Karnataka SSLC Question Paper 2021 Science for Hindi Medium

Question Booklet Serial No. : 16-

®æãàí¨Ü~ ÓÜíTæ :
Register Number :
±Ü£ÅPæ - 01 / Paper - 01
GÓ….GÓ….GÇ….Ô. ÊÜááS ±ÜÄàûæ – 2021
SSLC MAIN EXAMINATION – 2021
+ +
Subjects : MATHEMATICS + SCIENCE + SOCIAL SCIENCE
ÊÜáñÜᤠCíXÉÐ… ÊÜÞ«ÜÂÊÜá / Hindi and English Medium
CCE-RF / CCE-RR / CCE-PF / CCE-PR / NSR / NSPR
: 10-30 1-30 ] [ Time : 10-30 A.M. to 1-30 P.M.
: 40 + 40 + 40 = 120 ] [ Total No. of Questions : 40 + 40 + 40 = 120
: 40 + 40 + 40 = 120 ] [ Max. Marks : 40 + 40 + 40 = 120

TEAR HERE TO OPEN THE QUESTION BOOKLET
83-H/E — / SCIENCE
Instructions to the Students :
1.

Write your eleven digit Register Number on the Question Booklet as
allotted in the admission ticket in the space provided at the top right
corner of this front page.
2.

This Question Booklet has been sealed by reverse jacket. You have to cut
on the right side to open the Question Booklet at the time of
commencement of the examination. Check whether all the pages of the
Question Booklet are intact.
3. OMR
OMR Sheet will be provided subject-wise separately.
4.
Tear here

This set of Question Booklets consists of three core subjects and each
subject has separate Question Booklet.

1602 1 of 24

5. 40 120

(i) – 1 40

(ii) – 41 80

(iii) – 81 120

40 questions are provided against each subject. This set of Question
Booklets contains 120 questions in all.
(i) Mathematics – Question Numbers 1 to 40
(ii) Science – Question Numbers 41 to 80
(iii) Social Science – Question Numbers 81 to 120
6.

Each question carries one mark. Answering all the questions is
compulsory and each correct answer will be awarded one mark. There will
be no negative marking for wrong answers.
7.

a)

b) OMR

OMR

20 C OMR

C

20) A B C D

c) OMR

1602 2 of 24

During the examination,

a) Read the questions carefully.

b) Completely darken / shade the relevant circle against Question

Number in the OMR Sheet using blue / black ball point pen. Do not

try to alter the entry and not to do any stray marks on OMR Sheet.

Example : In the question booklet, if C is the correct answer for

Question No. 20, then in the OMR Sheet shade the option C using

blue / black ball point pen as follows.

Question No. 20) A B C D ( This is an example only )

c) Do not fold, tear, wrinkle or staple on the OMR Sheet.

8.

If more than one circle is shaded for a given question, such answer is

treated as wrong and no marks will be given.

9. OMR

Student and Room Invigilator should sign in the OMR Sheet in the space

provided.

1602 3 of 24

10. OMR

Candidate should return the subject-wise answered OMR Sheet to the

Room Invigilator before leaving the examination hall.

11.

Rough work can be done in the space provided at the end of the Question

Booklet.

12.

Calculators, Mobiles, Smart Watches and any other electronic equipment
are not allowed inside the examination hall.

1602 4 of 24

Subject : SCIENCE

OMR
40 × 1 = 40
Four choices are given for each of the following questions / incomplete
statements. Choose the correct answer among them and shade the correct
option in the OMR Answer Sheet given to you with a black / blue ball point
pen. 40 × 1 = 40

41.

(A) (B)

(C) (D)

The device that works on the principle of electromagnetic induction is

(A) electric generator (B) electric heater

(C) electric motor (D) electric fan

42. 30  6 9V

(A) 4A (B) 36 A
(C) 0.25 A (D) 0.6 A

1602 5 of 24

An electric lamp whose resistance is 30  and a conductor of 6 
resistance are connected in series to 9 V battery as shown in the figure.
The total current flowing in the circuit is

(A) 4A (B) 36 A

(C) 0.25 A (D) 0.6 A

43.

(A) (B)

(C) (D)

The inner wall of the solar cooker is painted black because this

(A) reflects light (B) converges solar radiations

(C) prevents from rusting (D) absorbs more heat

44.

(A) (B)

(C) (D)

The metal used in the filament of an electric bulb is

(A) manganese (B) tungsten

(C) nickel (D) chromium

1602 6 of 24

45.

(A) (B)

(C) (D)

A rectangular coil of copper wire is rotated in a magnetic field. The

direction of the induced current changes once in each

(A) two revolutions (B) one revolution

(C) half revolution (D) one-fourth revolution

46. + 0·50 m

(A) + 2·0 D (B) + 2·0 D

(C) – 2·0 D (D) – 2·0 D

The focal length of a lens is + 0.50 m. The power of the lens and type are

(A) + 2.0 D and convex lens (B) + 2.0 D and concave lens

(C) – 2.0 D and concave lens (D) – 2.0 D and convex lens

47.

(A) (B)

(C) (D)

A device used to change the resistance in the electric circuit is

(A) voltmeter (B) ammeter

(C) galvanometer (D) rheostat

1602 7 of 24

48.

(A) (B)

(C) (D)

The magnetic field lines inside a solenoid are in the form of parallel
straight lines. The reason for this is, the magnetic field inside the solenoid
is

(A) very high (B) uniform

(C) zero (D) produced by electric current

49. F1 O

(A)

(B)

(C)

(D)

The nature and the size of the image formed when an object is kept
between the principal focus F1 and optical centre O of a convex lens are

(A) virtual, erect and enlarged

(B) real, inverted and small size

(C) virtual, inverted and small size

(D) real, inverted and enlarged

1602 8 of 24

50.

(A) (B)

(C) (D)

The device that converts electrical energy into mechanical energy is

(A) electric generator (B) solar cell

(C) dry cell (D) electric motor

51. SI

(A) (B)

(C) (D)

„Ohm‟ is the SI unit of

(A) electric potential difference (B) resistance

(C) electric current (D) electric charge

52.

P 1·52

Q 1·44

R 2·42

S 1·33

(A) Q (B) P
(C) S (D) R

1602 9 of 24

Observe the following table :

Material medium Refractive index

P 1.52

Q 1.44

R 2.42

S 1.33

In which material medium the speed of light is very high ?

(A) Q (B) P

(C) S (D) R

53.

(A)

(B) éF_k

(C)

(D)

The source of energy in nuclear power reactor is

(A) nuclear fission reaction

(B) controlled nuclear fission chain reaction

(C) exothermic reaction

(D) nuclear fusion reaction

1602 10 of 24

54.

(A)

(B)

(C)

(D)

One property of a convex lens among the following is that, it

(A) diverges the light rays

(B) is thicker at the edges and thinner at the middle

(C) forms real and erect image

(D) is thinner at the edges and thicker at the middle

55.

(A) (B)

(C) (D)

A compound that reacts with both acids as well as bases to produce salts

and water is

(A) aluminium oxide (B) copper oxide

(C) iron oxide (D) sodium oxide

1602 11 of 24

56.

(A) (B)

(C) (D)

The structural formula of propanal is

(A) (B)

(C) (D)

57.

(A) (B)

(C) (D)

“Properties of elements are the periodic functions of their atomic number.”

This law was proposed by

(A) Newlands (B) Mendeleev

(C) Dobereiner (D) Henry Moseley

1602 12 of 24

58.

Fe + CuSO 4  FeSO 4 + Cu

Zn + FeSO 4  ZnSO 4 + Fe

(A) Zn > Fe > Cu (B) Fe > Cu > Zn

(C) Zn > Cu > Fe (D) Cu > Fe > Zn

Observe the following chemical reactions :

Fe + CuSO 4  FeSO 4 + Cu

Zn + FeSO 4  ZnSO 4 + Fe

The decreasing order of reactivity of the metals in the above reactions is

(A) Zn > Fe > Cu (B) Fe > Cu > Zn

(C) Zn > Cu > Fe (D) Cu > Fe > Zn

59. 20

(A) 2 (B) 8

(C) 4 (D) 3

The atomic number of an element is 20. In the modern periodic table, this

element belongs to the period

(A) 2 (B) 8

(C) 4 (D) 3

1602 13 of 24

60.

(A) 3 9 (B) 9 3

(C) 6 6 (D) 7 5

The numbers of single bonds and double bonds present respectively in the
structure of benzene molecule are

(A) 3 and 9 (B) 9 and 3

(C) 6 and 6 (D) 7 and 5

61.

(A) (B)

(C) (D)

The gas liberated when sodium carbonate reacts with dilute hydrochloric

acid is

(A) carbon dioxide (B) nitrogen dioxide

(C) hydrogen (D) chlorine

62.

(A) (B)

(C) (D)

The major component of compressed natural gas is

(A) butane (B) ethane

(C) methane (D) propane

1602 14 of 24

63.

(A) (B)

(C) (D)

The substance that converts blue litmus paper into red colour is

(A) lime water (B) pure water

(C) sodium hydroxide solution (D) gastric juice

64.

(A) (B)

(C) (D)

The process used to convert sulphide ores of metals into their oxides is

(A) calcination (B) roasting

(C) reduction (D) electrolysis

65.

(A) C6 H6 (B) C 6 H 14

(C) C 6 H 12 (D) C 6 H 10

The molecular formula of both hexene and cyclohexane is

(A) C6 H6 (B) C 6 H 14

(C) C 6 H 12 (D) C 6 H 10

1602 15 of 24

66. ( stinging hair )

(A) (B)

(C) (D)

An acid present in the stinging hair of nettle plant leaves is

(A) methanoic acid (B) oxalic acid

(C) citric acid (D) lactic acid

67.

(A) (B)

(C) (D)

The hormone that regulates carbohydrate, protein and fat metabolism in
the human body is

(A) Testosterone (B) Adrenaline

(C) Insulin (D) Thyroxin

68.

(A) (B)

(C) (D)

A pot that has growing seedling is kept in a dark room. A burning candle is
placed near it for a few days. The top part of the seedling bends towards
that burning candle. This is

(A) Chemotropism (B) Phototropism

(C) Geotropism (D) Hydrotropism

1602 16 of 24

69.

(A)

(B)

(C)

(D)

The correct statement with respect to biodegradable substances among the
following is that these substances

(A) undergo recycling naturally in the environment

(B) harm various organisms in the ecosystem

(C) increase the density of harmful chemicals in different trophic levels

(D) remain inert in the environment for a long time

70.

(A)

(B)

(C)

(D)

The correct sequence found in the process of sexual reproduction in a
flower is

(A) pollination, fertilization, seed, embryo

(B) seed, embryo, fertilization, pollination

(C) embryo, seed, pollination, fertilization

(D) pollination, fertilization, embryo, seed

1602 17 of 24

71.

(A) (B)

(C) (D)

Saving electricity by switching off unnecessary work of lights and fans is
an example of

(A) refuse (B) reduce

(C) reuse (D) repurpose

72. ( RRyy )
( rrYY ) F1

(A) (B)

(C) (D)

If a round green seeded pea plant [ RRyy ] is crossed with wrinkled yellow
seeded pea plant [ rrYY ], the seeds produced in F1 generation are

(A) round and green seeds (B) wrinkled and yellow seeds

(C) round and yellow seeds (D) wrinkled and green seeds
73.

(A)

(B)

(C)

(D)

Homologous organs

(A) have same structure and perform same function

(B) have same structure and perform different functions

(C) have different structures and perform same function

(D) have different structures and perform different functions

1602 18 of 24

74.

(A) (B)

(C) (D)

The blood vessels that carry blood from all parts of the human body to the
heart are

(A) arteries (B) capillaries

(C) pulmonary arteries (D) veins

75.

(A) (B)

(C) (D)

Plants can get rid of excess of water by this process

(A) Transpiration (B) Photosynthesis

(C) Respiration (D) Translocation

76.

(A) (B)

(C) (D)

The gap between two neurons is

(A) dendrite (B) axon

(C) synapse (D) cell body

1602 19 of 24

77.

(A) (B)

(C) (D)

The embryo gets nutrition from the mother‟s blood with the help of a

special part called

(A) Fallopian tube (B) Ovary

(C) Uterus (D) Placenta

78.

(A) (B)

(C) (D)

The common passage for both sperms and urine in human male

reproductive system is

(A) Urethra (B) Ureter

(C) Vas deferens (D) Urinary bladder

79.

(A)

(B)

(C)

(D)

1602 20 of 24

Which among the following is NOT the advantage of water harvesting

structures ?

(A) Recharge the ground water

(B) Water does not evaporate

(C) Provide breeding grounds for mosquitoes

(D) Provide moisture for vegetation

80.

(A) (B)

(C) (D)

The experiences of an individual during its lifetime cannot be passed on to

its progeny because they are

(A) inherited traits (B) acquired traits

(C) dominant traits (D) recessive traits

1602 21 of 24

( SPACE FOR ROUGH WORK )

1602 22 of 24

( SPACE FOR ROUGH WORK )

1602 23 of 24

1602 24 of 24