Class 10 Science Sample Paper Term 1 With Solutions Set A | CBSEVerse

We have provided below Class 10 Science Sample Paper Term 1 With Solutions Set A. These CBSE Sample Papers for Class 10 Science will help you to do practice and understand the type of questions expected to come in the Science exams for Class 10. The Sample Guess papers provided by us for Grade 10 Science have been prepared based on the current academic years instructions and examination guidelines provided by CBSE. All question papers have been provided with solutions.

CBSE Sample Paper for Class 10 Science Term 1 With Solutions Set A

SECTION – A

1. Which of the following is not a chemical change?
(a) Getting salt from sea water
(b) Ripening of fruits and vegetables
(c) Formation of curd from milk
(d) Burning of coal

2. Hydrogen chloride gas is prepared by the reaction between substances labelled A and B in the figure below. On a humid day, the gas is usually passed through a guard tube containing C.

Identify the substances A, B and C and select the row containing the correct labelling of the substances A, B and C.

Class 10 Science Sample Paper Term 1 With Solutions Set A

3. An element X having atomic number 13 forms a compound with element Y having atomic number 9. The cations and anions formed will be:
(a) 3[X+] and [Y3-]
(b) [X3+] and 3[Y]
(c) 3[X+] and 3[Y]
(d) [X3+] and [Y3-]

4. The table below lists some metals in column I and the colour of coating or powder on their surface due to corrosion on them in column II.

Class 10 Science Sample Paper Term 1 With Solutions Set A

Match the metals given in column I with the correct change mentioned in column II:
(a) (I) – (D); (II) – (C); (III) – (B); (IV) – (A)
(b) (I) – (A); (II) – (D); (III) – (B); (IV) – (C)
(c) (I) – (B); (II) – (A); (III) – (D); (IV) – (C)
(d) (I) – (D); (II) – (A); (III) – (B); (IV) – (C)

5. Baking soda is:
(a) sodium hydrogen carbonate
(b) sodium hydroxide
(c) sodium carbonate decahydrate
(d) calcium oxychloride

6. Study the figure below showing the reaction between Manganese dioxide and aluminium.

Class 10 Science Sample Paper Term 1 With Solutions Set A

Select the row containing the correct process marked A and B and substances undergoing the change from the table below:

Class 10 Science Sample Paper Term 1 With Solutions Set A

7. Two gases ‘G‘ having suffocating odour are obtained when a green solid ‘S‘ is heated, along with a residue ‘R’. These gases are major air pollutants. When the vapours of the gases are collected and dissolved in water, the solution turns blue litmus to red. The colour of the residue becomes red.

Class 10 Science Sample Paper Term 1 With Solutions Set A

What would be S, R, G.
(a) Pb[NO3]2, PbO2, NO2, N2O4
(b) FeSO4, FeO2O3, H2O, H2O2
(c) FeSO4, Fe2O3, SO2, SO3
(d) PbSO4, Pb2O2, SO2, SO3

8. Which of the following equation represent chlor-alkali process?
(a) 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g)
(b) 2NaCl(aq) + H2O(l) → NaOH(aq) + Cl2(g) + H2(g)
(c) NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + 2H2(g)
(d) NaCl(aq) + H2O(l) → NaOH(aq) + Cl2(g) + H2(g)

9. When a few drops of phenolphthalein is added to a solution having pH 10.5, then the colour:
(a) changes to blue
(b) changes to pink
(c) changes to red
(d) does not change

10. Photosynthesis is considered an:
(a) Endothermic Reaction
(b) Exothermic Reaction
(c) Physical Reaction
(d) Endothermic and Physical Reaction

11. A plot of various abiotic factors affecting the rate of transpiration is given below :

Class 10 Science Sample Paper Term 1 With Solutions Set A

After analyzing the graph a student writes the following statements.
(I) The rate of transpiration increases with increase in light intensity, wind speed and humidity.
(II) The rate of transpiration decreases linearly with increase in light intensity, temperature and humidity.
(III) The rate of transpiration decreases with increase in humidity.
(IV) The rate of transpiration increases with increase in light intensity, temperature and humidity.
Choose from the following which of the following would be the correct statement(s).
(a) Only (I)
(b) Only (II)
(c) Only (III)
(d) Both (I) and (IV)

12. Which part of alimentary canal receives bile from the liver?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus

13. A man developed sudden muscle cramps while jogging.

Class 10 Science Sample Paper Term 1 With Solutions Set A

The reason for muscle cramps could be:
(a) Build up of alcohol in muscles
(b) Build up of lactic acid in muscles
(c) Lack of water in the body
(d) Build up of carbon dioxide in muscles

14. Select the incorrect statements about lymph:
(I) It is also called tissue fluid
(II) It is similar to RBC of blood
(III) It drains into blood capillaries
(IV) It carries digested and absorbed fat from intestines
(a) Both (II) and (IV)
(b) Both (I) and (IV)
(c) Both (I) and (III)
(d) Both (II) and (III)

15. Which of the following are true about breathing?
(I) The diaphragm and muscles attached to ribs relax during inhalation.
(II) The thorax moves upwards and outwards during inhalation, thereby decreasing the volume inside thoracic cavity.
(III) During exhalation, the muscles of diaphragm and ribs relax.
(IV) The thoracic cavity contracts and comes back to its original size during exhalation.
(a) Both (I) and (III)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) Both (III) and (IV)

16. The transport of soluble products of photosynthesis is called:
(a) Transpiration
(b) Exhalation
(c) Translocation
(d) Nutrition

17. Select the correct statements:
(I) The centre of curvature C of a spherical mirror is a part of the mirror.
(II) The centre of curvature of a concave mirror lies in front of it.
(III) The centre of curvature of a concave mirror lies behind the mirror.
(IV) The centre of curvature of a convex mirror lies behind the mirror.
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) Both (II) and (IV)

18. The table below gives the refractive index of a few materials and the speed of light in that medium.

Class 10 Science Sample Paper Term 1 With Solutions Set A

The speed of light in a medium ‘A’ having refractive index 2.00 will be:
(a) 1.5 × 108 m/s
(b) 2.0 × 108 m/s
(c) 3.0 × 108 m/s
(d) 6.0 × 108 m/s

19. Deeksha determined the focal length of a glass piece X by focusing a distant object on the screen as shown in the following diagram.

Class 10 Science Sample Paper Term 1 With Solutions Set A

Which of the following statement is correct?
(a) Device X is a concave mirror and distance d is its focal length.
(b) Device X is a concave mirror and distance d is its radius of curvature.
(c) Device X is a convex lens and distance d is its radius of curvature.
(d) Device X is a convex lens and distance d is its focal length.

20. A pole of height 1.8 m stands in front of a larger vertical plane mirror. The distance of the image from the pole at a distance of 1.5 m from the mirror is:
(a) 1.8 m
(b) 1.5 m
(c) 1.2 m
(d) 3.0 m

21. Which of the following is the correct set-up of protractor for tracing the path of ray of light through a glass prism, for measuring the angle of incidence?

Class 10 Science Sample Paper Term 1 With Solutions Set A

22. Aarav viewed his enlarged image in front of a mirror. He asked his father what kind of mirror that is. The father replied it was a concave mirror. What could be possible position of Aarav to view such image in the mirror?
(a) between f and 2f
(b) beyond 2f
(c) at 2f
(d) between f and P

23. The air layer of atmosphere whose temperature is less than the hot layer behave as optically:
(a) denser medium
(b) rarer medium
(c) inactive medium
(d) either denser or rarer medium

24. The danger signals are red in colour because it is:
(a) strongly scattered by fog or smoke
(b) least scattered by fog or smoke
(c) least absorbed by fog or smoke
(d) strongly absorbed by fog or smoke

SECTION – B

25. Which of the following reactions given below are not examples of double displacement reactions?
(I) Cu(s) + 2AgNO3(aq) → Cu(NO3)2(aq) + 2Ag(s)
(II) NaOH + HCl → NaCl + H2O
(III) AlCl3(aq) + 3NH4OH(aq) → Al(OH)3(s) + 3NH4Cl(aq)
(IV) Pb(NO3)2(aq) + 2NaCl(aq) → 2NaNO3(aq) + PbCl2(s)

(a) Only (I)
(b) Both (I) and (II)
(c) Both (II) and (III)
(d) (I), (II) and (IV)

26. The table provides the pH value of four solutions P, Q, R and S

Class 10 Science Sample Paper Term 1 With Solutions Set A

Which of the following correctly represents the solutions in increasing order of their hydronium ion concentration?
(a) P > Q > R > S
(b) P > S > Q > R
(c) S < Q < R < P
(d) S < P < Q < R

27. Which of the following metals do not react with oxygen even at high temperature?
(I) Lead (II) Silver
(III) Zinc (IV) Gold
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (I) and (III)
(d) Both (II) and (IV)

28. Select the correct observations when calcium is treated with water:
(I) Ca reacts with cold water
(II) Ca reacts with hot water
(III) Ca does not react either with cold water or with hot water.
(IV) Ca starts floating as the bubbles of hydrogen gas stick to its surface.
(a) Both (I) and (II)
(b) Both (I) and (IV)
(c) Both (II) and (IV)
(d) Both (III) and (IV)

29. Select the correct statements regarding metal oxides:
(I) Metal oxides are basic in nature
(II) Metal oxides are acidic in nature
(III) Metal oxides react with acid to form salt and water.
(IV) Metal oxides react with base to form salt and water.
(a) Both (I) and (III)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (II) and (IV)

30. Which of the following statement do not correctly represent the use of sodium hydroxide?
(a) It is used in paper making
(b) It is used to rayon and acetate fibers
(c) it is used in killing bacteria in drinking wastes and in swimming pool
(d) It is used in detergents and soaps to remove greases.

Question No. 31 to 34 consist of two statements– Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Options:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

31. Assertion (A): Ammonium chloride is an acidic salt.
Reason (R): It is a salt of weak base [NH4Cl] and strong acid [HCl]

32. Assertion (A): The following chemical equation, C6H6 +(15/2)O2 →6CO2 + 3H2O is a balanced chemical equation.
Reason (R): In a balanced chemical equation, the total number of molecules is equal on both side of the equation.

33. Assertion (A): Each lung contain a residual volume of air.
Reason (R): It provide sufficient time for oxygen to be absorbed and carbon dioxide to be released.

34. Assertion (A): The sky looks blue during day.
Reason (R): No atmosphere containing air in the outer space to scatter sunlight.

35. Which of the following metals will not produce hydrogen gas with dilute HCl?
(a) Mg
(b) Cu
(c) Al
(d) Zn

36. The event that does not occur in photosynthesis
(a) Absorption of light energy by chlorophyll
(b) Conversion of light energy to chemical energy
(c) Splitting of water molecules into hydrogen and oxygen
(d) Oxidation of carbon to carbon dioxide

37. The direction of diffusion of carbon dioxide and oxygen gases in plants depends on:
(I) Environmental conditions
(II) Plant requirements
(III) Rate of transpiration
(IV) Amount of ATP available
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) Both (II) and (IV)

38. The figure below shows the first step in the breakdown of glucose.

Class 10 Science Sample Paper Term 1 With Solutions Set A

Identify A and B and select the correct combination from the table below:

Class 10 Science Sample Paper Term 1 With Solutions Set A

39. The following table shows the absolute refractive index of some material medium.

Class 10 Science Sample Paper Term 1 With Solutions Set A

When light passes from benzene to alcohol:
(a) It will bend towards normal
(b) It will bend away from normal
(c) It will go without any deviation
(d) It will be reflected internally

Class 10 Science Sample Paper Term 1 With Solutions Set A

40. The focal length of the convex lens is:
(a) + 10 cm
(b) + 20 cm
(c) – 10 cm
(d) – 20 cm

41. The separation of the left and right side of the heart is useful in:
(a) Preventing oxygenated and deoxygenated blood from mixing
(b) Pumping blood to different body parts efficiently
(c) Exchange of gases
(d) Ensuring that blood flows in one direction only

42. The blood vessel that collects the blood from different organs and brings it back to the heart is:
(a) Arteries
(b) Veins
(c) Capillaries
(d) Lymph

43. A student uses a lens of focal length 40 cm and another of – 20 cm. The power and focal length of the combination will be:

Class 10 Science Sample Paper Term 1 With Solutions Set A

44. If an object is placed perpendicular to the principal axis of a convex lens of focal length 8 cm and object distance is 12 cm, the image will be formed at?
(a) 12 cm behind the lens
(b) 12 cm in front of the lens
(c) 24 cm behind the lens
(d) 24 cm in front of the lens

45. The colour of the scattered light depends on:
(a) Size of the scatterer
(b) Total internal reflection
(c) Dispersion of light
(d) Atmospheric refraction

46. The apparent flattening of the sun’s disc at sunrise and sunset is due to:
(a) Dispersion of light
(b) Atmospheric refraction
(c) Scattering of light
(d) Diffraction of light

47. Pratik conducts an experiment using an object of height 10 cm and a concave lens with focal length 20 cm. The object is placed at a distance of 25 cm from the lens:
(a) Yes, as the image formed will be real
(b) No, as the image formed will be inverted
(c) No, as the image formed will be virtual
(d) Yes, as the image formed will be erect

48. Which of the following are ionic compounds?
(I) MgCl2
(II) HCl
(III) CCl4
(IV) Na2O
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (I) and (IV)
(d) (I), (II) and (IV)

SECTION – C

Q. 49 to 52 are based on Case Study–1
Case 1: The table given below, in which samples of four metals P, Q, R and S were taken and added to the following solutions one by one. The results obtained have been tabulated as follows.

Class 10 Science Sample Paper Term 1 With Solutions Set A

49. Which is the most reactive metal?
(a) P
(b) Q
(c) R
(d) S

50. Which is the least reactive metal?
(a) P
(b) R
(c) Q
(d) S

51. What would you observe if Q is added to a solution of copper (II) sulphate?
(a) Combination reaction takes place
(b) Decomposition reaction takes place
(c) Displacement reaction takes place
(d) No reaction takes place

52. The increasing order of reactivity of metals P, Q, R and S is :
(a) P < Q < R < S
(b) S < R < Q < P
(c) S < R < P < Q
(d) Q < P < R < S

Q. 53 to 56 are based on Case Study–2
Case 2: The biological process involved in the removal of harmful metabolic wastes from the body is called excretion. Different organisms use varied strategies to do this. Many unicellular organisms remove these wastes by simple diffusion from the body surface into the surrounding water while complex multicellular organisms use specialised organs to perform the same function.

53. A network of tiny blood vessels located at the beginning of a nephron is:
(a) Renal calyces
(b) Renal pyramid
(c) Glomerulus
(d) Bowman’s capsule

54. Each kidney is made up of a large number of excretory units called:
(a) Glomerulus
(b) Nephrons
(c) Bowman’s Capsule
(d) Blood capillaries

55. The correct sequence of urine formation is
(a) Filtration, reabsorption, secretion
(b) Secretion, reabsorption, filtration
(c) Reabsorption, secretion, filtration
(d) Reabsorption, filtration secretion

Class 10 Science Sample Paper Term 1 With Solutions Set A

After studying the above graph, a student noted down the following observations:
(I) The serum uric acid level is same for both men and women for risk below 10.
(II) Serum uric acid level should be under 8.0 mg/dl for both men and women for relative risk below 10.
(III) The normal Serum uric acid level is more for women and less for men for the same relative risk.
(IV) The normal Serum uric acid level is more for men and less for women for the same relative risk.
Select the correct statement(s):
(a) Only (II)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (I) and (III)

56. The speed of light in air 300000 km/s whereas that of speed in a glass slab is about 197000 km/s. What is the reason for the difference in speed of light in two media?
(a) Difference in density.
(b) Difference in amount of light.
(c) Difference in density of wind flow.
(d) Difference in temperature.

Q. 57 to 60 are based on Case Study–3
Case 3: Suppose a car is travelling across the road towards a muddy track at an angle, the mud shows down one side of the car, and the path of the car bends. The more it is slowed, the more is bends.
Upon exiting the track on the opposite side, the car speeds up and achieves its original speed. This analogy represents light wave travelling from rarer medium to denser medium. Thus, a ray of light travelling from a rarer medium to denser medium bends towards normal. When it travels from closer medium to rarer medium, it bends away from normal.

Class 10 Science Sample Paper Term 1 With Solutions Set A

57. The speed of light in air 300000 km/s whereas that of speed in a glass slab is about 197000 km/s. What is the reason for the difference in speed of light in two media?
(a) Difference in density.
(b) Difference in amount of light.
(c) Difference in density of wind flow.
(d) Difference in temperature.

58. Which of the following explains the law of refraction of light through the glass slab?
(a) Light always bends towards the normal in a glass slab.
(b) The incident ray, the refracted ray, and the normal to the interface always lie on the same plane.
(c) Ray of light travelling in the air is always considered as the incident ray, and the one in the glass is the refracted ray.
(d) Ray of light always travels in a straight path irrespective of change in medium.

59. The speed of light in air is 3 × 108 ms–1, whereas that of the speed of light in water is 2.26 × 108 ms–1. What is the refractive index of water with respect to air?
(a) 2.64
(b) 1
(c) 1.32
(d) 0.75

60. A ray of light continues moving along the same path while passing through air, glass interface. The angle of incidence for the ray is:
(a) zero
(b) 90º
(c) less than 90º
(d) grater than 90º

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