SAMPLE PRACTICE PAPER – 1
CLASS – 10 (SCIENCE)

Class 10 Science Sample Paper – 1 is designed as per the latest CBSE syllabus. It includes a balanced mix of objective-type questions, short answer questions, long answer questions, and case-based questions from Physics, Chemistry, and Biology. The paper aims to help students practice and assess their conceptual understanding, application skills, and exam readiness. Ideal for pre-board and final exam preparation.

1. The reaction between barium chloride and sodium sulphate is called Double Decomposition reaction because:
a) the reactants interchange their ions to form two new compounds
b) All of these
c) a precipitate is formed
d) two new compounds are formed
2. Assertion (A): Quicklime reacts vigorously with waterreleasing a large amount of heat.
Reason (R): The above chemical reaction is an exothermic reaction.
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.

3. Common salt besides being used in kitchen can also be used as raw material for making?

1. Washing soda
2. Bleaching powder
3. Baking soda
4. Slaked lime
   a) All of these
   b) A and D
   c) A and C
   d) B and D

4. On putting few drops of an unknown liquid on the pH strip as shown here, the colour of pH strip changed to violet. The liquid taken is likely to be :

a) dilute acetic acid
b) dilute sodium hydroxide
c) water
d) dilute hydrochloric acid

5. Which one of the following properties is not generally exhibited by ionic compounds?
a) Electrical conductivity in solid state
b) Electrical conductivity in molten state
c) Solubility in water
d) High melting and boiling points

6. State one property in each of these alloys, which is different from its main constituents Bronze

7. A metal is heated with dil H₂ SO₄. The gas evolved is collected by the method shown in the figure. Answer the following questions based on it:

Name the gas evolved.
a) H₂ gas
b) O₂ gas
c) CO gas
d) CO₂ gas

8. Match the following with the correct response:

a) 1 –  D, 2 –  A, 3 –  C, 4 –  B
b) 1 –  C, 2 –  B, 3 –  D, 4 –  A
c) 1 –  A, 2 –  C, 3 –  B, 4 –  D
d) 1 –  B, 2 –  D, 3 –  A, 4 –  C

9. Which of the following statement is correct:
Statement A: Many compounds containing sulphur are used as medicines.
Statement B: Cast iron contains 3% to 5% carbon.
a) Both the statements are true.
b) Statement A is true; statement B is false.
c) Statement A is false; statement B is true.
d) Both the statements are false.

10. What are the end products of fat digestion?
a) Amino acid, fatty acid
b) Glycerol, amino acid
c) Glucose, amino acid
d) Fatty acid, glycerol

11. What happen if conducting tubes of circulatory system develops a leak? State in brief, how could this be avoided?

12. The substance that triggers the fall of mature leaves and fruits from plants is due to
a) cytokinin
b) gibberellin
c) abscisic acid
d) auxin

13. Give one function of hypothalamus?

14. Which of the following statements are true about the brain?

1. The main thinking part of brain is hind brain.
2. Centers of hearing, smell, memory, sight, etc are located in fore brain.
3. Salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
4. Cerebellum does not controls posture and balance of the body.

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

15. No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be :
a) Either plane or convex
b) Convex
c) Plane
d) Concave

16. What are the two factors on which the lateral displacement of an emergent ray from a glass slab depend?

17. Assertion (A): In diffused reflection, a parallel beam of incident light is reflected in different direction.
Reason (R): The diffused reflection of light is due to the failure of the laws of reflection.
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.

18. Select from the following the best experimental set – up for tracing the path of a ray of light passing through a rectangular glass slab:

a) P
b) S
c) R
d) Q

19. Which of the following colours is least scattered by fog, dust or smoke?
a) Blue
b) Yellow
c) Red
d) Violet

20. The coloured light that refracts most while passing through a prism is:
a) Red
b) Blue
c) Yellow
d) Violet

Class 10 English Ch-1 A Letter to God Questions Answers

21. Why are dangerlight signalsred in color?

22. Assertion (A): White light is dispersed into its seven – color components by a prism.
Reason (R): Different colors of light bend through different angles with respect to the incident ray as they pass through a prism.
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.

23. If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is:
a) 5 A
b) 30 A
c) 0.5 A
d) 0.3 A

24. Assertion (A): When the current through a bulb decreases by 0.5% the glow of the bulb decreases by 1%.
Reason (R): Glow (Power) is directly proportional to the square of the current.
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.

25. State True or False:
1.For spherical mirrors of small apertures, the radius of curvature is found to be equal to twice the focal length.

26. Explain the chemical reaction when a wall is whitewashed.

27. During electrolysis of brine, a gas Gis liberated at anode. When this gas Gis passed through slaked lime, a compound Cis formed, which is used for disinfecting drinking water.
1. Write the formula of Gand C.
2. State the chemical equation involved.
3. What is the common name of compound C? Give its chemical name.

28. Draw Human Heart and label its parts.

29. Draw ray diagram showing the image formation by a concave mirror when an object placed between pole and focus of the mirror.

30. Match the following:

31. What is dispersion? What happens when light is passed through a glass prism?

32. Name the instrument used to measure current and state how it should be connected in a circuit.

33. Give the characteristic tests for the following gases
i. CO2
ii. SO2
iii. O2
iv. H2

34. In the following schematic diagram for the preparation of hydrogen gas as shown in fig, what would happen if following changes are made?

Instead of dilute sulphuric acid, dilute hydrochloric acid is taken.

35. Nervous and hormonal system together performs the functions of control and coordination in human beings. Justify the statement.

36. Read the following and answer any four questions:
Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up.The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.

1. Which of the following does not form an acidic salt?
   a. Phosphoric acid
   b. Carbonic acid
   c. Hydrochloric acid
   d. Sulphuric acid
2. Which of the following salts has no water of crystallization?
   a. Blue vitriol
   b. Washing soda
   c. Baking soda
   d. Gypsum
3. The formula of baking soda is
   a. K₂CO
   b. KHCO₃
   c. NaHCO₃
   d. Na₂CO₃
4. Which of the following is treated with chlorine to obtain bleaching powder
   a. CaSO₄
   b. Ca(OH)₂
   c. Mg(OH)₂
   d. KOH
5. Which of the following salt is used for removing the permanent hardness of water
   a. Washing soda
   b. Baking soda
   c. Bleaching powder
   d. NaOH

37. Read the following and answer the questions any four from (i) to (v):
A rainbow is a natural spectrum appearing in the sky after rain. It is caused by the dispersion of sunlight by tiny water droplets, present in the atmosphere.

1. The clear sky appears blue because
   a. blue light gets absorbed in the atmosphere.
   b. ultraviolet radiations are absorbed in the atmosphere.
   c. violet and blue lights get scattered more than lights of all other colours by the atmosphere.
   d. light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.
2. Which of the following phenomena of light are involved in the formation of a rainbow?
   
   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
3. Why sky appears dark to passengers flying at very high altitudes?
   a. As scattering is not prominent at such heights.
   b. Scattering is maximum at height
   c. Eyesight became weak at height
   d. None of these
4. Which of the following statement is correct?
   I. Sunlight is always in the opposite direction of the sun
   II. A rainbow is a natural spectrum appearing the sun
   III. Only dispersion helps in rainbow formation
   IV. Rainbow is formed by cloud
   a. (I) and (IV)
   b. (I) and (II)
   c. (I), (II) and (IV)
   d. (II) and (IV)
5. Which of the following is the incorrect match?

Class 10 Science Sample Paper- 1 Answers