Set(1)
Grade: Ten FM: 75
Subject: Science Time:
2:15 hrs.
Candidates
are required to give their answers according to the given instruction.
Attempt
all the questions:
Group "A"15×1=15
1. Write short answer the
questions.
c) Write an equation to show nuclear fusion .a) What is universal gravitational constant?
ljZjJofkL u'?Tjfsif{0f cr/ eg]sf] s] xf] <
b) State Pascal's law. kf:snsf] lgod n]Vg'xf];\ .
Go'lSno/
ˆo'hgsf] ;lds/0f n]Vg'xf];\ .
d) What is meant by accommodation of eye?
cfFvfsf]
;dfof]hg eGgfn] s] a'lemG5 <
e) Define 1 unit of electricity. Ps o'lg6 wf/fljw'tsf] kl/efiff n]Vg'xf];\ .
f) What is the relationship between size of atoms and reactivity in case of non-metals?k/df0f'x?sf] cfsf/ / /f;folgs ;ls|otfsflarcwft'x?df s:tf] ;DaGw x'G5 <
g) Write an example of endothermic reaction.
tfkzf];sk|ltls|ofsf]
Pp6fpbfx/0f lbg'xf];\ .
h) Write down the structural formula of ethane and butene.Oy]g / Ao'6Lgsf] ;+/rgfTds ;'q n]Vg'xf];\ .
i) Write any two adverse effects of chemical pollution.
/f;folgs
k|b'if0fsf] b'O{ j6f gs/fTds c;/ n]Vg'xf];\ .
j) What is goiter? unufF8 eg]sf] s] xf] <
k) What is chromosomal disorder?qmf]df]hf]dn
l8::c8{/ eg]sf] s] xf] <
l) What type of asexual reproduction takes place in hydra and tapeworm?xfO8«f / 6]kjd{df s:tf] s:tf] k|sf/sf] cd}y'lgsk|hgg\ x'G5 <
m) Write the functions of
pericardial fluid.
k]l/sfl8{on
ˆn'8sf] sfo{ n]Vg'xf];\ .
n) What is mutation?Do'6];g eg]sf] s] xf]<
o) What is ozone depletion? cf]hf]g Iflos/0f eg]sf] s] xf] <
Group
"B" 13×2=26
2. Government of Nepal gives
the subsidy in solar equipments. Why?g]kfn ;/sf/n] ;f}o{ phf{sf] pks/0fdf ;x'lnotlbPsf] 5 .
lsg<
3. An egg sinks in pure water
but floats in saturated solution of salt. Why?z'b\b kfgLdf cG8f 8'Ag] / g'gkfgLsf] ;Gq[Kt 3f]ndf
cG8f plqg'sf] sf/0f pNn]v ug'{xf];\ .
b. Calculate the number of secondary coil.6fG;kmd{/sf] ;]s]G8/L kmGsfsf] ;ª\VofkTtfnufpg'xf];\ .
5. 10 bulbs of 40 watt each and
2 heaters of 1200 watt each are used for two hours daily. Find the units of
electricity consumed in 30 days.^) jf6sf !)cf]6faNa / !@)) jf6sf @ cf]6f lx6/x? k|To]slbg @
3G6fsf b/n] k|of]u ul/Psf] 5 . #) lbgdfvktx'g] o'lg6 kTtfnufpg'xf];\ .
6. Give the electronic
configuration of magnesium in terms of sub shell. Write its block and period on
the basis of your electronic configuration.;a;]nsf] cfwf/dfDofUg]l;odsf] On]S6f«]g laGof; ug'{xf];\
. o;sf] cfwf/dfDofUg]l;odsf] Ans /
lkl/o8 kQfnufpg'xf];\ .
7. Define homologous series.
Write the homologous series of alkanes. xf]df]nf]u; l;l/hsf]
kl/efiff n]Vg'xf];\ . cNs]gsf] xf]df]nf]u; l;l/h n]Vg'xf];\ .
8. Write any two differences
between thermo-plastic and thermo-setting plastics.ydf]{–Knfl:6s / ydf]{;]l6ª Knfl:6s
larsf] s'g} @ j6f km/s n]Vg'xf];\ .
9. Why is catalyst used in
chemical reaction? Write two examples of catalyst./f;folgs k|ltls|ofdfpTk]|/ssf]
k|of]u lsgul/G5 <pTk]|/ssf] @ j6f pbfx/0fx? n]Vg'xf];\ .
10. Why hormones are called
chemical messengers? Write the name of hormones secreted by adrenal gland. xdf]{gnfO{ /f;folgs ;+jfbbftfklg
elgG5, lsg< Pl8«gn u|lGyn] pTkfbgug]{ xdf]{gsf] gfd n]Vg'xf];\ .
11. Write two differences
between layering and grafting.
n]ol/ª
/ u|flˆ6ª ljlwaLr @ j6f km/s n]Vg'xf];\ .
12. Write one-one function of queen bee and worker bee.
efn]
df}/L / sdL{df}/Lsf] !÷! j6fsfo{ n]Vg'xf];\ .
13. The normal blood pressure
of human being is 120/80 mm of Hg. What does it mean?Pp6f ;fwf/0f dflg;sf] An8 k]|;/
!@)÷*)mm of HgeGgfn] s] a'lemG5 <
14. Write any four objectives
of launching of artificial satellites into the space.cGtl/Ifdfs[lqdpku|xx?
k7fpg'sf] s'g} $ j6f p2]Zox? pNn]v ug'{xf];\ .
Group
"C"6×3=18
15. The mass of the Jupiter is
2×1027kg and its radius is 6.5×104km. What is the
acceleration due to gravity on the Jupiter? Also, calculate the weight ofa
person having the mass of 70kg on the Jupiter.olb
j[x:kltsf] lk08 2×107kg/
cw{Jof;6.5×104km5g\ eg] j[x:kltsf]
u'?Tjk|j]u slt x'G5 <70 kg lk08 ePsf]
dflg;sf] tf}n To; u|xdfkTtfnufpg'xf];\ .
16. Answer the following
questions on the basis of given table.
tn lbOPsf] tflnsfcg';f/ ;f]lwPsfk|Zgx?sf]
pTt/ n]Vg'xf];\ .
|
Substances |
Sp. heat capacity |
|
A |
2100 J/kg/0C |
|
B |
910 J/kg/0C |
|
C |
138kg/0C |
i) If A, B and C are taken in equal mass and heated by giving equal heat, which one of them gains the maximum temperature and why? olb ;dfg lk08 ePsfA, B / CnfO{ ;dfgtfklbFbfs'gkbfy{n] a9L tfkqmdk|fKt u5{ / lsg<
ii) Which one of them is suitable for cooling and heating purpose? Why?oLkbfy{x?dWo], s'gkbfy{ lr:ofpg / ttfpgpko'St x'G5 <lsg<
iii) If equal mass of A and B are taken at 800C and left to cool, which will be cooled faster and why?olb a/fa/ lk08 ePsf] A/ BnfO{ 800 C ;DdttfP/ lr:ofpbf, s'gkbfy{ rfF8} lrl:;G5 / lsg<
17. Write any two ores of Iron.
The external cover of aeroplane is made from aluminium instead of iron. Give
two reasons.
kmnfdsf]
@ cf]6fwfpx?sf] gfd n]Vg'xf];\ . xjfOhxfhsf] aflx/L cfj/0f kmnfdsf] ;6\6f
PNd'lgodaf6 agfOPsf] x'G5 . @ cf]6fsf/0f n]Vg'xf];\ .
18. Why magnesium hydroxide and
aluminium hydroxide are called antacids? Write the balanced chemical equation
for the formation of acidic salt by the reaction between strong acid and weak
base.DofUg]l;od xfO8f]cS;fO8 / PNd'lgod xfO8f]cS;fO8nfO{ PG6fl;8
elgG5 . lsg< s8f cDn / g/d Iff/sf] k|lts[ofaf6 aGg] cDnLo n+j0fsf] pbfx/0f
;Gt'lnt /f;folgs ;lds/0f¢f/f n]Vg'xf];\ .
19. What is vegetative
propagation? Give any two points to show the importances of vegetative
propagation.s[ltd k|hgg\ eg]sf] s] xf] < s[ltd k|hggsf] @ cf]6f
dxTTjpNn]v ug'{xf];\ .
20. Explain the present
scenario of air pollution in Kathmandu valley. Write any two control measures
of air pollution.sf7df8f}F pkTosfdfxfnsf] jfo' k|b"if0fsf]
cj:yfsf] af/]df j0f{g ug'{xf];\ . jfo' k|b"if0f lgoGq0f ug]{ @ cf]6f
pkfox? n]Vg'xf];\ .
Group
"D" 4×4=16
21. A convex lens has a focal
length of 3cm. If a pencil is placed twice of its focal length then, Pp6f
sGe]S; n]G;sf] s]Gb|Ls/0f b'/L 3cm 5 . olb s]Gb|Ls/0f
b'/Lsf] bf]Aa/ b'/Ldf Pp6f k]lG;n /flvPsf] 5 eg]M
i) Draw a clear ray diagram to show the formation of image of pencil.ls/0f /]vflrqlvr]/ k]lG;nsf] cfs[lt b]vfpg'xf];\ .
ii) Write the nature of image. cfs[ltsf] k|s[lt n]Vg'xf];\ .
iii) Calculate the
magnification of image.
cfs[ltsf] la:t[tLs/0f kTtfnufpg'xf];\ .
iv) What is the power of lens? n]G;sf] ;fdYo{ slt 5 <
22.Draw a neat and labeled
diagram showing laboratory preparation of gas which is found in deep well and
is acidic in nature. Also write the balanced chemical equation of chemical
reaction of that gas formed. What happens when this gas is passed through
slaked lime for a while?k|of]uzfnfdfulx/f] O{gf/df kfO{g] clDno
u'0f ePsf] UofF; agfpg] ljlwsf] ;kmfgfdª\lstlrqsf]g'{xf];\ . pStUofF; aGbfx'g]
/f;folgsk|lts[ofsf] ;Gt'lnt ;lds/0f klg n]Vg'xf];\ . pStUofF;nfO{ s]xL
a]/;Ddr'gkfgLdf k7fpFbf s] x'G5 <
23.If the monohybrid cross
between black male rabbit and white female rabbit takes place, all offspring of
F1 generation were black. Why were not white offspring seen in F1
generation? Show this process with the help of chart up to F2generation.
Also write genotypic and phenotypic ratio of black and white rabbit in the
second filial generation. sfnf] efn] v/fof] / ;]tf] kf]yL
v/fof]sf] lardfdgf]xfOla|8 s|; u/fpFbfklxnf] j+zdfsfnf v/fof]x? dfq b]lvPeg]
;]tf v/fof] b]vf k/]gg\ lsg< bf];|f] j+z;Ddsf] rf6{ agfO{ k|i6 kfg'{xf];\ .
pStj+zsf] lhgf]6fOk / lkmgf]6fOk cg'kftklgpNn]v ug'{xf];\ .
24.What is the time period of
Mesozoic and Cenozoic Eras? Write the chief animals developed in those
eras. Write any two importance of
fossils.d];f]hf]Os / ;]gf]hf]Os O/fsf] cjlwsltxf] <pSt
O/fdfljsl;td'Vohgfj/x?sf] gfd n]Vg'xf];\ . hLjfjz]ifsf] @ cf]6f dxTjpNn]v
ug'{xf];\ .
—
