HBSE Class 10 Science Question Paper 2018 Set B

CLASS : 10th (Secondary) Code No. 3505
Series : Sec. M/2018
Roll No. SET : B

foKku
SCIENCE
(Physics, Chemistry and Life Science)
(Academic/Open)
[ fgUnh ,oa vaxzsth ek/;e ]
[ Hindi and English Medium ]
(Only for Fresh/Re-appear Candidates)

le; : 3 ?k.Vs ] [ iw.kk±d : 60
Time allowed : 3 hours ] [ Maximum Marks : 60

• d`i;k tk¡p dj ysa fd bl iz'u-i= esa eqfnzr iz'u 27 gSaA
Please make sure that the printed question paper are contains 27
questions.

• iz'u-i= esa nkfgus gkFk dh vksj fn;s x;s dksM uEcj rFkk lsV dks Nk= mÙkj-iqfLrdk ds eq[;-i`"B
ij fy[ksaA
The Code No. and Set on the right side of the question paper should be
written by the candidate on the front page of the answer-book.

• d`i;k iz'u dk mÙkj fy[kuk 'kq: djus ls igys] iz'u dk Øekad vo'; fy[ksAa
Before beginning to answer a question, its Serial Number must be written.

• mÙkj-iqfLrdk ds chp esa [kkyh iUuk / iUus u NksMsa+A
Don't leave blank page/pages in your answer-book.

3505/(Set : B) P. T. O.

(2) 3505/(Set : B)
• mÙkj-iqfLrdk ds vfrfjDr dksbZ vU; 'khV ugha feysxhA vr% vko';drkuqlkj gh fy[ksa vkSj fy[kk
mÙkj u dkVsaA
Except answer-book, no extra sheet will be given. Write to the point and do
not strike the written answer.

• ijh{kkFkhZ viuk jksy ua0 iz'u-i= ij vo'; fy[ksaA
Candidates must write their Roll Number on the question paper.

• d`i;k iz'uksa ds mÙkj nsus lss iwoZ ;g lqfuf'pr dj ysa fd iz'u-i= iw.kZ o lgh gS] ijh{kk ds
mijkUr bl lEcU/k esa dksbZ Hkh nkok Lohdkj ugha fd;k tk;sxkA
Before answering the question, ensure that you have been supplied the
correct and complete question paper, no claim in this regard, will be
entertained after examination.

lkekU; funsZ'k %
General Instructions :

(i) lHkh iz'u vfuok;Z gSaA
All questions are compulsory.

(ii) oLrqfu"B iz'uksa ds lgh fodYi fy[ksaA
Write the correct option in objective type questions.

(iii) nh?kZ mÙkj okys iz'uksa esa vkarfjd fodYi dk izko/kku gSA
Internal choice has been provided in long answer type questions.
(iv) izR;sd iz'u ds vad mlds lkeus n'kkZ;s x;s gSaA
Marks of each question are indicated against it.

[k.M – v
SECTION – A [ Marks : 20

3505/(Set : B)

(3) 3505/(Set : B)
¼HkkSfrd foKku½
foKku½
(Physics)

1. fdlh O;fDr ds us= ds fØLVyh; ysal dk /kqa/kyk gksuk] us= ds fdl jksx dks n'kkZrk gS \ 1
(A) eksfr;kfcan
(B) jaxkU/krk
(C) (A) rFkk (B) nksuksa
(D) buesa ls dksbZ ugha

The cloudiness or milky condition of the crystalline lens of a person
shows which defect of the eye :

(A) Cataract
(B) Colour Blindness

(C) Both (A) & (B)

(D) None of these

2. rkjksa ds fVefVekus dk eq[; dkj.k gS izdk'k dk % 1

(A) ijkorZu (B) viorZu
(C) izdh.kZu (D) buesa ls dksbZ ugha
Twinkling of stars is mainly due to :

(A) Reflection (B) Refraction
(C) Scattering (D) None of these

3. fuEu esa ls dkSu fo|qr 'kfDr dks ugha n'kkZrk gS \ 1

(A) P = VI

3505/(Set : B) P. T. O.

(4) 3505/(Set : B)
Q
(B) P =V
t

(C) P = I 2R

(D) P = I 2Rt

Which of the following do not represent electric power ?

(A) P = VI

Q
(B) P =V
t

(C) P = I 2R

(D) P = I 2Rt

4. fuEu esa ls dkSu ÅtkZ dk ijaijkxr òksr ugha gS \ 1

(A) tSo ek=k (B) lkSj ÅtkZ
(C) iou ÅtkZ (D) buesa ls dksbZ ugha

Which of the following is not a conventional source of energy ?

(A) Bio-mass (B) Solar energy

(C) Wind energy (D) None of these

5. thok'eh bZa/ku dh D;k gkfu;k¡ gSa \ la{ksi esa o.kZu dhft,A 2

What are the disadvantages of fossil fuel ? Explain in brief.

3505/(Set : B)

(5) 3505/(Set : B)
6. 400 W dk dksbZ fo|qr jsfÝtjsVj 10 ?kaVs izfrfnu pyk;k tkrk gSA 4.00 #i;s izfr fdyksokV

?kaVs dh nj ls bls 30 fnu pykus esa ÅtkZ dh ykxr dks ifjdfyr dhft,A 2

An electric refrigerator of power 400 W is allowed to run 10 hrs. per day.

What is the cost of energy to operate it for 30 days at Rs. 4.00 per kWh

?

7. vkius i;kZoj.k dks cpkus ds fy, rhu izdkj ds 'R' ds fo"k; esa rks vo'; lquk gksxk %
2

de mi;ksx (Reduce), iqu% pØ.k (Recycle) vkSj iqu% mi;ksx (Reuse)A ßiqu% pØ.kÞ dk
o.kZu foLrkj ls djsaA

You must have come across the three 'R's to save the environment :

Reduce, Recycle and Reuse. Explain Recycle in detail.

8. (a) dksbZ oLrq mÙky ysal ds eq[; Qksdl (F ) rFkk izdkf'kd dsanz (O) ds e/; fLFkr gSA ml
oLrq ds izfrfcac dh fLFkfr] lkbt+ rFkk izÑfr dks js[kkfp= ds }kjk n'kkZb,A 2
An object is placed at a position in between the main focus (F ) and
the optical centre(O) of a convex lens. Draw a ray diagram showing
the position, size and nature of the image formed.

(b) ysal dh {kerk D;k gksrh gS \ fdlh ysal dh ,d Mk;ksIVj (1D) {kerk dks ifjHkkf"kr
dhft,A 2

What is the power of a Lens ? Define one Dioptre (1D) power of a
lens.

3505/(Set : B) P. T. O.

(6) 3505/(Set : B)
9. ,d fo|qr eksVj ds fl)kar] lajpuk rFkk dk;Zfof/k dk foLr`r o.kZu dhft,A 6

Explain in detail, the principle, construction and working of an electric
motor.

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OR

(a) ¶ysfeax dk oke gLr fu;e D;k gS \ le>kb,A 2

What is Fleming's left hand rule ? Explain.

(b) oS|qr pqacdh; izsj.k ls vkidk D;k vfHkizk; gS \ pkyd esa izsfjr fo|qr /kkjk dh fn'kk
Kkr djus esa ¶ysfeax ds nf{k.k&gLr fu;e dk D;k mi;ksx gS \ le>kb,A 4
What do you mean by electromagnetic induction ? Explain the use
of Fleming's right hand rule in finding the direction of current
induced in the conductor.

[k.M – c
SECTION – B [ Marks : 19

¼jlk;u foKku½
(Chemistry)

10. rsy ,oa olk;qDr [kk| inkFkksZa dks ukbVªkstu ls izHkkfor D;ksa fd;k tkrk gS \ 1

(A) mudk vip;u jksdus ds fy,A
(B) mudk mip;u jksdus ds fy,A
(C) mudks dhVksa ls cpkus ds fy,A
(D) mudks pwgksa ls cpkus ds fy,A

3505/(Set : B)

(7) 3505/(Set : B)
Oil and fat containing food items are flushed with nitrogen. Why ?
(A) To prevent their reduction.

(B) To prevent their oxidation.

(C) To protect them from insects.

(D) To protect them from rodents.

11. NaHCO 3 dk izpfyr uke D;k gS \ 1

(A) ftIle (B) fojatd pw.kZ
(C) csfdax lksMk (D) /kksus dk lksMk

What is common name of NaHCO 3 ?

(A) Zypsum (B) Bleaching Powder

(C) Baking Soda (D) Washing Soda

12. fuEu esa ls fdl rRo esa nwljs dks'k esa igys dks'k ls nksxqus bysDVªkWu gSa \ 1

(A) vkWDlhtu (O) (B) ukbVªkstu (N)

(C) ¶yksjhu (F) (D) dkcZu (C)

Which of the following elements has twice as many electrons in its

second shell as in its first shell ?

(A) Oxygen (O) (B) Nitrogen (N)

3505/(Set : B) P. T. O.

(8) 3505/(Set : B)
(C) Fluorine (F) (D) Carbon (C)

13. mu fo;kstu vfHkfØ;kvksa ds ,d&,d lehdj.k fyf[k,] ftuesa Å"ek vkSj izdk'k ds :i esa
ÅtkZ iznku dh tkrh gSA 2

Write one equation each for decomposition reactions where energy is

supplied in the form of heat and light.

14. vEy dks ruqÑr djrs le; ;g D;ksa vuq'kaflr djrs gSa fd vEy dks ty esa feykuk pkfg,]
u fd ty dks vEy esa \ 2

While diluting an acid, why is it recommended that the acid should be

added to water and not water to the acid ?

15. fuEu esa ls lcls mfpr fodYi Nk¡fV, % 1
2
×4 = 2

(i) lcls T;knk la;kstdrk okyk rRo % Na, Mg, Al

(ii) lcls NksVk ijek.kq % Li, Na, K

(iii) lcls T;knk fo|qr _.kkRedrk okyk rRo % N, O, F

(iv) lcls de /kkfRod rRo % Li, Be, B
Identify the most appropriate option in the following :

(i) Element with maximum valency : Na, Mg, Al

3505/(Set : B)

(9) 3505/(Set : B)
(ii) Smallest atom : Li, Na, K

(iii) Most electronegative element : N, O, F

(iv) Least metallic element % Li, Be, B

16. (i) feJ /kkrq vkSj veyxe esa vUrj Li"V dhft,A 2

Differentiate between Alloy and Amalgam.

(ii) FkfeZV vfHkfØ;k D;k gS \ blds fy, jklk;fud lehdj.k nhft,A 2
What is thermite reaction ? Give chemical equation for it.

17. (i) lkcqu ,oa viektZdksa esa nks vUrj crkb,A 2

Give two differences between soaps and detergents.

(ii) letkrh; Js.kh vkSj izdk;kZRed lewg dks ifjHkkf"kr dhft,A 2

Define homologous series and functional group.

(iii) lar`Ir ,oa vlar`Ir gkbMªksdkcZu D;k gSa \ 2

What are saturated and unsaturated hydro-carbons ?

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OR

3505/(Set : B) P. T. O.

( 10 ) 3505/(Set : B)
dkcZu ds nks xq.k/keZ dkSu&ls gSa] ftuls dkcZu ;kSfxdksa dh ,d fo'kky la[;k cu tkrh gS \
o.kZu dhft,A 6

Explain two properties of carbon atom which lead to the huge number

of carbon compounds.

[k.M – l
SECTION – C [ Marks : 21

¼tho foKku½
(Life Science)

18. fuEufyf[kr esa ls dkSu&lk rhljs iks"kh Lrj ij vkrk gS \ 1

(A) izkFkfed miHkksDrk
(B) f}rh;d miHkksDrk
(C) r`rh;d miHkksDrk
(D) buesa ls dksbZ ugha

Which of the following come at third trophic level ?

(A) Primary consumers

(B) Secondary consumers

3505/(Set : B)

( 11 ) 3505/(Set : B)
(C) Tertiary consumers

(D) None of these

19. IySlsaVk fdlesa /kalk gksrk gS \ 1

(A) vaMokfgdk esa (B) ;ksfu esa
(C) xzhok esa (D) xHkkZ'k; esa
Placenta is embedded in :

(A) Oviduct (B) Vagina

(C) Cervix (D) Uterus

20. es#jTtk fdlls jf{kr gksrh gS \ 1

(A) diky (B) d'ks#dnaM
(C) ilyh (D) buesa ls dksbZ ugha
Spinal cord is protected by :

(A) Cranium (B) Vertebral column

(C) Ribs (D) None of these

21. lkbVksdkbfuu ds D;k dk;Z gSa \ 1

What are the functions of cytokinins ?

22. mPp ÅtkZ okys ijkcSaxuh fofdj.k vkWDlhtu v.kqvksa (O2) dks fo?kfVr dj ----------- ijek.kq
¼,sVe½ cukrs gSaA 1

3505/(Set : B) P. T. O.

( 12 ) 3505/(Set : B)
The higher energy UV radiations split apart some molecular oxygen into
……….. atom.

23. ijkx.k fdls dgrs gSa \ Loijkx.k vkSj ijijkx.k ds ckjs esa fyf[k,A 2

What is Pollination ? Write about self and cross pollination.

24. fdl tho esa [kaMu gksrk gS \ bl fof/k ds ckjs esa fyf[k,A 2

In which organism fragmentation occur ? Write about its process.

25. vk;ksMhu ;qDr ued dks iz;ksx djus dh lykg D;ksa nh tkrh gS \ voVqxzafFk }kjk òkfor gkWeksZu
ds dk;ksZa dks fyf[k,A 2

Why is the use of iodised salt advisable ? Write the functions of the

hormone secreted by thyroid gland.

26. ekuo esa cPps dk fyax fu/kkZj.k dSls gksrk gS \ 4

How is the sex of the child determined in human beings ?

27. (a) ,d iÙkh dh vuqizLFk dkV dk ukekafdr fp= cukb,A 3

Draw a well labelled diagram of cross-section of leaf.

3505/(Set : B)

( 13 ) 3505/(Set : B)
(b) xSlksa ds fofue; ds fy, ekuo&Qq¶Qql esa vf/kdre {ks=Qy dks dSls vfHkdfYir fd;k
gS \ 3

How are the lungs designed in human beings to maximize the area

for exchange of gases ?

vFkok
OR

ekuo ân; dh dk;Ziz.kkyh dk o.kZu dhft,A 6

Describe the working of human heart.

S

3505/(Set : B) P. T. O.