CBSE Class 10 Science Sample Paper 2023-24 with Additional Practice Questions by Board

CBSE Sample Paper Class 10 Science 2023-24: Check the CBSE sample paper and marking scheme for class 10 Science to know the number and type of questions expected in CBSE Class 10 Science Exam 2024. Download PDFs of sample paper and marking scheme here.
Gurmeet Kaur
Download CBSE Class 10 Science Sample Paper 2023-24 PDF

CBSE Class 10 Science Sample Paper 2023-24: The CBSE sample paper of class 10 Science for the 2024 board examination is provided in this article. The board released the sample papers for class 10 on March 31, 2023. The CBSE sample paper is the best resource for understanding the format of questions and their difficulty level for the year-end board exams. Knowing the details of the question paper pattern for the board exam this early in the year is going to be very helpful to plan studies for the Science exam in the right way. Students have enough time to practice similar questions in Science and learn the step-wise method of answering questions as suggested in CBSE marking scheme. Check and download the complete sample paper and marking scheme PDFs here in this article. 

In addition to the sample papers, CBSE recently released another set of practice papers for Class 10 major subjects. These practice papers have more competency based questions than the CBSE sample papers. Hence, the CBSE Class 10 Practice Papers serve as the additional practice questions other than the sample paper to prepare important questions for the CBSE Class 10 Board Exam 2024.

Check Class 10 Practice Papers by CBSE with Increased Competency-Based Questions for Board Exam 2024

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

Max. Marks: 80

Time Allowed: 3 hours

General Instructions:

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

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

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

iv. 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.

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v. 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.

vi. 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.

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

Also Read: CBSE Class 10 Science Syllabus 2023-24


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.


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?

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:


Refractive Index







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?

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

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.




To check all questions, download the full sample paper and its marking scheme from the links given below:

CBSE Class 10 Science Sample Paper for Board Exam 2024 (PDF)

CBSE Class 10 Science Sample Paper 2024 Marking Scheme (PDF)

CBSE Additional Practice Questions or CBSE Practice Paper for Class 10  Science

The Central Board of Secondary Education, CBSE has released additional practice questions for CBSE Class 10 Maths Board Exam 2024. The additional questions in the form of practice paper are according to the latest CBSE exam pattern. The format of the CBSE practice paper is exactly same as the CBSE sample paper however the level of questions in the practice paper is a bit higher than the sample paper. The number of competency based questions is more. Thus, the CBSE practice paper is the best resource for practising good questions to boost your CBSE Class 10 Marks. 

Check below 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:

Q.A single displacement reaction is represented below.

PQ + R ----> PR + Q

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


Type of ion of R in


Stability of PR as compared to




more stable



less stable



more stable



less stable

(a) A

(b) B

(c) C

(d) D

Q.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

Q.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?






sodium acetate

sodium chloride

ammonium chloride


sodium chloride

ammonium chloride

sodium acetate


ammonium chloride

sodium acetate

sodium chloride


ammonium chloride

sodium chloride

sodium acetate

(a) A

(b) B

(c) C

(d) D

Q.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?

(a) P

(b) Q

(c) R

(d) S

Q.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.

(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).

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

(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?

Q.Equal sized bars of aluminium and iron are exposed to the environment as shown below.

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

Q.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?

Check all questions and their answers by downloading the practice paper and its marking scheme from the respective links given below:

CBSE Class 10 Science Practice Question Paper 2024

Marking Scheme/Solution

Also Read:

CBSE Class 10 Sample Papers for Board Exam 2024 (All Subjects)

CBSE Class 10 Syllabus 2023-2024 (All Subjects)

NCERT Books for Class 10 - All Subjects

NCERT Solutions for Class 10 - All Subjects


Where can I get PDF of CBSE Class 10 Science Sample Paper 2024?

You can download PDF of CBSE Class 10 Science Sample Paper for Board Exam 2024 from the direct link provided in this article.

Is CBSE Class 10 Science Sample Paper for Board Exam 2024 released?

Yes, CBSE has released Class 10 Science Sample Paper for the CBSE Board Exam 2023-24.

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