Karnataka SSLC Model Question Paper 2027 for Science (Paper 3, English Medium)

FOR KARNATAKA CLASS 10 PREPARATION

Karnataka SSLC Model
Question Paper 2027
for Science (Paper 3,
English Medium)
EXAM YEAR TYPE SUBJECT

Karnataka Class 10 2027 Sample Paper Science

Notes · Sample Papers · Previous Year Papers · Mock Tests

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ಕರ್ನಾಟಕ ಶನಲನ ಪರೀಕ್ಷೆ ಮತ್ತು ಮೌಲ್ಯನಿರ್ಾಯ ಮಂಡಲಿ
ಮಲೆೀಲ ಶ್ವರಂ, ಬೆಂಗಳೂರತ - 560 003

KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
Malleshwaram, Bengaluru - 560 003

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2026-27ರ ಎಸ್.ಎಸ್.ಎಲ್.ಸಿ. ಮನದರ ಪರಶೆೆ ಪತ್ರರಕೆ - 3
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S.S.L.C. MODEL QUESTION PAPER - 3: 2026-27

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ವಿಷಯ : ವಿಜ್ಞನನ

Subject: SCIENCE
(ಭೌತ್ ವಿಜ್ಞನನ, ರಸನಯನ ವಿಜ್ಞನನ ಮತ್ತು ಜೀವ ವಿಜ್ಞನನ / Physics, Chemistry and Biology)
(ಆಂಗಲ ಮನಧ್ಯಮ / English Medium)

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ವಿಷಯ ಸಂಕೆೀತ್: 83-E Subject Code : 83-E
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ಸಮಯ : 3 ಗಂಟೆ 15 ನಿಮಿಷಗಳು]
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ಗರಿಷಠ ಅಂಕಗಳು : 80] [Max. Marks: 80

General Instructions to the Candidate :
1. There are three parts in the question paper:

Part A: Physics, Part B: Chemistry, Part C Biology.
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2. This question paper consists of 38 questions.

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Follow the instructions given against the questions.

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a 4. Figures in the right hand margin indicate maximum marks for the

questions.

5. The maximum time to answer the paper is given at the top of the

question paper. It includes 15 minutes for reading the question

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paper.

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83-E 2

PART – A
( PHYSICS )
I. Four alternatives are given for each of the following questions / incomplete
statements. Choose the correct alternative and write the complete answer along
with its letter of alphabet. 2×1=2
1. In order to obtain an image smaller than the object in a concave mirror, the object
should be placed (F= principal focus, C= center of curvature, P=pole)
(A) Between C and F (B) Far from C
(C) Between P and F (D) At F
2. The work done in bringing a unit charge from one point to another through a
conductor is called
(A) Electric current (B) Electric potential difference
(C) Electric resistance (D) Electric power
II. Answer the following questions 2×1=2
3. Draw the symbols of the following components used in an electrical circuit
i) Wire crossing without joint.
ii) Rheostat.
4. “North Pole of a bar magnet repels when brought near one end of a current
carrying solenoid”. To which end of the battery that terminal of solenoid is
connected?

III. Answer the following questions 3×2=6
5. Observe and analyse the diagrams given below. Determine the type of the lens
“X” used for the correction of the depicted defect of vision here. Give suitable
reason for your answer.

i) Defect of vision ii) Correction to it
6. What is magnetic field? Magnetic field lines do not intersect each other. Why?
7. a) Define ‘Electric resistance’.
b) How is an Ammeter and a Voltmeter connected in an electric circuit?
OR
a) State Ohm’s Law.
b) List any two factors on which resistance of a conductor depends.

IV. Answer the following questions: 3×3=9
8. Draw the diagram to show the image formation when an object is placed between
the principal focus (F 1) and the optic centre (O) of a convex lens. Mention the
position and the nature of the image formed.

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s 9. What is the tyndall effect? Give two illustrations.
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OR
Stars do not twinkle. Why?
10. Explain the function of earthing wire.
OR
Write an activity that explains ‘a current carrying conductor experiences a force
when it is placed in a magnetic field’.

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V. Answer the following questions 2×4=8

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11. a) Write an activity that explains the refraction of light through a glass slab.

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b) State the laws of reflection.

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OR
a) What is Magnification? If the magnification of an image produced by the
lens is + 2, then mention the type of the lens.
b) The refractive index of medium “A” is lesser than the medium “B”. Then
which medium is optically denser? In which medium the speed of light is
more?
12. (a) A bread toaster rated 350 W is used for 15 hours a day. An electric iron
box rated 250 W is used for 5 hours a day. Calculate the total cost of using
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these appliances for 30 days if the cost for 1 kWh is ₹4?
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(b) In which method the resistor R1 and R2 could be connected so that the

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equivalent resistance of that electric circuit becomes low? What is the
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change in the value of current in the circuit by this type of connection?

PART – B
( CHEMISTRY )
VI. Four alternatives are given for each of the following questions / incomplete
statements. Choose the correct alternative and write the complete answer along
with its letter of alphabet. 3×1=3

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13. The acid present in the stinging hair of nettle plant leaves is

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(A) Methanoic acid (B) Oxalic acid

c. o (C) Citric acid (D)
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Lactic acid
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g chemical equation that
Zinc metal is added to the solution obtained by the chemical reaction between

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iron nail and the copper sulphate solution. A correct
a represents the reaction between that solution and zinc among the following is:
(A) Zn + CuSO4 → ZnSO4 + Cu
(B) Zn + FeSO4 → ZnSO4 + Fe
(C) Cu + ZnSO4 → CuSO4 + Zn
(D) Fe + ZnSO4 → FeSO4 + Zn
15. An unsaturated compound that has triple bond between carbon atom is
(A) Methane (B) Ethane

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(C) Ethene (D) Ethyne

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83-E 4

VII. Answer the following questions : 3x1=3
16. Silver ornaments kept open to the air lose their lustre gradually. Why?
17. What is thermite reaction?
18. Write the electron dot structure of methane.
VIII. Answer the following questions: 3x2=6
19. Observe the following chemical reactions.
i) 1 M sodium hydroxide is reacting with 1M hydrochloric acid.
ii) 1M magnesium hydroxide is reacting with 1M sulphuric acid.
Determine the molecular formula and the nature of the salts obtained in both of
the chemical reactions.
20. Write two differences between calcination and roasting.
OR
Hydrogen gas is not evolved when a metal reacts with nitric acid. Why? Explain.
21. Write the molecular and structural formulae of the third member of a
homologous series that has -COOH as a functional group.

IX. Answer the following questions : 3x3=9
22. Write the Balanced equations for the following chemical reactions.
i) Combustion of natural gas
ii) Reaction of potassium metal with water.
iii) Nitrogen gas reacts with Hydrogen gas.
OR
The reaction of barium chloride with sodium sulphate solution is an example for
what type of chemical reaction? Give reason for your answer? Write the balanced
chemical equation for this reaction.

23. Draw the diagram to show the reaction of zinc granules with dilute sulphuric acid
and testing hydrogen gas by burning. Label the following parts.
i) Zinc granules.
ii) Delivery tube.

24. Explain the formation of the ionic bond between sodium and chlorine atoms.
OR
Give scientific reasons for the following:
a) Ionic compounds do not conduct electricity at solid state.
b) Sodium, Potassium and Lithium metals are stored in kerosene.
c) Though aluminium is a reactive metal, it is still used to make utensils.

X. Answer the following questions : 3x3=9
25. a) Carbon atoms do not form C4+ anions or C4 – cations. Why ?
b) Explain the mechanism of cleansing action of soap.

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( BIOLOGY )
XI. Four alternatives are given for each of the following questions / incomplete
statements. Choose the correct alternative and write the complete answer along
with its letter of alphabet. 3×1=3
26. The need for suction pressure in plants is
(A) To overcome the difference in ion concentration between the root and the

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(B) To transport food in two directions

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(C) To carry water to higher parts
(D)
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To remove excess water from the leaves
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27. If the roots of a plant grow towards an area of nitrate concentration, it is

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(A) Phototropism
(B) Hydrotropism
(C) Thigmotropism
(D) Chemotropism
28. The microbe that causes syphilis is
(A) Bacteria
(B) Virus
(C) Fungus

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(D) Algae

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XII. Answer the following questions :
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Structure of the ventricles isssupplementary
3x1=3
29.
a
pumping of blood to all the lbody parts. Justify this statement with a reason.
to the function of the heart in

30. ag more variations in the organisms. Why?
Sexual reproduction causes
31. The contrast and visible traits of pea plants are listed in the below given table.
Observe. Write the genotype indicator for the pea plant that produces violet
coloured flowers and round seeds.
Type of the seed Color of the flower
Round (O) White (W)

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Wrinkled (r) Violet (w)

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XIII. Answer the following questions : 2x2=4

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32. Draw the diagram to show the structure of open stomata and label the following

las parts.
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i) Guard cells. ii) Stomata
33. Adrenaline secreted to the blood during emergency conditions changes the
course of blood circulation. Explain this statement.

XIV. Answer the following questions: 3x3=9
34. Draw the diagram to show the structure of human brain and label the following
parts

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i) Hypothalamus. ii) Pons

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83-E 6

35. A tall pea plant (TT) is crossed with a short pea plant (tt). Express the result
obtained in the F 2 generation with the help of checker board and write the types
of plants obtained.
OR
a) How is the sex of the child determined in humans? Explain.
b) Write the differences between dominant and recessive inheritance
characteristics.
36. a) Observe the food chain given below. Which trophic level organisms get
the least energy? Why?

b) At the higher levels of the atmosphere ozone is a life protecting layer’.
How?
XV. Answer the following questions : 1x4=4
37. a) Mention the function of ‘bile juice’ and ‘intestinal juice' in the process is
digestion in our body.
b) Write the events that occur during photosynthesis in plants.
OR
a) Name the molecule that forms by the breaking down of glucose in the
cytoplasm during the first stage of cellular respiration? How does this
molecule again break down in muscle cells? Explain the process of
translocation in plants.

XVI. Answer the following questions : 1x5=5
38. a) What is pollination? Write the differences between the types of
pollination.
b) What changes occur in a flower after fertilization?
OR
a) Testes are located in the lower abdomen in men. Why?
b) Explain the role of placenta in the development of an embryo into a child.
c) List any two differences between the methods of reproduction found in
spirogyra and planaria.
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