SEBA Class 10 Sample Paper 2024 Science

CLASS 10
SAMPLE PAPER
2024

@aglasem

Total no. of printed pages : 20
Examination-2023-24
Class : X
Subject : General Science
Full marks : 100 Time: 3 hours
The figure in the nargin indicate full marks for each question
Section -A
Choose the correct answer: 1x45=45

1. What is the name of the process where fatty food becomes
rancid?

(a) Corrosion' ("*îe) b) Oxidation ( )
(c) Reduction (a4)
(d) Displacement reaction (afIA A )
2. Following observations were recorded when calcium oxide
reacts vigorously with water. Identify the incorrect
observations :

I. It is an endothermic reaction (coi Di G
Rfara)
II. Slaked lime is produced (Miaf FA teo A)
III. Quick lime is produced (Ca1 59 GeoaP)
IV. It isan exothermic reaction (RToI qÝi Bai A)

(a) Iand II (I *II) (b) Iand III (|$ III)
(c) Ill and IV (III EIV) (d) II and IV (Il *IV)

1 PT0.

3. Which one ofthe following is acidic in nature?

(a) Gastric juice (ga ) (b) Lime water (F )
(c) Bload (Cos)
(d) Sodium hydroxide solution (foxNRy'AR R)
4. Ifthe P" of a solution changes rom 3to 4, then the solution
is

(a) less acidic (* i ) (b) Base ( a )
(c) More acidic (af* aIA)
(a) Strong base ( r3)
5. Which of the following metal reacts vigorously with oxygen?

(a) Na (b) Fe (c) Cu (d) Ag
6. Which of the following elements is d metalloid?

(a) Na (by Al (c) Cl (d) B
7. In the fornmation of an ionic compound K,0, each atom of
K gives electron(s) to an atom of 0.

(a) 1 (b) 2 (c) 3 (d) 4
8. ZnOand Al,0, react with both acids as well as bases to
produce salts and water. These metal oxides are

(a) Basic (4¢3) (b) Acidic ( e )
(c) Amphoteric (Dsr) (d) Neutral

2 Contd.

9. Butanone is a four-carbon compound with the functional
group

(a) Caboxylic acid (®fsfrs ay)
(b) Aldehyde (afasaU)
(c) Ketone (#b) () Alcohol (PA)
10. Which isnot included in the same homologous series?

(a) .CH, (b) C,H, (c) C,H, (a) C,H,
M. Which among the following are unsaturated hydrocarbons?

) HC- CH, CH, - CH,
(Ö HC C=C- CH,
(m) HC - CH-CH, (iv) H,C -C= CH,

CH, CH,
a) iand iii (i ii) b) ii and iii (ii iii)
c) iiand iv (ii Siv) d) ifi and iv (iii as iv)
12. Whilestudying saponification reaction, a student finds its
nature using blue/red litmus paper. On the basis of his
observations the correct conclusion would be

(a) The reaction mixture is acidic

(b) The reaction mixture is neutral

PT.
3

Reaction mixture is basic
(c)

acidic and basic
(d) Reaction mixture is

of octaves was found to be
element, the law
13. Upto which
applicable?
(b) Calcium ( t )
(a) Oxygen (fT) (d) Potassium (DiII)
(c) Cobalt (*3)
and I are Dobereiner's traids. If atomic
14. Elements C1, Br
35.5u and ofI is 126.9 u, then the atomic mass
mass of CIis
of Br is

*I 126.9u, VT Br tn
q 9 ¢ 35.5u

(a) 81.2 (b) 162.4 (c) 91.4 (d) 45.7
processes is
15. The energy currency for most of the cellular

(a) ADP (b) AMP (c) ATP
16. Which of the following is more soluble in blood?

(a) Oxygen (fCE)
(b) Carbon-di-oxide (4-uyaU)

(c) Nitrogen (02a)
(d) Carbon monoxide (14-'ay)
4 Contd.

17. If salivary amylase is lacking in the saliva, which of the
following events in the mouth cavity will not take place
properly?

(a) Protiens breaking down into amino acids

(b) Starch breaking down into sugars

(c) Fats breaking down into fatty acids and glycerol

() Absorption of vitamins

18. The anther contains

(a) Sepals (p) (b) Ovules (f*)
(c) Carpel (at) (d) Pollen grains (RIt)
19. Match the column Iwith column II and select the
option

Column I(88 I) Column II(38 II)
) Budding (A) Rose ((aiti)
() Spore formation (B) Hydra (3}y)
(ü) Vegetative propagation (C) Rhizopus (23rE)

a) i)- B), ii)-C), ii)-A) b).i)-A), ii)-C), ii)-B)
c) i)-C),ii)-A),ii)-B) d) i)-B), ii)-A), iüi)-C)
PT.O.

20. Offspringformed as aresult of:sexual reproduction exhibit
more variations because

(a) Sexual reproduction is a lengthy process

the species
(b) Genetic material comes from two parents of

parents of different
(c) Genetic materials comes from two
species

(d) Genetic material comes from many parents

present in plants
21. The growth inhibiting hormone found to be

(a) Auxin (af) (b) Gibberellin (feitf)
(c) Cytokinin (5D' ) ) Abscisic acid

regulates the amount
22. Which hormone produced by pancreas
of sugar in the blood is

(a) Adrenelin (4fgafa) (b) Thyroxin (121)
(d) Testosterone (B3)
(c) Insulin (po)
6 Contd.

23. When we touch the leaves of the "touch-me-not" plant,
They begin to fold up and droop. How does the plant
communicate the information of touch?

(a) The plant uses electrical signals to transfer information
from the external enviorment to cells.

(b) The plant uses electrical-chemical signals to transfer
information from cell to cell

(C) The plant uses electrical-chemical signals to transfer
information from tissues to specialised cells.

(d) The plant uses electrical signals to transfer information
from cells to specialised tiss

24. How does electrical impulse travel in a neuron?

(a) Dendrite ’ axon ’ axonal end ’ cellbody

(b) Cell body ’ dendrite’ axon ’ axonal end
M2 ’
(c) Dendrite > Cell body ’ axon ’ axonal end

(d) Axonal end ’ axon ’ cell body ’ dendrite

7 PT.

25. Organs that have different origins but look the
perform the same function are same and

(a) Homologous organs ( )
(b) Analogous organs (Agfo WR)
(c) Rudimentary organs (9 fefo qR)
(d) Vestigial organs (yKR)
26. Which of the following chromosomes sets will determine the
male sex in a human infant?

(a) XX (b) XY (c) X0 (d) YO
27. Assertion :- Scientist performed a cross between a tall plant
and a dwarf plant; he obtained only taB plants in first
generation (F).

Reason :- Dwarf plant died.

(a) Both assertion and reason are true and reason is corect
explanation of the assertion

(b) Both assertion and reason are true but reason is not the

correct explanation of the assertion

8 Contd.

(c) Assertion is true but reason is false

(d) Assertion is false but reason is true

28. If the image formed by a miror for all positions of the object
placed in front of it is always diminished, crect and virtual,
state the type of the mirror

(a) Both concave and convex (gg y De)
(b) Plane ( )
(c) Concave (40G) (d) Convex (bg)
29. A student has focussed on the screen of distant building using
a convex lens. If he has selected a blue coloured building as
object, select from the following options the one which gives
the correct characteristics of the image formed on the screen.

(a) Virtual, erect, diminished and in green shade

(b) Rea, inverted, diminished and in violet shade

(c) Real, inverted, diminished and in blue shade

(d) Virtual, inverted, diminished and in blue shed

PT:0.

30. Why do, dentist use concave mirror to
examine a
cavity? small

(a) Toget diminished and real image

(b) To get enarged and real image

(c) To get enlarged and virtual image

(d) To get diminished and virtual image

31. The formation of rainbow

(a) Occurs in the same direction of the sun

(b) Occurs in the opposite direction of the sun

(c) does not depend on the direction of the sun

d) Occurs in all directions

32. The human eyecan focus objects at different distances by
adjusting the focal length of the eye lens. This is due to

(a) Presbyopia ( ( a )

(b) accomodation (®RIGA PAo)
(c) near-sightedness (00 yRaEo|)
(d) far-sightedness (1 yfedeo))
10 Contd.

13 Study the
33.
following diagrams
light passing in which the path of a
ray of
through a prism as traced by four
R and S is shown
students P, Q,

P)
(Q) (R) (S)
Which is correct?

(a) P (b) Q
34. S.I. unit of electric (c) R (d) s
charge is
(a) Coulomb (a4) (b) Volt (v)
(c) Watt (atÝ) (d) Joule (y)
35. An electric bulb is rated
220 Vand 100W. When it is
operated 110 Vthen the power
on
QDI CAg¢ Tjog 220 V s 100consumed W bRo
is
ta|

(a) 75 W (b) 25 W (c) 100 W (d) 50W
36. The magnetic field lines due to a
bar magnet are shown in
figure. Which is the correct figure.

11 PTO.

37. In right hand thumb rule, thumb represents.

(a) direction of magnetic field ($ HE )
(b) direction of force (e f)
(c) diretion of current( 7 a 7)
(d) direction of induced current (afre fATEA f)
38, The electric current produces the magnetic field, Thie
phenomenon was discovered by

(a) Faraday (FC5) (b) Ampere (af)
(c) Orsted ( 5 ) (d) Maxwell( a )
39. Among the following which is anon renewable source of
energy?

ass ( ))
(a) Wind energy (0 t ) (b) Biomass
(c) Natural gas (a1loF (E)
(d) Solar energy ( f)
40. In ahydroelectric power plant, more electrical power can be
generated if water falls from a greater height because

(a) its temperature increases ( GU gfa 3)
(b) larger amount of potential energy is converted into
kinetic energy
(c) the electricity content of water increases with height

(d) more water molecules dissociate into ions

12 Contd.

A1. What will happen if deer is missing in the food chain given
below?

Grass ’ deer -’ tiger ( i ’ )
(a) The population of tiger increases (0K RII I )
(b) Population of grass decreases ( RRT0 #A)
(c) tiger will start eating grass ( t E RA ITE R)
(d) Population of tiger decreases and population of grass
increases

42. Assertion :- Stratospheric ozone is good ozone

Reason :- Stratospheric ozone protects us from harmful
effects ofU.V rays like skin cancer

(a) Both assertion and reason are true and reason is the
correct explanation of assertion

(b) Both assertion and reason are true but reason is not the
correct explanation of assertion

(C) Assertion is true but reason is false

(d) Assertion is false but reason is true

13 PT0.

construction of1
of large
problemsassociated with the dams
43. The
are

crop fields are lost
(a) Large scale

Large ecosystemsare destroyed
(b)

Neither (a) nor (b) [(a) t* (b) 4DG AQN]
(c) (b) TCaIDI)
(a) and (b) [(a) wjF
(d) Both below select the ones that
statements given
44. Among the sustainable development:
correctly describe the concept of

to the
) Planned growth with minimum damage
environment

caused to
(i) Growth irrespective of the extent of damage
the environment

(m) Stopping all developmental work to conserve the
environment

(iv) Growth that is acceptable to all the stakeholders

(a) i) andiv) [i is iv] (b) ii) and ii) [ii i]
(c) ii) and iv) ii Siv] (d) iii only [Pa iii]
45. Pick the correct combination of terms which has no fossil
fuel

(a) Wind, ocean and coal (70, s${G)

14 Contd.

h) Kerosene, wind and tide
(tbH, TUE g$ catat)
(c) Wind, wood, sun (TR, et, y
(d) Petroleum, wood, sun ((a, t, )
Section - B
A6 Explain the following terms with the definition of oxygen gain
or loss. Explain with examples: 1+1=2

(a) Oxidation( ) (b) Reduction ( f )
A7. Take 3mL of sodium sulphate solution in a test tube. Take
3mL of barium chloride solution in another test tube. Mix the
two solutions and write the answers to the following. 1+1=2

(a) Write the observation of the above experiment

(b) Write the chemical equation of the above observation
and state the type of reaction

48. How does plaster of paris differ chemically from gypsum?
1+1=2
How can they be interchanged?

49. What is brine? What substance is produced when electricity

1+1-2
1spassed through this brine?

PI0.
15

50. What is a homologous series? Write the general formula for
alkanes and alkenes? 1+1=2

51. The atomic radii of the elements of second period are given
below:

Elements of B Be N Li C
period 2
atomic radii 88 111 66 74 152 77

(pm)
B Be N C

88 111 66 74 152 77

q (pm)
()) Arrange the elements in descending order of atomic
radius. 1+1=2

() Explain the reasons for the differences in atomic radii.

52. Whydo organisms need food? In what form and where do
the food substances that we consume get stored ultimately in
our body? 1+%+h=2

53. What is the functional unit of kidney? What is dialysis?
Mention the parts of excretory system. 1+1+1=3

16 Contd.

e Howdo muscle cells change their shape? 2

KE Dravwa flower in longitudinal section and mark the different
parts. 2

S6 Explain the relationship between evolution and classification. 2

Or/ we
Illustrate with example the factors of speciation?

57., A concave mirror forms a three times magnified real image
of an object placed at a distance of 10cm infront of it. Whát
is the position of the image?

Or/qeT
Name twO possible ways to form an enlarged image of an
object placed in front of a concave miror.

58. An object of height 20mm is placed perpendicular to the
principal axis of aconvex lens of focal length of 10cm. If the
distance between the lens and the object is 15 cm, then
determine the position and size of the image. Also find the
1+1+1=3
magnification of the image?

PT0:
17

Or/ge
Using a concave mirror with a focal length of 50cm, we want
toget an erect image of an object. What should be the range
of distance of the object from the mirror? What will be the
ture of the image? Is the image is larger or smaller than the
object?

59. Draw aray diagram for correcting hypermetropia or far2
sightedness defect.

Or/yeI
this idea of
Sunlight ismade up of seven colours. To prove
of white
Newton, explain the recombination ofthe spectrum
light by drawing a ray diagram.

Which willuse more energy- a 250W TVset running for 1
60.
for 10 minutes? 2
hour or a 1200W electric iron running

bfCG W¢ qbi 1200 W agfo 10 fAG SA?
Or/wI
6N be connected so that
How can three resistors of each
arrangement are
the equivalent resistances of the

i)92 and ii) 22

HeETCDA 04 i) 92 ii) 2 2 |

18
Contd.

Write Ohm's law. What is the S.I. unit of resistance. 1+1-2
61.

62. Explain the principle of electric generator with the help of a
labelled diagram.

Or/yeAI
uniform. Draw a
The magneticfield in a given solenoid is
diagram to represent it.

sources of energy which you would consider as
63. Name two
renewable sources of energy or exhanstible. Give
a non 1+1=2
reasons for your choice.

possibilities that non biodegradable
64. Write down any two
2
substances would affect environment.

reuse to protect environment. 2
65. Give example of reduce and

and MgO by the transfer of
66. Show the formation of NaO 1% + 1½=3
electrons.

Or/yAI

were taken and
B, Cand D
Samples of four metals A,
following solution one by one. The results
added to the 1+1+1=3
obtained have been tabulated as follows
PTO.
19

Metal Iron (II) Copper (II) Zinc Silver
sulphate sulphate sulphate nitrate
A No reaction Displacement
B Displacenment No reaction
No reaction Noreaction No reaction Displacement
D No reaction No reaction No reaction No reaction

A
B
C
D
Use the table above to answer the following questions about
metals A, B, Cand D.
g< oto0 IS A, B, C, D ù Ag4

(a) Which is the most reactive metal?

solution of
(b) What would you observe if B isadded to a
copper (I) sulphate?

order of their
(c) Arrange the metals A, B, Cand D in
decreasing reactivity.
A, B, C, D 9$ O fAAPS HGIaI
10

67. Internal assessment.

20
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