Uttarakhand Board Class 10 Question Paper 2023 for Science

Uttarakhand Board
Question Paper
CLASS 10

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Roll No. No. of printed pages : 8

o33 23,3 (HGI!
20^23
ffiilrrT (*cirFrol
scrENcE (THEORY)
T[rrq,aquel twf6 :80
Time:3Hoursl I Max. Marks : 8O

ff{vr ' ii) Es qwT-qrr fr gm 30 rva f;l stff qqr sFrqrd dl
Directior:s: There are in all 30 questions in this question paper. All questions are
compuisory.
(ii) qs{i tg Mfrn 3i6 Frb s$q sifua dt
Marks alloted to the questions are mentioned against them.
(iii) s'd-s qri' d tffiEdo qtsA erur Hgfu sr< fitsut
Read each question carefully and answer to the point,
{iv) qsq dqr t egffiq qw tt $-s'qvt b q-+6 strs b rfl{ d Ex fuo-e.
t
k& w d t q& fr6ru $q+ rnigRf,-dT d ftRqut ssq sqr 2 e 16 Flfrrad
3-flflq qpq St
Question No. 1 is muitiple choice question. Four options are given in
answer of each part of this question. Write cori'ect option in your
answer book. Question No. 2 to 9 are definite answer type questions.
(v )ssT dwr 1 6r trSd sus scr sim mr *t ssq frlgT z * s iltr qir ilim b
t
qgq €t ir${ TiwT 1 0 1 5 crrF * t #i
3i6 b sqr fr t ss{ dEqi 1G 2s il6
*
3i6 b w-r frt sr{ sqr a4 30 crrn qK 3t6'& qs{ dt
Each part of question No. 1 carries one mark. Question No. 2 to 9
are of one rnark each. Question t\o. 1"0 to 15 are of two marks
each. Question No. L6 to 23 are of three marks each. Question No.
24 to 30 are of four marks each.
(vii SH sq{-w{ d sqq qi st$ frmro qfr d ?rpnE anftqq ss+itt3lt-dk6 fd-o.m
ffist
q"dm ftD-qT rrqT tt t-+ saqifr arildT sdr fr68 m.T fr rr<
There is no overall choice in this question pape[ howevel, an internal
choice has been provided in few questions. Attempt only one of the
given choices in such questions.

tlI I P.T.O.

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1 (6) Em ktrq{ fd mrc* o\ mm o< *oi d't sm fr-trqq 6-l pl-1-E'Il'HtiE-fr:
A solution turns blue litmus red. Its pl-l-value is li kely to be-
(i) 10 (ii) +A
(iii) 7 (iv) 74
(s) sfdgo' 3rtr ffir <rsrqFffi E'a *- 1

The chemical formula of Ethanoic acid
(i) HCOO H CH
=CH
O
(iii) cH3cooH .:
C. Fi-O H

(rr) ffifrra fr dt{ $t-q€rqT slffiFs dl I
I

Whiclr of the following is an amphote ric oxide?
(i) [rlaro lvlgO
(iii) Al2o3 SO,
(E) frqftfuafi * blq s1qrflr frfrq f;a '1

(i) sgfr,q Qflq{fulT
(iii) Essq ) ergCta;6f6
Which of the following is a plant
( ii) Thyroxin
(iv) Cytokinin

ts) rrFr?r +{ b Hs trm if ffi qE 6r ,66t-
(i) 6THqr
(iii) grrft
The human eye forms the image of an object at its-
(i) , Iris
(iii) ) Retina
(q) ftgd sftttr 6-T s.i. urr6 t- 1

(i) Et€ ( ii) 3rtq
(iii) fut (iv) 3irq-fr?x
The S.I. unit of electric resistance is-
(i) Volt Ohm
(iii) Ampere Ohm-meter
(s) sfi $?rntr drs dil stdffi (ft zo +fi tt Sffit 1

The focal length of a concave lens is 20 cm. Its power will be-
(i) +2D (ii) -2D
(iii) +5D (iv) -sD
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1

2
at normal

1

3

1

4. of Modern
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Periociic Table' 1

plants?
5.
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6.
1

7
1

6T qlq{ Rs
q: gr<T fuq s,lilr ta
B, {#fld to measure blood
Which instrument is used 1
ftnqr Hrdr tP
9. *{ +ffi q{Ii b fugwa' ftsffiorsqffr cell?
used to make solar
Which element is rnostlY 2
6T{*n-{16wT aqr tr ry
*-ryF
its one
wi.rlt is Hydrogenation? Write
t+ 1*2
11". Flqft{tue dmi ffiT IUPAC ti qTffiWT
':'
foiiowing comPou
Give the iUPAC name
(6',) cHa -c*t-i
tt
tt

(EI) CH3-e=C-H

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12. qffi ffiqr aqT ta skaff Bqr c, qktm. d mr qfu-, ]: 2
What is reflex action? What is the role of brain in rei:x acrion?

13. q?DHr qtq&qrr @T t? mFRT rirfrquT b fu qlur o,d BTqf; e.-l + ilq. 6{HT t? 2
What is Fhotosynthesis? Where do plant get rarv materials required for
photosynthesis?

14. q{-qfu fu'ffi oai & {nb frnwT b frs fus ron b dn 6T rqhr otti Z

What is Hypermetropia? What type of lens is used for correcting hypermetropia?

r.s.'MT$Tdmq'rord?lqsdfrEt Z

What is'Chipko Andolan'? Clarify,

L5 " (6) Bq srfi{mn €rrg m} ag e'FildrRfi 3rfi fr srETT Ernr d d} dlq fr ts Frdrre
*a1
Which gas is produced when dilute hydrochloric acid is added to a reactive
metal?
(g') BTrffio dffi 6T ffireFno ra dC drar *l 1

Why do ionic cornpounds have high boiling point?
(?T) 6r& fu dt 3rqsqt h il-q ftfrrSt 1

Write the name of two allotropes of carbon.
tT. d f,d| ,x,elx11 ,y' b v{Ttug ffii6 F-rI?t: 11 dgrf 17 fi_
Two elements 'x' &'y' have atomic numbers 3.1 & 17 respectively-
(6) 'x'Tlery'd5ffifr,-6*rdiTfrMl 1

Write the electronic configuration of 'x' &'yo.
t
{qs) f,ftf'x' Ererr 'y' 3ffi er<oft 6d frm f;l 1

Where in the periociic table, the elements 'x' &'y' are placed?
(?T) rlfrl 'x' dpfi 'y' bg q-6R b gfl-cNq (erqqq qT Tqrqql qil-Ate 1

Which type of ion (cation or anion) will be formed by the elernents ox'
&'y'?
SreIzIT/OR
kftfuadffifrfa-qTqkg{rsqTfiffi- 1+1+t=3
Give the electron-dot structure of the following compounds-
(6) C0, (g) HrS (rI) C2t-{5

r.8. EffiTqI tffiql ol ra-qT aen Bsmfrftr 6r wfq frfur g

Describe the structure and functioning of naphrons.

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19. qrdd s1rlq ea ar-i qrfr5 fre iliT{d ezrl rvl FrqftRro qiqi ftt avt@ !1iz*11/z=3
Dra,,, a near &clean diagram of human alimentarycanal and label the following
par:s n :-
(i) :--=-rq (ii) qpE (iii) qfl 3{1-c
S:cmach Liver Large intestine

srerdfi/oR
qE *- :rd*FC 6IC th-i wtrfte q-irf$ a?Ir Ef,t Frsrfrfu-a ?Trrrt61 3{b? #fra-
D-a , a neat &clean diagnam of the longltudinal section of a flower and labei the
fo, : , ng parts In it-
(il :.rr,m't$ (ii) Effimrq (iii) 3igRTq
-.rther Stigma Ovary

za. (o) qdffir or qrrrarcT kirq ftfu&t 1

State Fleming's Left-hand rule.
I td
d frqn gdt n der-r B fi m-srel' 50w, 240v astr 100w, dt irumT E:{h

fesC=--' : :-.- CLJ'.- :i

: r ?R rrd qRqE 3iTts c TM;l di=-
in the given circuit diagram, calc:late-
r)
(s) qfrqtl ffiT sfritrcI
SIr
L

The total resistance of circuit
qRqq C r"drBa gm frqF qxr 1

The tstal current following in circuit
4
G

3,2 a

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1?V
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,$qq b fuH r DrrTq sc-fr 3{ftIo. a fusor
zz. (tn) q?DTvr b €6-fi t mr 3Tnffirq ta =r
qs$oqdarta 2

whatismeantbyspectrumoflight?whichcolourofspectrumdeviatesthe
most and which the least?
(u) qffid ta a} Hrrnq Efu b fu 6< k6 aer Frffi kg + ti ffi
qA w dtt da t
with normal vision?
what is the far point and near point of the hurnan eye

23. qrRffi t snq aqT qrr$ra f;a qftia d 3{qqddiiai dqr qft551fr: 3

decomposers in the
what do you mean by Ecosystem? what is the role of
ecosYstem?
3[srdr/oR
q}ft ffi{ crdrssl
*fi m< ffir d? w 3{r6R FdT 6'I Tflf,{ur ffiu d?Ir Es-t frF]E.
and state the different
what are trophic levels? Give an example of a food chain
troPhic levels in it.

24. ffir drdl t rq (bcd rrflrqf{o sfto-wT ftMt- Lx4=4

Whathappenswhen(writeonlychemicalsquation)-
(6) ftto fr frqr rilBqq aEHrffiEs d gl* dtt
Zinc reacts with sodium hYdroxide'
(s) TiD-aqT ali q< trrq ffifrd d arft tt
Steam is Passed over red-hot iron'
(rr) up)+r$d' 3rffi dt cBffi qrffire b srel sfi{B-qT a} ETrft tt
Ethanoicacidreactswithsodiumbicarbonate.
(tr) frqq o1 sz: K trd qaq fuqr srdr tl
ZiPsum is heated uPto 373 K'
3[exq[/oR

(6) 3ilIIFffi sTEd Hl1fi iiffi 3Tffd aen frtd+ vgi il 1

Periodic Table?
How many periods and groups are there in the Modern
(q) E6 treq 'M; 3IIEd qRft b ffi
vffl ti tr gsb 3frmEs o.r q{ frRrde 1

Anelement,M,ispresentinthirdgroupoftheperiodictable.Writethe
formula of its oxide.

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(rr) rdlfr+f,{q gF{fffir ffi t? u-cn rdri{'I firhdt 2

What is neutralisation reaction? Give one example.

zs. (o,i dTtrH 3TFfu t mr Hkqd de FrHftTfud 3TF{bqT ii Jq-dfrrd dw sqrfra q-dref
d-dEA- 2
What is rneant by Redox reaction? Identify the substances that are oxidised
and reduced in the following reaction -
lvlno, + 4HCl -+ MnCl, + 2H.O + Cl,

(s i=qfl#q *oft mr te rcrr<rr eo.-< eq-g6l 2

,'/hat is homologous series? Explaih with an example"

26. (61 -q b sft{ C rs qfrr 6'r ilq ftTRrS dr g*q den $at-{q ffi vlfrd oqfi tt
1

',iame a gland in the human body that secretes both hormone as well as
€ lZyme.
(s) n;t$q TrD qffi b wqlT ol sora di * arfr ta 1

,','ly is the use of iodised salt advisable?
(rT) srlsrf, (TSII Hfi{q 3irn b 6-16 5ilfqir frRr}l 1

Write one example each of Homologous and Analogous organs.
r) uofrrh 6:; r:,frfi gq 6T E6-86 TffdwT ffir&t 1

Write one exarnole each of unisexual and bisexual flower.
27 . 6) gffiq-dq tgrSrr d?rT 59ffi{ t srnr ror sq-fli dl 2
What do you understand by Regeneration and Budding?
((q) q'qrrq aPtT frvfi'd sffr"{ HE fr1ffi I 2
Differentiate between Pollination and Fertilisation.
3[erEI/OR
(o) E6 ?itd6r 61frro.r 1;qfra) of *<ail d-{Tnd dan $$b mrd oi Euh btffi I 2
Drarv the structure of a neui'on and explain its function.

(s) q'rqE ti sd 6r ftir fr€tftul d* dm tl z
How is the sex of the child determined in human beings?

28" frgd F,Fr; mr ;TrqifuH 3nt{sdfr-At {s6l fu6Ffr aEn mrSBfu tr$flr$Et 4
Draw a labelled diagram of an Electric aenerator. Explain its principie and working.

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2s. (6) 5 fuft mS e-g zo t* d-im qqT Ert ms de b grr 3{e,T & errffird <6 rrfr tr
ds + a-q dt S so Aql d, rsb sft'rtry fr fufr, r-efr E"TT 3{trDK ara dffii
3

A 5 cm long object is placed perpendicular to the principal axis of a convex
lens of focal length 20 cm, The distance of the object from the lens is
30 cm. Find the position, nature and size of the image.

(q) qd(q b srq qd qrEF{ di rfrc d.or 8l 1

Why does the Sun appear reddish eanly in the morning?
3{srqrloR
(6) rdi r{cT d-s sr<r ftffi qrg 6i ffifon. frrfrit C rc-+ qr qftrRE b q* b fu
&-rf, fu-wT 3jTts 6{rf,d, .iffi 6$g - 2

Draw only ray diagrarn to show the formation of image of an object by a
convex lens when object is plaeed *
(i) frH b q,t-dffi F dsn r-6-rfu *< o b &-q drr
between focus F and optical centre O oi the lens.
(,i) dtsbFq2Fb#qdt
Delween F anci Z I *f ,.il* len:;.

(Er) mrm qrg t .s0 strd=Ii6 b 6iT C s&sr 6{sr tl otq ti rorqr d arc wr d,ta
1

drg C ry d am 3x1os *fiffors tr 2
Ught enters fiom air to glass which has a refractive index 1.50, What will
be the of light in glass? The speed of light in air is 3x108 ms 1.
f"PeeO

30. (6) orgqu-sa,ti 3ffiq q{fr 6l (rrr qrcr # shan q1? b 3rq&rcr b fru 61T t rdrp,
rrsar& fa 2
What is the importance of ozone layer in,the atmosphere? Which substances
are responsible for the depletion of ozone layer?

tsl q-qfu{ur-fr-, qri b frs 3ilq sTq* 3ilGdtii ot{ t qftrdq mr sd f;l z
What changes can yclu make in your habits to become more environment-
friendly?
*****

233 (HGr) t8I

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