo Ho {bE n`m H me doe H a gHo &II. _M (Q>oO) na bmBS> H mogmdYmZrnydH bJmBE &

III. gy_Xeu H mo Ce{ na g_m`mo{OV H aHo \ moH {gV H s{OE &

IV. gy_Xeu H mo {ZZ e{ na g_m`mo{OV H aHo \ moH {gV H s{OE &

gy_Xer_| bmBS> Ho ojU Ho {bE Cn w MaUm| H m ghr H _ h 1

(A) I, II, IV, III

(B) II, I, IV, III

(C) II, IV, I, III

(D) I, IV, II, III

A student has to focus his compound microscope to observe a prepared

slide showing different stages of binary fission inAmoeba. The steps he is

likely to follow are listed below in a haphazard manner :

I. Adjust the diaphragm and the mirror of the microscope so that

sufficient light may enter to illuminate the slide.

II. Fix the slide on the stage carefully.

III. Adjust the microscope to high power and focus.

IV. Adjust the microscope to low power and focus.

The correct sequence of the above steps to observe the slide under the

microscope is

(A) I, II, IV, III

(B) II, I, IV, III

(C) II, IV, I, III

(D) I, IV, II, III

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38. {H gr ~Vr _| `moJ H aZo Ho {bE Amd`H H R>moa Ob CnbY Zht h & naVw Hy b H s`moJembm _| {ZZ{b{IV bdU CnbY h :

1. gmo{S>`_ g\o Q>

2. H pg`_ g\o Q

3. _Zr{e`_ bmoamBS>

4. gmo{S>`_ bmoamBS>

5. Hpg`_ bmoamBS>

6. nmoQ>{e`_ g\oQ>

`moJ Ho {bE H R>moa Ob m H aZo Ho {bE Ob _| Cn w bdUm| _| go {H ho Kmobm OmgH Vm h ? 1

(A) 2, 3

Ama5

(B) 1, 2 Ama 5

(C) 1, 2, 4 Ama 6

(D) Hodb 3 Ama 5

In a locality, hard water, required for an experiment, is not available.

However, the following salts are available in the school laboratory :

1. Sodium sulphate

2. Calcium sulphate

3. Magnesium chloride

4. Sodium chloride

5. Calcium chloride

6. Potassium sulphate

Which of the above salts may be dissolved in water to obtain hard water

for the experiment ?

(A) 2, 3 and 5

(B) 1, 2 and 5

(C) 1, 2, 4 and 6

(D) 3 and 5 only

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39. H moB N>m EH ewH naIZbr _| bJ^J 2 mL EWoZmBH Ab boH a Cg_| EH MwQ>H sgmo{S>`_ hmBS>moOZ H m~moZoQ> {_bmVm h & BgHo nMmVdh {ZZ{b{IV o jU ZmoQ> H aVmh :I. VwaV hr ~wX~wXmhQ> Ho gmW H moBaJhrZ Ama JYhrZ Jg {ZH bVr h &II. `h Jg MyZoHo nmZr _| JwOmao OmZo na Cgo X{Y`m H a XoVr h &

III. ObVr {N>nQ>r H moBg Jg Ho {ZH Q> bmZo na `h Jg {d\ moQ> HogmW ObVr h &IV. O~ ObVr {N>nQ>r H mo Bg Jg Ho {ZH Q> bmVo h Vmo dh {N>nQ>r ~wP OmVr h &

BZ_| ghr ojU h 1(A) I, II AmaIII(B) II, III AmaIV(C) III, IV AmaI(D) I, II AmaIVA student takes about 2 mL ethanoic acid in a dry test tube and adds a

pinch of sodium hydrogen carbonate to it. He reports the following

observations :

I. Immediately a colourless and odourless gas evolves with a brisk

effervescence.

II. The gas turns lime water milky when passed through it.

III. The gas burns with an explosion when a burning splinter is

brought near it.

IV. The gas extinguishes the burning splinter that is brought near it.

The correct observations are

(A) I, II and III

(B) II, III and IV

(C) III, IV and I

(D) I, II and IV

40. EWoZmBH Ab Ho JwUY_mo H m A``Z H aZo Ho {bE EH `moJ _| H moB N>m EH ewHnaIZbr _| bJ^J 3 mLEWoZmBH Ab boVm h & dh Bg naIZbr _| BVZr hr _mm _| AmgwV Ob {_bmH a, naIZbr H mo^br-^m{V {hbmVm h & Hw N> g_` nMmV ojU H aZona dh N>m nmEJm {H 1(A) naIZbr _| EH H mobmBS> ~Z J`m h &(B) EWoZmBH Ab Ob _| AmgmZr go Kwb J`m h &(C) {db`Z hH m ZmaJr hmo J`m h &(D) EWoZmBH Ab H s gVh Ho D na Ob Va ahm h &

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In an experiment to study the properties of ethanoic acid, a student takes

about 3 mL of ethanoic acid in a dry test tube. He adds an equal amount

of distilled water to it and shakes the test tube well. After some time he

is likely to observe that

(A) a colloid is formed in the test tube.

(B) the ethanoic acid dissolves readily in water.

(C) the solution becomes light orange.

(D) water floats over the surface of ethanoic acid.

41. h_o gm~wZrH aU A{^{H m H m A``Z H aZo Ho {bE 20% Obr` gmo{S>`_ hmBS>mgmBS>{db`Z Mm{hE & O~ h_ R>mog gmo{S>`_ hmBS>mgmBS> H s ~moVb H m T> Z ImobVo h, Vmoh_ Bgo {H g d n _|nmVo h ? 1(A) aJhrZ nmaXeu _{UH m (~rS>)(B) N>moQ>r doV _{UH m (~rS>)

(C) doV Jw{Q>H mE/nn{S>`m(D) doV _hrZ MyUWe need 20% aqueous solution of sodium hydroxide for the study of

saponification reaction. When we open the lid of the bottle containing

solid sodium hydroxide we observe it in which form ?

(A) Colourless transparent beads

(B) Small white beads

(C) White pellets/flakes

(D) Fine white powder

42. gm~wZrH aU A{^{H m H m A``Z H aVo g_` H moB N>m A{^{H m {_lU H m Vmn _mnVmhAma gmW hr dh Zrbo/bmb {bQ>_g n mam Cg {_lU H s H {V ^r kmV H aVm h&CgHo ojUm| Ho AmYma na ghr {ZH f `m hmoJm ? 1(A) A{^{H m D _mjonr hAma A{^{H m {_lU Abr` h &(B) A{^{H m D _memofr hAma A{^{H m {_lU Abr` h &(C) A{^{H m D _memofr hAma A{^{H m {_lU jmar` h &

(D) A{^{H m D _mjonr h Ama A{^{H m {_lU jmar` h &While studying saponification reaction, a student measures thetemperature of the reaction mixture and also finds its nature using

blue/red litmus paper. On the basis of his observations the correct

conclusion would be

(A) the reaction is exothermic and the reaction mixture is acidic.

(B) the reaction is endothermic and the reaction mixture is acidic.

(C) the reaction is endothermic and the reaction mixture is basic.

(D) the reaction is exothermic and the reaction mixture is basic