2024 SEBA/ASSEB Class 10 General Science Question Paper | HSLC Previous Year Paper

2024 SEBA/ASSEB HSLC Class 10 General Science Previous Year Question Paper – Assam Board Exam

Class 10 General Science , 2024 Question Paper

                                          SECTION – B

 Choose the correct answer :    1× 45 = 45

1. Addition of aqueous solution of barium chloride to aqueous solution of sodium sulphate results in insoluble barium sulphate and the solution of sodium chloride . Which of the following is the correct balanced chemical equation with state symbols for the above reaction ?

(a)  

(b)  

(c)  

(d)  

2. Which of the following does not involve a chemical reaction ?

(a) Digestion of food     (b) Respiration    (c) Burning of candle     (d) Melting of candle

3. Which of the following laws is satisfied by a balance chemical reaction ?

(a) Conservation of momentum        (b) Conservation  of mass   

(c) Conservation of energy                 (d) Conservation of density  

4. Which one of the following is olfactory indicator ?

(a) Litmus     (b) Turmeric   (c) Vanilla     (d) Phenolphthalein

5. Metal oxides are

(a) acidic     (b) basic     (c) neutral     (d) None of the above

6. are commonly known as ………. And …………. Respectively .

(a) washing soda, baking soda    (b) baking soda , washing soda   (c) caustic soda, baking soda

(d) baking soda, caustic soda

Q7. Consider the following statements regarding tooth decay :

(i) Tooth decay starts at a pH lower than 5.5

(ii) Tooth decay is caused by phosphoric acid which lowers pH .

(a) (i) is true and (ii) is false       (b) (i) is false and (ii) is true      (c) Both (i) and (ii) are true        (d) Both (i) and (ii) are false

8. Which of the following metals is the most malleable ?

(a) Sodium     (b) Iron     (c) Gold      (d) Copper

9. If metal A displaces metal B from its solution ,then

(a) A is more reactive than B metal      (b) B is more reactive than A metal       (c) A and B metals are non-reactive    (d) A and B metals are equally reactive.

10. Cinnabar is a sulphide ore of which metal ?

(a) Copper    (b) Mercury     (c) aluminium     (d)Iron

11. What can be the maximum number of sulphur atoms present in a molecule ?

(a) 2    (b) 4    (c)  8     (d)  10

12. The name of a compound containing three carbons and aldehyde as function group is

(a) propane    (b) propanol    (c) propane     (d) propanal

13. Which of the following statements is true for an oxidizing agent ?

(a) It gives hydrogen    (b) It gives oxygen  (c) It takes oxygen  (d) None of the above

14. In the Periodic Table, which of the following properties increase from top to bottom in a group ?

(i) Valency    (ii) Metallic character   (iii) Effective nuclear charge  (iv) Atomic radius

(a) (i) and (ii)    (b) (ii) and (iv)    (c) (iii) and (iv)     (d) (i) and (iv)

15. Element X forms a chloride with the formula , which is a solid with high melting point. X would most likely be in same group of the periodic Table as

(a) Na     (b) Mg        (c) Al            (d) Si

 16. A spherical mirror and a thin spherical lens have each a focal length of – 15 cm . The mirror and the lens are likely to be

(a) both convex    (b) both concave    (c) the mirror is concave and the lens is convex  (d) the mirror is convex and the lens is concave

17. A boy is unable to see objects when they are placed 17 cm from his eye but can see objects beyond 40 cm from his eye . This defect can be corrected by using

(a) convex lens     (b) concave lens     (c) bifocal lens     (d) contact lens

18. The image formed by a concave mirror is observed to be virtual , erect and larger than the object. Where should be the position of the object ?

(a) Between the principal focus and the centre of curvature      (b) At the centre of curvature  

(c) Beyond the centre of curvature           (d) Between the pole of the mirror and its principal focus .

19. In an experiment, the variation of current with the applied voltage for a conducting material is obtained as shown below :

Photo

Which of the following conclusions is /are true about the conductor ?

(i) Current increase linearly with the voltage

(ii) Resistance is different for different values of V.

(iii) The slope of the graph is same for every value of V and I .

(a) (i) only     (b) (i) and (iii)    (c) (ii) only    (d) (i) and (ii)

20. Which among the following diagrams correctly represents the current-carrying wire and the magnetic field associated with it ?

(a)     (b)      (c)     (d)  Photo

21. Which of the following correctly describes the magnetic field near a long straight wire ?

(a) The field consists of straight lines perpendicular to the wire .      (b) The field consists of straight lines parallel to the wire .

(c) The field consists of concentric circles centred on the wire .         (d) The field consists of radical lines originating the wire .

22. The human eye forms the image of an object at its

(a) iris    (b) pupil    (c) retina    (d) cornea

23. Why is he colour of the clear sky blue ?

(a) Due to reflection of light      (b) Due to refraction of light      (c) Due to scattering of light     (d) Due to atmospheric layers

 24. Which of the following is not derived from the Sun’s energy ?

   (a) Wind energy  (b) Geothermal energy   (c) Nuclear energy    (d) Biomass

25. 1kWh = ................... joule

(a)       (b)          (c)        (d)   

26. The SI unit of power of a lens is :

(a) joule    (b) dioptre     (c) ohm     (d) ampere

27. 1 eV = ...........................

(a) J   (b) J    (c) J    (d) J  

28. Ozone, at the higher levels of the atmosphere, prevents

(a) infrared radiations   (b) visible light   (c) UV radiations   (d) Both (a) and (c)

29. Which of the following is not a renewable source of energy ?

(a) Sun     (b) Wind     (c) Fossil fuel   (d) Water

30. The source of the formation of coal and petroleum is

(a) coliform   (b) biomass     (c) greenhouse gas    (d) ocean water    

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Posted 3 days ago