CBSE Class 10 Science Pre-Board Sample Paper: Before students take the final board examination, it is important that they check their level of preparedness with the help of sample papers. Sample papers give students clear insights into the design and format of the question paper. Students also get to know the typology and difficulty level of questions. This is especially essential for an important subject like science.
Schools conduct pre-board examinations for students to prepare them for the final examination. The pre-board exams give students a reality check of where they stand and help them get an idea of the score they will get in board exams.
Also Check: CBSE Class 10th Board Date Sheet 2025
In this article, we have provided the pre-board question paper for Class 10 Science along with solutions for Section A. Students should solve the paper and check with their teacher in case of doubts.
CBSE Class 10 Science Pre Board Sample Paper 2025
General Instructions
1. Section A- 16 simple/complex MCQs and 04 Assertion-Reasoning type questions carrying 1 mark each.
2. Section B- 6 Very Short Answer (VSA) type questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words.
3. Section C- 7 Short Answer (SA) type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words.
4. Section D- 3 Long Answer (LA) type questions carrying 05 marks each. Answer to these questions should be in the range of 80 to 120 words.
5. Section E- 3 source based/case based/passage based/integrated units of assessment (04 marks each) with sub-parts of the values of 1/2/3 marks.
Section-A
1. Pb + CuCl2→ PbCl2+ Cu
The above reaction is an example of:
(a) Combination
(b) Decomposition
(c) double displacement
(d) displacement
Ans. (d) displacement
2. The image shows the pH values of four solutions on a pH scale.
Identify the solutions that are alkaline in nature?
(a) A and B
(b) B and C
(c) C and D
(d) A and D
Ans. (c) C and D
3. Identify the non-metal which is lustrous.
(a) Sulphur
(b) Oxygen
(c) Nitrogen
(d) Iodine
Ans. (d) Iodine
4. The complete oxidation of ethanol gives
(a) Acetic acid/ethanoic acid
(b) CO2 and water
(c) Ethanal
(d) Acetone/Ethanone
Ans. (b) CO2 and water
5. The image shows the bread moulds on a bread. How do these fungi obtain nutrition?
(a) by eating the bread on which it is growing
(b) by using nutrients from the bread to prepare their own food
(c) by breaking down the nutrients of bread and then absorbing them
(d) by allowing other organisms to grow on the bread and then consuming them
Ans. (c) by breaking down the nutrients of bread and then absorbing them
6. Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?
(i) It turns lime water milky.
(ii) It extinguishes a burning splinter.
(iii) It dissolves in a solution of sodium hydroxide.
(iv) It has a pungent odour.
a. (i) & (ii)
b. (i) & (iv)
c. (i), (ii) & (iii)
d. All of these.
Ans. c. (i), (ii) & (iii)
7. Identify unsaturated compounds from the following:
i. Propane
ii. Propene
iii. Propyne
iv. Chloropropane
a. i & ii
b. ii & iii
c. iii & iv
d. i & iv
Ans.(b) ii & iii
Also Check: CBSE Class 10 Science CBQs Chapter-Wise PDFs
8. A student setup an experiment to study the human respiratory system. In the experiment, the student places a lighted candle and a living cockroach in flask A, while a lighted candle and a dead cockroach in flask B. The burning of candle needs oxygen.
After 10 minutes, the student observes that the candle in flask A extinguishes faster while candle in flask B keeps burning for a longer time. What can be evaluated from this experiment?
(a) candle produces high amount of carbon dioxide
(b) living beings consumes oxygen during respiration
(c) burning of candle decreases the lifespan of cockroach
(d) water vapours produced by living beings prevents burning of candle
Ans. (b) living beings consumes oxygen during respiration
9. Choose the correct route of oxygenated blood in the body starting from its oxygenation:
(a) Lungs -- pulmonary vein -- left atrium --left ventricle—aorta-- body cells
(b) Lungs -- pulmonary vein --right atrium -- right ventricle – aorta– body cells
(c) Lungs-- pulmonary artery – left atrium --left ventricle – vena cava - -body cells
(d) Lungs-- pulmonary artery--right atrium -- right ventricle-- vena cava - body cells
Ans. (a) Lungs -- pulmonary vein -- left atrium --left ventricle—aorta-- body cells
10. In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:
(a) 1:3
(b) 3:1
(c) 1:1
(d) 2:1
Ans. (c) 1:1
11. In the given figure, identify “3” and its function.
(a) It is a sensory neuron that carries the message from the receptor to the CNS
(b) It is a motor neuron that carries the message from the receptor to the CNS
(c) It is a sensory neuron that carries the message from the CNS to the effector
(d) It is a motor neuron that carries the message from the CNS to the effector
Ans. (a) It is a sensory neuron that carries the message from the receptor to the CNS
12. The least distance of distinct vision for a young adult with normal vision is about
(a) 25m
(b) 2.5cm
(c) 25cm
(d) 2.5m
Ans. (a) 25m
13. Inside the magnet, the field lines move—
(a) from north to south
(b) from south to north
(c) away from south pole
(d) away from north pole
Ans. (b) from south to north
14. Every food chain in the ecosystem begins with.......... which is the original source of food.
(a) Saprophytes
(b) Parasites
(c) Producers
(d) Herbivores
Ans. (c) Producers
15. At the time of short circuit, the current in the circuit
(a) Reduces substantially
(b) Does not change
(c) Increases heavily
(d) Vary continuously
Ans. (c) Increases heavily
16. A metallic wire of resistance 12Ω is bent to form a square. The resistance between two diagonal points would be
(a) 12 Ω
(b) 24 Ω
(c) 6 Ω
(d) 3Ω
Ans. (d) 3Ω
Also Check: CBSE Class 10 Deleted Syllabus 2024-25
Question No. 17 to 20 consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
17. Assertion (A) : When HCl is added to zinc granules, a chemical reaction occurs.
Reason (R) : Evolution of a gas and change in colour indicate that the chemical reaction is taking place.
Ans. (a) Both A and R are true, and R is the correct explanation of A.
18. Assertion(A) : Variations are seen in offspring produced by sexual reproduction.
Reason (R) : DNA molecule generated by replication is not exactly identical to original DNA.
Ans. (a) Both A and R are true, and R is the correct explanation of A.
19. Assertion (A): When pea plants (pureline) having round yellow seeds are crossed with pureline plants having wrinkled green seeds, then all pea plants obtained in F, generation bear wrinkled green seeds.
Reason (R): Round and yellow seeds are dominant to wrinkled and green seeds.
Ans. (d) A is false but R is true.
20. Assertion (A): Accumulation of harmful chemicals is higher in case of organisms at higher trophic level.
Reason (R): Food chain normally can’t reduce beyond 3 or 4 trophic level.
Ans. (b) Both A and R are true, and R is not the correct explanation of A.
To get the complete sample paper with solutions, refer to the link below:
Also, check the following important links:
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