Uttarakhand Board Class 10 Question Paper 2022 for Science

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'Time:3Hoursl I Max. Marks : 8O

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( ii) s-dm cr{b ftrA fr?rd 3i6 Tsb squ awft r}dt
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zs ri so ftF qr< st6 b eq{ frt

Instructaon:
(i) There are in all 30 questions in this question paper. All questions are
compulsory.
(ii) Marks allocated to every question are indicated against it.
(iii) Question No. 1 is multiple choice type question. Question f.ios. 2 to 6 are
of one mark each. Question Nos. 7 to 15 are of two marks each.
Question Nos. 16 to 24 are of three marks each. Question Nos. 25 to
30 are of four marks each.

1. {s esc b ed6 luo-s b rf,{ iiqr< fr-o-s frd rr} *l rrfr Bare:rr$ sal gfuor ii
ftRr$- 1x6=6
Four options are given in each part of this question. Write the correct answer in
your answer book-
(6) tr6 f+o+c dT f, ft-drs 6i ftflr os ttr' *r rq ft-cqq 6T pH qrc €q?rd; 6tfl-
A solution turns red litmus to blue. Its pH-value is likely to be-
(i) 1 (ii) 4
(iii) 7 (iv) 10
I1l I P.T.O.

(s) ft-{fr-6 qf 6T xTqrufr'o qx d-
The chemical formula of Bleaching powder is-
(i) CaCo. (ii) CaOCl,
(iii) Ca(oH), (iv) CaO

1rr1 frdfd t c"6rcT 6] qrd t-
The speed of light in vacuum is-
(i) 3x 108 m/s (ii) 3 x 1010 m/s

(iii) 331 m/s (iv) 2 x 108 m/s

( tl) crqsild b fu* t * -d, cr$fiffiT$g, d-d dEr g-dl' *frr t s{t{ ?16 frqr +fr
t-
(') afilrorrqC (ii) b-{o'd
qiiiy mgffifficrii (iv) aRaa-q-ot
The breakdown of Pyruvate to give carbon-dioxide, water and energy takes
place in-
(i) cytopiasm (ii) nucleus
(iii) mitochondria (iv) chloroplast
(-$) ftga efd-ilei 6r s.r. qrr6 t-
(i) ofrq (ii) udh<
(iii) drd (iv) 3irq-fi-d<
The S.I. unit of electric resistance is-
(i) Ohm (ii) Ampere
(iii) Volt (iv) Ohm-metre
( u) frq it * htn fi A-fl $,.pi t oTri dre q{rffi frBqq t gefr 6i $eilr c-o-rc qrfi *-
(i) In$Aq (ii)
(iii) aiiilt{ "EAH.{
(iv) a'dfiqT
Which of the following gas shields the surface of earth from Ultraviolet
radiations fronr the sun-
(i) Fluorine (ii) Nitrogen
(iii) Ozone (iv) Ammonia
233 (HOr) t2l

2 Efu€nqq3rFrfuToruoseresq*mt 1

Give an example of double displacement reaction.

3 u-6 nt&q afu d a-o,er hsr zs tfi. tr ss-d sto-s {* @r +,t? 1

The radius of curvature of a spherical mirror is 25 cm. What will be its focal
length?

rniftttemdHtdrgfuriiorqrdds#&ur 1

Mention any two methods of contraception.

5 *g<-drTabWiu-6-qytdcftdaddiTff o-<fiil 1

Why don't two magnetic,field lines intersect each other?

6 *q ffi fr?n 3t$d ffiq qarefr 6'r tr6-r'6 rcre<uT *But 1

Give one example each of biodegradable and non-biodegradable substances.

7 rmrffi 3iF tRs a1df, b qrer srFlfrqT 6l sfi-o-{ur frR*d mn {sb a} rqqh fr
d-drFql 2
Write an equation to show the reaction of Plaster of Paris with water and give its
two uses also.

B. fuaqtqrqk6q+d{sil61trEftHdtsu- 1+1=2
Balance the following chemical equations-
(tD) Fe+HrO-+Fe3O4+Hz (1!I) NaOH+H2SO4-+NarSOorHrO

9 ls-qrrrluT azn qr-q-rmq ti srfr{ ee dffi,tt 2
Differentiate between Self-pollination and Cross-pollination.

What is the role of saliva in. the digestion of food?

11. (6) srrffiftD6rqrqftAc-Adfr€iitf sdd?nqft'smqurt6ragqdrrdTXt 1

Write the name of tissue which transport water and minerals in plants.
(q) oTfrsritBeisqdb-d-dfu*arravrf-gur 1

Show binary fission in Amoeba only by figure.

233(Hor) t31 .[P.r.o.

. a) fugd d-id\ i[ qssr: 6ow, 24OV deII 40w' 24ov 3ift-d t r rct t fu-s-6l sftrtt1
3{ftr6
12

dlltz wnidrBri |
2

and 4OW 240V respectively'
There are two electric bulbs marked 6OW, 24OV
Which one of them has higher resistance? Calculate'
1

13. (6) 3iIq6Ifrqqffirt?
What is Ohm's Law?

tqi qdFirr 6r dleluT-d{fr frqq fr@
1
I

State Fleming's right-hand rule'

2
14. etDM b 3Iq-d-dq b Fqq ftR*&t
Write laws of refraction of light'

ls. 6t aq E?i 6<I stdq 6I srsioT aqj 6-{iT EIIdE? ot$ tir ortq ftftr$t
2

any two reasons'
Why should we conserye forests and wildlife? Write

16 dl eal x n'qT y & wuru; orio FEIYI: 12 aelr 17 dl
17 respectively'
The two elements x and y have atomic nos' 12 and
(.F) x der v d [email protected]"o {r+t ft@t
1

y'
Write the electronic configuration of x and
(c) x aefi v sra-d qrR4 d o-d fuia *l
1

periodic table?
Where the elements x and y are placed in
(n) {i aEit t ot+ en-g aer att :+urg da 1

Which is metal and which is non-metal in these elements?

3[eEr (oR)

qRfi eit-+frwfi 3rrod sRfi tdaitd q{RlTfr ga-+ dBul
a
3rTqtr-6 3n-d-d

compareandContrastthearrangementofelementsinMendeleev'sPeriodic
Table and the Modern Periodic Table'

233 (HOr) t4l

I

17. (6) sd$dl$ sfltitTt3ncffi ergi& te}<dra-q.Cg<ir+cr6-+rTEt
2

electron dot structure
What do you understand by covalent bonds? Give
for methane.

tsl s{rqft6dFrdit6Trmii6raeii*drt?
I

points?
Why do ionic compounds have high melting

18. (6) EdU$3l€ngoIrar-scorAfu siloctbdrqq{coe}fr tl 1

Give an example of a non-mental which is a liquid
at room temperature'
(q) ${qsff dffiI$s eT frA & d $El€iff ffii6r sdrrq *Bul 2

amphoteric oxides'
What are amphoteric oxides? Give two examples of

1e. 3rdFr6 sqq fi odem dFro s-+q b mr mn+ f;l ss{Tr{El 3

Whataretheadvantagesofsexualreproductionoverasexualreproduction?
Explain,

2e. q|Td s,.Tfi ii7 dil Hrs a E-@fu* e-cr{a d?Ir gst Fr<frRra
t{rtt d'1aeltf,d-
lVz*11/z=3
and label the
Draw a neat and clean diagram of Human excretory system
following Pafts in it-
(i) trffi (ii) {iditrft (iii) {flq-q
Ureter Urinary bladder
KidneY

3[sr4r (oR)
qrrii 61 dclfsa-
'qr{d E6q' 6I Ets 6l-c Evo e-tr{e a?Ir gs-t FrqftRq-d
Ll/z+ l1/z=3

Drawaneatandcleansectionalviewof'HumanHeart'andshowthefollowing
parts in it-
(i) c-dur$ (ii) drd S{rfr< (iii) qrdfttrq
Right atrium Left ventricle
Aorta
e-fto-{ur ftRE-At z
21. (6) s-6lcr{sd$t mr tr rorcr €s&sq sbqr 6I {rsrqFrd
What is Photosynthesis? Write chemical equation of Photosynthesis
process.

233 (HOr) tsl I P.r.o.

(s') t-*rsq mr ta rr;r6q m ot$ E-6 ord frfutr
1

What are Enzymes? Write any one function of Enzyme.

zz. 'frga qtcr' 51qrqifu-d 3{rtq q-{o.-{ Esb fu6FT aqn ordERT 6} sq-flrf,dr 3
Explain the principle and workihg of ,Electric Motor, by drawing its labelled
diag ram.

3T?tdr (oR)

tr6 ud b der c{ sv aw 500 mA sift-a tr srd dHs - 1+1+1=3
A torch bulb is rated 5V and 500 mA. Calculate_
(6) d6 # crfu
Power of bulb
(q) sd6rsfrtq
Resistance of bulb
(n) 2 Eidr smt qr dcr 6Rr svgm rsf
Energy consumed by bulb when it is lighted for 2 hours

23' 4 tft ms a-q. 2! efr. st6-s Eft Erd r-ra rte t so tfi , d qft w 16 d r dts
anr
d-{iddsfrfr€dfufr, rgftaurrmr*sndHr 3
An object 4 cm in rength is praced at a distance of 30 cm, from the
convex rens
of focal length 20 cm. Find the position, nature and size of the image formed
by
the lens.

24. qrktrq t 3{rc dqr Hq-fli da fsb Uw u-rot or aof-q dfrd, 3
What do you mean by Ecosystem? Describe its major components.

2s. (6i d-o u++ aeigm'srq q<t?fr 61ir{q).fri t FTfid-d aii fr-qr aror tl 2
why the oir and fat containing food items are frushed with nitrogen?

,qi 3qffift5qq 3rF{Bqr dn rerr<q sFo errwger 2
Describe Neutralisation reaction with example.

SIeriII (oR)

(6) 3nqfr-d3TradvtRfr bcercaflTdi3qfurda-catbilcftfrT+t
1

write the name of erements present in first period of modern periodic tabre.
233 (HOr) t6I

(rs) 6i-da b A 3{T{5di b itq ftfuEr I

Write the name of two allotropes of carbon.
(rr) SBqq errg 6i fr'# b a-d it Sfr6< aEit Rcr drdr d? 1

Why is Sodium metal kept immersed in Kerosene oil?
(q) ErBqil *ut er *l 1

What is the Reactivity Series?

26. (o) aqraldrt:=rd(b-{dqrqrqk6s+o.-rrrfrRr})- 2
What happens when (write only chemical equation)-

(i) Ei6 d $Eqq alqfmEs B-dqq b erprr{ 6{t dr
' Zinc is heated with Sodium hydroxide solution.
(ii) dBqq drf,oitiftd (dBrr rirfl) d rrtc fu'qr Hrdr *r
Sodium bicarbonate (Baking Soda) is heated.
(s) tdtos3{fi{Bqrtslqffitqqflifia uordreRuTtorrrcstEtt 2
What do you understand by Redox reaction? Explain with an example.
27. @l qnqitd-d6TfiTfr€rf{oTHa}erta z
How is the sex of child determined in human beings? .

(s) fi.u{.u. rftffiormr+rg61q5at?HtrdBsr 2
What is the importance of DNA copying in reproduction? Clarify.

za. tga rfttruoar t mr srF{elq t? ffi
qtrg b r arerg aur n ffi 5 mr 6l cftrtter
4 o tI $S q-drpJ b ffi
3r<r dR 6T cfrtq ffir 6hn, ffi tr ! mn M zn ta
4
What is meant by electrical resistivity? A wire of a given material having length L
and area of cross-section A nas a resistance of 4 C). What would be the
resistance of another wire of the same material having length and area of
cross-section 2A7
I
SHersr (oR)

zo, :o aefi eo il +{ stdQqdjt d fr -s c-6R ddrfr rd fuqr srq fr {fu H o.1 6.m yfri€r
(i) 4c2 (ii) 1od? 3Trds{6 qqa f,} gE 3{,lts strd dqkdr 4
How can three resistors of resistances 2e, 3f) and 6C) be connected to give a
total resistance of (i) 4e (ii) 1O? Show with diagram giving
necessary calculation.
233 (Hor) 17 1 [ P.r.o.

29" (6) dis fi srq-dl6l qe udq sl crr6 ftfuul 1

Write the formula and SI unit of power of lens.

(rE) 's-dt'b€b-aororqbfliidtt? 1

Why 'danger' signals are red in colour?

(r) pq, stkrsl a{ut dm ftffi a.q 6T efrkq diil dalti b frE fu-{uT 3Trtq d-{Eq
----a-
Jdt(l)- 2

(i) ag, a{ur b qa tel a $t6s (D b $-d dl
i"l -q, "fq b #r b-< tcl apn st6-{ (F) b frq dl
Draw ray diagram to show the image formation of an object by a
concave mirror, when the-
(i) object is in between pole (P) and focus (F) of the mirror'
(ii) object is in between centre of curvature (C) and focus (F) of the
m irror.

30. (6) q+ dq e-{d b mr anr de vrgWt 2

What are the advantages to built big dams? Explain'

(is) qqiq{ur 6} d-fl-i b frE ffitaR e6R b 'n' or qIfrd{s e1frul 2

Mention the name of any four'R'to save the environment'
seltlr (oR)
(6) Ert 3{qt <ig.r€rS b ercuTruo (fri-owf iin t) 3trcirrr al1@} :+rosq-oiti tr 2
Why do we need to use our resources carefully?
tl
(s) rirn Hu.r$ frrcr ffir qd fr-s uq qR€{ Efil 2

What is Ganga Action Plan? In which year it was launched?

233 (HOr) t8l