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CBSE Class 10 Science Sample Paper for 2024 Board Exam

In this article, we are providing the CBSE sample paper of class 10 Science for the 2024 board exam. The sample papers for class 10 were released by the board on March 31, 2023. The CBSE sample papers are amongst the best resources for understanding the format and difficulty level of questions for the year-end board exams for class 10 and 12.

It will be quite helpful for students to plan studies for the Science exam in the right way by analysing the pattern of the question paper for the board exam. Students can practice answering similar questions and use the step-wise method of answering questions as suggested in CBSE marking scheme. We can find the complete sample paper as given below.

In addition to the sample papers, CBSE had also released another set of practice papers for all the major subjects of Class 10. The new set of practice papers have more competency based questions than the CBSE sample papers. Therefore, the Practice Papers for CBSE Class 10 board exams can prove to be excellent supplement for preparation through additional practice questions provided by the board for the CBSE Class 10 Board Exam 2024.

CBSE Class 10 Science (Code No.086) Sample Question Paper 2023-24

Max. Marks: 80 | Time Allowed: 3 hours

General Instructions:

  1. This question paper consists of 39 questions in 5 sections.

  2. All questions are compulsory. However, an internal choice is provided in some questions. A student is expected to attempt only one of these questions.

  3. Section A consists of 20 objective type questions carrying 1 mark each.

  4. Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words.

  5. Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words.

  6. Section D consists of 3 Long Answer type questions carrying 05 marks each. Answer to these questions should be in the range of 80 to 120 words.

  7. Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-parts.

Section A

Select and write the most appropriate option out of the four options given for each of the questions 1-20. There is no negative mark for incorrect response.


Practice question for CBSE Class 10 Science Board Exam showing two test tubes containing sodium sulphate solution and barium chloride solution respectively

Identify the product which represents the solid state in the above reaction.

a) Barium Chloride

b) Barium Sulphate

c) Sodium Chloride

d) Sodium Sulphate

2. The colour of the solution observed after 30 minutes of placing zinc metal to Copper Sulphate solution is

a) Blue

b) Colourless

c) Dirty green

d) Reddish Brown

3. Mild non-corrosive basic salt is

a) Ca (OH)2

b) NaCl

c) NaOH

d) NaHCO3

4. On adding dilute Sulphuric Acid to a test tube containing a metal ‘X’, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal ‘X’?

a) Sodium

b) Zinc

c) Copper

d) Silver

5. Which one of the following correctly represents Sodium Oxide?

Image containing different possible combinations for Sodium Oxide in practice question for CBSE Class 10 Science Board exam

6. An element with atomic number_____ will form a basic oxide.

a) 7 (2,5)

b) 17 (2,8,7)

c) 14 (2,8,4)

d) 11 (2,8,1)

7. An element ‘M’ has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is:

a) 10

b) 12

c) 14

d) 18

8. Generally food is broken and absorbed within the body of organisms. In which of the following organisms is it done outside the body?

a) Amoeba

b) Mushroom

c) Paramoecium

d) Lice

9. Receptors are usually located in sense organs. Gustatory receptors are present in

a) tongue

b) nose

c) eye

d) ear

10. A farmer wants to grow banana plants genetically similar enough to the plants already available in his field. Which one of the following methods would you suggest for this purpose?

a) Regeneration

b) Budding

c) Vegetative propagation

d) Sexual reproduction

11. Height of a plant is regulated by:

a) DNA which is directly influenced by growth hormone.

b) Genes which regulate the proteins directly.

c) Growth hormones under the influence of the enzymes coded by a gene.

d) Growth hormones directly under the influence a gene.

12. A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to:

a) lack of carbon dioxide and formation of pyruvate.

b) presence of oxygen and formation of ethanol.

c) lack of oxygen and formation of lactic acid.

d) lack of oxygen and formation of carbon dioxide.

13. An object is placed in front of a convex mirror. Its image is formed:

a) at a distance equal to the object distance in front of the mirror.

b) at twice the distance of the object in front of the mirror.

c) half the distance of the object in front of the mirror.

d) behind the mirror and its position varies according to the object distance.

14. When light enters the atmosphere it strikes on extremely fine particles, which deflect the rays of light in all possible directions, This is due to -

a) reflection of light

b) atmospheric refraction

c) scattering of light

d) dispersion of light

15. In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent depletion of “Y”. “X” and “Y” respectively referred here are:

a) Ozone; CFCs

b) CFCs; rays UV

c) CFCs; Ozone

d) UV rays; Diatomic oxygen

16. Which of the following features relates to biodegradable substances?

a) Broken down by biological processes

b) Remain inert

c) Persist in environment for long time

d) May harm the ecosystem

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: Rusting of Iron is endothermic in nature.

Reason: As the reaction is slow, the release of heat is barely evident.

18. Assertion: Probability of survival of an organism produced through sexual reproduction is more than that of organism produced through asexual mode.

Reason: Variations provide advantages to individuals for survival.

19. Assertion: A compass needle is placed near a current carrying wire. The deflection of the compass needle decreases when the magnitude of the current in the wire is increased.

Reason : The strength of a magnetic field at a point near the conductor increases on increasing the current.

20. Assertion: Biodegradable substances result in the formation of compost and natural replenishment.

Reason: It is due to breakdown of complex inorganic substances into simple organic substances.


Question No. 21 to 26 are very short answer questions

21. Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.

22. State the post-fertilisation changes that lead to fruit formation in plants.

23. What is the purpose of making urine in the human body? Name the organs that stores and releases the urine.


Why do arteries have thick and elastic walls whereas veins have valves?

24. The refractive indices of three media are given below:

Medium Refractive Index

A 1.6

B 1.8

C 1.5

A ray of light is travelling from A to B and another ray is travelling from B to C.

(a) In which of the two cases the refracted ray bends towards the normal?

(b) In which case does the speed of light increase in the second medium? Give reasons for your answer.

25. A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this parallel combination is R1, what is the value of the ratio R1 : R?


Refer to the image below and state how the magnetic field pattern indicates regions where the magnetic field is stronger outside the magnet? What happens to the magnetic field when the current in the circuit is reversed?

Image showing magnetic field pattern for practice question for CBSE Class 10 Science board exam

26. Study the food chain given below and answer the questions that follow:

Image showing food chain for practice question for CBSE Class 10 Science board exam

a) If the amount of energy available at the third trophic level is 100 joules, then how much energy will be available at the producer level? Justify your answer.

b) Is it possible to have 2 more trophic levels in this food chain just before the fourth trophic level? Justify your answer.

Additional Practice Questions for CBSE Class 10 Science Board Exam

The Central Board of Secondary Education had released additional practice questions for CBSE Class 10 Science Board Exam 2024 for the benefit of students appearing in the year-end exams. The additional questions provided are in accordance with the latest CBSE exam pattern. Even though the format of the CBSE practice paper is exactly as that of the CBSE sample paper, the level of questions provided in the practice paper is a bit higher than that of the questions in the sample paper and the number of competency based questions is more making the CBSE practice paper an excellent resource for preparing for the CBSE Class 10 Science board exam and score higher marks.

Given below are some questions from the CBSE Class 10 Science Practice Paper to understand the level of questions that can be expected in CBSE Board Exam 2024.

1. A single displacement reaction is represented below.

PQ + R ----> PR + Q

Which of the following is true about the reactants and products?

Option Type of ion of R in product Stability of PR as compared to PQ

A cation more stable

B cation less stable

C cation more stable

D cation less stable

(a) A

(b) B

(c) C

(d) D

2. Some types of chemical reactions are listed below.

- decomposition

- combination

- displacement

- double displacement

Which two of the following chemical reactions are of the SAME type?

P) AgNO3+ NaCl ---> AgCl + NaNO3

Q) Mg + 2HCl ---> MgCl2+ H2

R) CH4+ 2O2---> CO2 + 2H2O

S) 2KOH + H2SO4---> K2SO4+ H2O

(a) P and Q

(b) Q and R

(c) R and S

(d) P and S

3. Sonia has aqueous solutions of three salts, sodium acetate, sodium chloride and ammonium chloride in three test tubes. The test tubes are not labeled.

On checking, she finds the pH of the solutions to be 4.6, 7.0 and 8.9.

Which of the following correctly matches the salts with their respective pH?

pH4.6 pH7.0 pH8.9

A Sodium Acetate Sodium Chloride Ammonium Chloride

B Sodium Chloride Ammonium Chloride Sodium Acetate

C Ammonium Chloride Sodium Acetate Sodium Chloride

D Ammonium Chloride Sodium Chloride Sodium Acetate

(a) A

(b) B

(c) C

(d) D

4. Oxygen saturation levels refer to the extent Haemoglobin is bound to oxygen. As altitude increases, the atmospheric pressure decreases.

Which of the following graphs correctly represents the oxygen saturation levels as altitude increases?

Image showing graphs for oxygen saturation compared to altitude for practice question for CBSE Class 10 Science board exam

(a) P

(b) Q

(c) R

(d) S

5. Search mirrors are mirrors that are used to look for hidden objects underneath the cars as shown. The hidden objects can be easily spotted as the mirror provides a wider field of view.

Image showing mirror being used for checking under a car for practice question for CBSE Class 10 Science board exam

(a) What type of mirrors are generally used to make search mirrors?

(b) With the help of a ray diagram describe the nature of image formed by the type of mirror identified in (a).

6. A helical coil whose length is greater than its diameter is connected to a battery as shown below.

Image showing helical coil for practice question for CBSE Class 10 Science board exam

(a) How does the magnetic field at point P compare with the magnetic field at point Q? Justify your answer.

(b) State one way in which the strength of the magnetic field inside a current carrying helical coil can be changed?

7. Equal sized bars of Aluminum and iron are exposed to the environment as shown below.

Image showing bars of aluminium and iron for practice question for Class 10 Science board exam

Which of them is likely to corrode till the level marked by the line FIRST? Justify your answer.

8. Absolute refractive indices of two media P and Q are 1.33 (nP) and 2.52 (nQ) respectively. The speed of light in medium P is 2 x 108 m/s.

(a) What would be the speed of light in medium Q (VQ)?

(b) If the angle of incidence for a ray of light travelling from medium P to Q is 0°, then what will be the path of light in the medium Q?

Practice similar questions from your course book to prepare yourself properly for CBSE Class 10 Science Board Exam.

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