MBOSE Class X Science Sample Question Paper 2024-25 Meghalaya

Organisation : Meghalaya Board of School Education (MBOSE)
Class Name : SSLC (X)
Subject : Science
Download : Sample Question Paper
Year : 2024-25
Website : https://www.mbose.in/download-details/sample-question-paper-class-x-new-2024-251724403288

MBOSE Class X Science Sample Question Paper

Multiple Choice Questions: Attempt ALL Questions. (30 X 1 = 30 marks)

Related / Similar Question Paper : MBOSE Class X Maths Sample Question Paper 2024-25 Meghalaya

1. Which of the following is not a physical change?
(A) Boiling of water to give water vapour
(B) Melting of ice to give water
(C) Dissolution of salt in water
(D) Combustion of Liquefied Petroleum Gas (LPG)

2. Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
(A) 1:1
(B) 2:1
(C) 4:1
(D) 1:2

3. What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases
(ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same
(iv) Salt formation takes place

(A) (i) only
(B) ( i) and (iii )
(C) (ii) and (iii)
(D) ( i) and (iv )

4. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(A)Baking powder
(B) Lime
(C) Ammonium hydroxide solution
(D) Hydrochloric acid

5. Which of the following salts does not contain water of crystallisation?
(A) Blue vitriol
(B) Baking soda
(C) Washing soda
(D) Gypsum

6. Which of the following property is generally not shown by metals?
(A) Electrical conduction
(B) Sonorous in nature
(C) Dullness
(D) Ductility

7. The ability of metals to be drawn into thin wire is known as
(A) ductility
(B) malleability
(C) sonorit
(D) conductivity

8. Which one of the following metals do not react with cold as well as hot water?
(A) Na
(B) Ca
(C) Mg
(D) Fe

9. Name the below compound from its structure:
(A) Ethane
(B) Ethanol
(C) Ethene
(D) Propanol

10. Buckminsterfullerene has ______________ atoms in its molecule.
(A) 30
(B) 960
(C) 300
(D) 60

11. Which change occurs in the respiratory rate due to the construction of the diaphragm and rib muscles?
(A) Increases
(B) Decreases
(C) Remain the same
(D) None of the above

12. The kidneys in human beings are a part of the system for
(A) Nutrition
(B) Respiration
(C) Excretion
(D) Transportation

13. The breakdown of pyruvate to give carbon-dioxide, water and energy take place in
(A) Cytoplasm
(B) Mitochondria
(D) Nucleus
(C) chloroplast

14. Electrical impulse travels in a neuron from
(A) Dendrite→ axon→ axonal end→ cell body
(B) Cell body→ Dendrite → axon→ axonal end
(C) Dendrite →Cell body→ axon→ axonal end
(D) Axonal end→ axon → Cell body→ Dendrite

15. Posture and balance of the body is control by
(A) Cerebrum
(B) Cerebellum
(C) Medulla oblongata
(D) Pons

16. Which of the following is the correct sequence of events of sexual reproduction in a flower?
(A) pollination, fertilisation, seedling, embryo
(B) seedling, embryo, fertilisation, pollination
(C) pollination, fertilisation, embryo, seedling
(D) embryo, seedling, pollination, fertilization

17. In Spirogyra, asexual reproduction takes place by
(A) breaking up of filaments into smaller bits
(B) division of a cell into two cells
(C) division of a cell into many cells
(D) formation of young cells from older cells.

18. If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY) the seeds produced in F1 generation are
(A) round and yellow
(B) round and green
(C) wrinkled and green
(D) wrinkled and yellow

19. In which trophic level autotrophs are placed?
(A) First
(B) Second
(C) Third
(D) Last

20. Which of the following group contain only biodegradable items?
(A) grass, flowers and plastic
(B) grass, wood and plastic
(C) fruits peels, cake and lime juice
(D) coke, wood and grass

21. Which of the following statements is true?
(A) A convex lens has 4 dioptre power having a focal length 0.25 m
(B) A convex lens has –4 dioptre power having a focal length 0.25 m
(C) A concave lens has 4 dioptre power having a focal length 0.25 m
(D) A concave lens has –4 dioptre power having a focal length 0.25 m

22. Magnification produced by a rear view mirror fitted in vehicles
(A) is less than one
(B) is more than one
(C) is equal to one
(D) can be more than or less than one depending upon the position of the object in front of it

23. In torches, search lights and headlights of vehicles the bulb is placed
(A) between the pole and the focus of the reflector
(B) very near to the focus of the reflector
(C) between the focus and centre of curvature of the reflector
(D) at the centre of curvature of the reflector

24. Twinkling of stars is due to atmospheric
(A) dispersion of light by water droplets
(B) refraction of light by different layers of varying refractive indices
(C) scattering of light by dust particles
(D) internal reflection of light by clouds

25. Which of the following statements is correct regarding the propagation of light of different colours of white light in air?
(A) Red light moves fastest
(B) Blue light moves faster than green light
(C) All the colours of the white light move with the same speed
(D) Yellow light moves with the mean speed as that of the red and the violet light

26. Which of the lenses would you prefer to while reading small letters found in a dictionary?
(A) a convex lens of focal length 50 cm.
(B) a concave lens of focal length 50 cm.
(C) a convex lens of focal length 5cm.
(D) a concave lens of focal length 5cm.

27. If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
(A) 100 %
(B) 200 %
(C) 300 %
(D) 400 %

28. The resistivity does not change if
(A) the material is changed
(B) the temperature is changed
(C) the shape of the resistor is changed
(D) both material and temperature are changed

29. Choose the incorrect statement
(A) Fleming’s right-hand rule is a simple rule to know the direction of induced current
(B) The right-hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors
(C) The difference between the direct and alternating currents is that the direct current always flows in one direction, whereas the alternating current reverses its direction periodically
(D) In India, the AC changes direction after every second

30. The strength of magnetic field inside a long current carrying straight solenoid is
(A) more at the ends than at the centre
(B) minimum in the middle
(C) same at all points
(D) found to increase from one end to the other

Very Short Answer Questions: Answer any 10 (ten). (2×10=20 marks):
31. What do you mean by decomposition reaction? Give one example.
32. How bleaching powder can be prepared? Give chemical equation.
33. Write the general formula of alkanes? Give the names of two alkanes having 3 carbon atoms and the other having 4 carbon atoms.
34. Why does the aqueous solution of an acid conduct electricity?
35. How are fats digested in our bodies? Where does this process take place?
36. Write any two advantages of vegetative propagation.
37. What is zygote? How is the sex of the child determined in human beings?
38. What is ozone? Give its function.
39. What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
40. What is the role of decomposers in the ecosystem?
41. Why do we prefer a convex mirror as a rear-view mirror in vehicles? Give two reasons.
42. Why do stars twinkle?
43. Name the factors which determine the resistance of a conductor.
44. An electric iron of resistance 20 Ω takes a current of 5A. Calculate the heat developed in
30 seconds.

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