Class 10 Science Sample Paper Term 1 With Solutions Set D

Please refer to Class 10 Science Sample Paper Term 1 With Solutions Set D provided below. The Sample Papers for Class 10 Science have been prepared based on the latest pattern issued by CBSE. Students should practice these guess papers for class 10 Science to gain more practice and get better marks in examinations. The Term 1 Sample Papers for Science Standard 10 will help you to understand the type of questions which can be asked in upcoming examinations.

Term 1 Sample Paper for Class 10 Science With Solutions Set D

Section-A

1. In the reaction PbS + 2H₂O₂ → PbSO₄ + 4H₂O, select the option that correctly identifies substance oxidized and substance reduced.
(a) PbS is oxidized and H₂O is reduced
(b) PbSO₄ is oxidized and H₂O₂ is reduced
(c) PbS is oxidized and H₂O₂ is reduced
(d) PbSO₄ is reduced and H₂O₂ is oxidized

2. The chemical formula of few hydrated salts is given in the table below.

Select the rows containing the incorrect number of molecules of water of crystallization in each salt.
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (I) and (III)
(d) Both (III) and (IV)

3. Hydrogen is placed along with Alkali metals in the modern periodic table though it shows non-metallic character
(a) as Hydrogen has one electron & readily loses electron to form negative ion.
(b) as Hydrogen can easily lose one electron like alkali metals to form positive ion.
(c) as Hydrogen can gain one electron easily like Halogens to form negative ion.
(d) as Hydrogen shows the properties of non-metals.

4. Which of the following equations correctly represents the physical states of reactants and products?
(a) 2Fe_SO_4(aq) → Fe₂O_3(aq) + SO_2(g) + SO_3(g)
(b) 2FeSO_4(s) → Fe₂O_3(s) + SO_2(g) + SO_3(g)
(c) 2FeSO_4(s) → Fe₂O_3(aq) + SO_2(g) + SO_3(g)
(d) 2Fe_SO_4(aq) → Fe₂O_3(s) + SO_2(g) + SO_3(g)

5. The figure below depicts the Chlor alkali process.

Select the row containing correct identification of the products labelled as I, II and III and their use.

6. Observe the table given below and match the reaction given in column I with the type of reaction given in column II.

(a) (A)- (I) ; (B) – (IV) ; (C) – (II) ; (D) – (III)
(b) (A)- (I) ; (B) – (IV) ; (C) – (III) ; (D) – (II)
(c) (A)- (II) ; (B) – (IV) ; (C) – (III) ; (D) – (I)
(d) (A)- (II) ; (B) – (IV) ; (C) – (I) ; (D) – (III)

7. During reaction of which metals with cold water, hydrogen gas catches fire?
(I) Sodium
(II) Calcium
(III) Magnesium
(IV) Potassium
(a) Both (I) and (II)
(b) Both (III) and (IV)
(c) Both (I) and (IV)
(d) Both (II) and (IV)

8. Observe the reaction between metal salt and dilute HCl and select the correct combination from the table given:

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

9. The effect of gas formed by heating sulphur powder on litmus paper is:
(a) It turns both dry blue litmus paper and moist blue litmus paper red.
(b) It turns dry blue litmus paper red but has no effect on moist blue litmus paper.
(c) It has no effect on dry blue litmus paper but turns moist blue litmus paper red.
(d) It has no effect on both dry blue litmus paper and moist blue litmus paper.

10. Which of the following metals form an amphoteric oxide?
(a) Al
(b) Na
(c) Cu
(d) Ca

11. Fungi are:
(a) Heterotrophic
(b) Autotrophic
(c) Saprophytic
(d) Parasitic

12. In humans, there are …………. pairs of salivary glands.
(a) Two
(b) Three
(c) Six
(d) Four

13. Which pancreatic enzyme helps in digesting proteins?
(a) Pepsin
(b) Trypsin
(c) Chylomicrons
(d) Both (a) and (b)

14. Why are arteries thick walled?
(a) They are under low pressure
(b) So that blood does not excude from the vessels
(c) They are under high pressure
(d) Both (b) and (c)

15. Name the cartilaginous flap which closes the opening of wind pipe durings swallowing:
(a) Glottis
(b) Epiglottis
(c) Gullet
(d) Epivalve

16. Study the flow chart given below representing the transport of oxygen and carbon dioxide in human beings.
Air → Nostril → W → Windpipe → X → Lungs → Y → Blood → Z
Choose the correct option in the given table:

17. A ray of light is incident obliquely on medium 1 and then passes through two media namely 2 and 3 before emerging into medium 1 again.

The refractive index of medium 3 with respect to medium 1 is:
(a) 1/2
(b) √3/2
(c) 1/√2
(d) √3

18. The power of a lens of focal length 20 cm in diopter is:
(a) 0.25 D
(b) 2.0 D
(c) 5.0 D
(d) 0.05 D

19. If the magnification of a lens has a positive value, the image formed is:
(a) inverted
(b) real and inverted
(c) real
(d) Virtual and erect

20. An object is placed 40 cm from the concave mirror with a focal length of 20 cm. The image formed is:
(a) behind the mirror
(b) between the mirror and focus
(c) at focus
(d) centre of curvature of mirror

21. The graph below shows variation of refractive index of earth’s atmosphere with altitude.

Select the correct observations:
(I) The refractive index of earth is gradually increasing with decrease in altitude.
(II) Star light will get scattered more on entering the earth’s atmosphere before reaching earth’s surface.
(III) Star light will get bend more away from the normal as it reaches the earth’s surface.
(IV) Star light will get bend more towards the normal as it reaches the earth’s surface.
(a) Both (I) and (III)
(b) Both (I) and (IV)
(c) Both (II) and (III)
(d) Both (II) and (IV)

22. Velocity of light in air is 3 × 10⁸ m/s and its velocity in a medium X is 1.0 × 10⁸ m/s. Then, refractive index of medium X is:
(a) 3
(b) 5
(c) 0.5
(d) 2

23. Which of the following phenomenons of light are involved in the formation of ranibow?
(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

24. At the traffic signals, red light is used for stop due to the reason that it can be seen from a distance. This phenomenon is known as:
(a) Refraction
(b) Diffraction
(c) scattering
(d) Total internal reflection

Section-B

25. As red light has highest wavelength to visible spectrum, therefore red lights scatters least.
Identify the precipitate formed and the type of reaction of reaction in the following experiment:

26. Calcium phosphate is present in tooth enamel. What happen when we consume sweets?
(a) We suffer from diabetes
(b) Dissolution of enamel
(c) No effect on teeth is observed
(d) Teeth become weak from roots

27. Which of the following show a chemical reaction?
(a) MgSO₄ + Fe
(b) ZnSO₄ + Fe
(c) CaSO₄ + Pb
(d) CuSO₄ + Fe

28. Which of the following metals melt when kept on your palm?
(I) Sodium (II) Mercury
(III) Caesium (IV) Gallium
(a) (I) and (III)
(b) (II) and (IV)
(c) (III) and (IV)
(d) (II) and (III)

29. Which of the following can be used as an acid–base indicator by a visually impaired student?
(I) Red cabbage lead extract
(II) Turmeric
(III) Vanilla essence
(IV) Onion extract
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (III) and (IV)
(d) (I), (III) and (IV)

30. Which acids are present in oranges and spinach?
(a) Citric acid in both
(b) Oxalic acid in both
(c) Oxalic acid and citric acid respectively
(d) Citric acid and oxalic acid respectively

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): Quicklime reacts vigorously on dissolving in water releasing a large amount of heat.
Reason (R): This chemical reaction is an exothermic reaction.

32. Assertion (A): Food cans are not coated with zinc.
Reason (R): Because zinc is less reactive than tin.

33. Assertion (A): Diffusion process does not meet high energy requirement of multicellular organism.
Reason (R): Diffusion is a fast process but only occurs at the surface of the body.

34. Assertion (A): In prism, higher the refractive index, lower will be the angle of deviation.
Reason (R): The angle of deviation is inversely proportional to the angle of the prism.

35. Identify the option from the table given below that correctly represents the cation and anion in the formation of Magnesium Chloride

36. In the activity to demonstrate that chlorophyll is essential for photosynthesis, a plotted plant with variegated leaves is first taken and kept in a dark room for three days after which it is kept in sunlight for about six hours. The leaf is then plucked, the green areas traced and then the leaf is first dipped in boiling water for a few minutes and then immersed in a beaker containing alcohol as shown in diagram below:

The reason why leaf is immersed in hot alcohol is to:
(a) remove chlorophyll
(b) stop photosynthesis
(c) dissolve starch
(d) dissolve phloem

37. The part of the alimentary canal where complete digestion of food takes place is:
(a) Mouth cavity
(b) Stomach
(c) Liver
(d) Small intestine

38. Observe the diagram of structure of nephron.

Match the labeling referred in column I and correlate with the function/structure in column II.

(a) (I) – (D); (II) – (B); (III) – (A); (IV) – (A)
(b) (I) – (A); (II) – (C)); (III) – (D); (IV) – (B)
(c) (I) – (C); (II) – (D); (III) – (B); (IV) – (A)
(d) (I) – (C); (II) – (A); (III) – (D); (IV) – (B)

39. A student marked the position of an object and its image formed by a lens as shown in the figure below:

Select the row containing the correct identification of lens and position of object:

40. When an object is placed in front of a converging lens, a magnified erect image is formed. The distance of the object from the lens will be:
(a) Equal to two focal lengths
(b) Between one and two focal lengths
(c) Equal to one focal length
(d) Less than one focal length

41. The following diagram show the cross section of leaf.

Choose the correct option with respect to the function of labelled parts:
(a) A- Helps in transportation of gases throughout the length of plants
(b) B- Convert chemical energy into light energy via the photosynthetic process.
(c) C- Allows gaseous exchange between the leaf and the outside atmosphere through the stomata 
(d) D- Guard cells from pathogen attacks

42. The glucose breakdown pathway in case of aerobic respiration is shown in the flow chart given below.

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus.

43. Look at the figure given below and select the correct option.

(a) Image formed is virtual, erect and magnified
(b) Image formed is virtual, erect and diminished
(c) Image formed is real, inverted and magnified
(d) Image formed is real, inverted and diminished.

44. A convex lens of local length 20 cm is placed in contact with a concave lens of local length 40 cm. The local length of this combination of lenses will be:
(a) + 40 cm
(b) + 20 cm
(c) – 40 cm
(d) – 20 cm

45. To obtain an image of magnification (–3), an object should be in which position in case of concave mirror?
(a) Between F and 2 F
(b) At F
(c) Between F and C
(d) Beyond 2 F

46. Why the sun appears white at noon?
(a) scattering is reduced if the distance to be travelled in air is increased.
(b) scattering is increased if the distance to be travelled in air is reduced.
(c) scattering is reduced if the distance to be travelled in air is reduced.
(d) the sun is overhead at noon

47. Which colour suffers least deviation on passing through a prism?
(a) Blue
(b) Red
(c) White
(d) Violet

48. A compound is formed between A and B by transfer of electrons from A to B. Which of the following properties will be shown by the compound?
(I) It has high melting point
(II) It occurs as solid
(III) It is generally malleable
(IV) It conducts electricity in solid state.
(a) Both (I) and (II)
(b) Both (I) and (III)
(c) Both (II) and (IV)
(d) Both (III) and (IV)

Section-C

Q. 49 to 52 are based on Case Study–1
Case 1:

Some metals are more reactive than others. In an experiment, a strip of metal is added to a solution of a compound of another metal. A more reactive metal displaces (pushes out) a less reactive metal from its compound.

49. On keeping the iron nails dipped in copper sulphate solution for about 30 minutes the changes you will observe is:
(a) Iron nails become brownish in colour and the blue colour of copper sulphate solution fades.
(b) Iron nails become brownish in colour and the blue colour of copper sulphate solution changes to orange.
(c) Iron nails become bluish in colour and the blue colour of copper sulphate fades.
(d) No reaction takes place.

50. When hydrogen sulphide gas is passed into an aqueous solutions of copper sulphate?
(a) Displacement reaction takes place
(b) Black precipitate of copper sulphide is obtained
(c) Yellow precipitate of copper oxide is obtained
(d) Both (a) and (b)

51. Displacement reaction is also known as:
(a) precipitation reaction
(b) combination reaction
(c) substitution reaction
(d) none of the above

52. On adding dilute hydrochloric acid to the reaction mixture of sodium sulphate and barium chloride, white precipitate disappears. Which of the following is correct explanation?
(a) HCl decomposes barium sulphite
(b) barium chloride is insoluble in water
(c) displacement reaction takes place
(d) barium sulphite is a salt of strong acid

Q. 53 to 56 are based on Case Study–2
Case 2: The human heart, is an organ that pumps blood throughout the body via circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes. A heart attack occurs when the flow of blood to the heart is blocked. The blockage is most often a buildup of fat, cholesterol and other substances, which form a plaque in the arteries that feed the heart (coronary arteries). The plaque eventually breaks aways and form a clot. The interrupted blood flow can damage or treatment has improved dramatically over the years.
Not all people who have heart attacks have the same symptoms or have the same severity of symptoms’

53. The function of heart is:
(a) To lubricate the food for swallowing and helps in digestion of starch.
(b) To receive blood from the veins and pumps it into the arteries.
(c) To carry digested and absorbed fat from intestine and drains excess fluid from extra cellular space back into the blood.
(d) To receive blood from the arteries and pump if into the veins

54. Which of the following statement is not correct?
(a) Human heart allows mixing of
oxygenated and deoxygenated blood.
(b) Deoxygenated blood poured into right artium of heart.
(c) Human heart does not allow mixing of deoxygenatcd and oxygenated blood.
(d) Both (b) and (c) are incorrect.

55. Which of the following statement(s) is incorrect?
(a) Vein are thin walled
(b) Arteries are thick walled
(c) Capillaries are thick walled
(d) Both (b) and (c) are incorrect.

56. Which of the following are common heart attack symptoms?
(a) Nausea or heartburn
(b) Shortness of breath, Cold and Caugh
(c) Chest tightness and chest pain
(d) Both (a) and (c)

Q. 57 to 60 are based on Case Study–3
Case 3: Lenses made of transparent materials such as glass or plastic with curved surfaces. Diverging lenses are thicker at their edges than at their centres and make light rays passing through them spread out. Converging lenses are thicker in middle than at edges and make light rays passing through them focus at a point.

57. Abhishek uses two lenses I and II of same size and same material as shown P₁ and P₂ are the powers of A and B. An object is kept at the same distance from the lenses between F and 2F of each lens on the principal axis in turn Let I₁ and I₂ be the image formed by two lenses respectively. Which one of the following statements is correct for the images formed?

(a) Distance or image I₂ will be less than distance or image I₁ from the lens
(b) Size or image I₁ will be equal to size or image I₂.
(c) Distance of image I₂ will be greter than distance or image I₁ irom the lens.
(d) Size of image I₁ wil be lesser than size or image I₂.

58. For lenses I and II :
(a) P₁ = P₂
(b) P₁ < P₂
(c) P₁ > P₂
(d) P₁ is positive and P₂ is negative

59. A beam of light is incident on the box through the holes on side A and emerges out of the holes on the side B of the box:

Which of the following is present the box?
(a) Concave lens
(b) Rectangular glass plate
(c) Prism
(d) Convex lens

60. Sakshi conducts an experiment to produce an image of an object on a screen which is placed at 20 cm from the lens. She uses a convex lens of focal length 15 cm produce the sharpest image?
(a) 20 cm in front of the lens
(b) 8 cm in front of the lens
(c) 15 cm in front of the lens
(d) 60 cm in front of the lens