CBSE Class X Science Sample Paper 1

CBSE Class X Science Sample Paper 1. CBSE issues sample papers every year for students for class 10 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 10 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.


1. Identify the compound which is oxidized in the following reaction:

H2S + Br2 -> 2HBr + S

2. Why are titanium and chromium classified as strategic element?

3. Which has a higher resistance: a 50W lamp or 25W lamp bulb and how many times?

4. A drop of litmus solution is added to each of the four solutions give below. State the colour of litmus solution observed in each.

Soap solution, Sodium bicarbonate solution, Acetic acid, Tomato juice

5. Translate the following statements into chemical equations and then balance the equations:

a. Aluminium metal replaces iron from ferric oxide. Fe2O3, giving aluminium oxide and iron.

b. Barium chloride reacts with zinc sulphate to give zinc chloride and a precipitate of barium sulphate.

6. What is the chemical name of washing soda? Name the three chief raw materials used for making washing soda.

7. Write four characteristics used for selecting a suitable fuel.

8. How many 176Ω resistors (in parallel) are required to carry 5A on a 220V line? Distinguish between the terms electrical resistance and resistivity of a conductor.

9. What is solenoid? Draw field lines of the magnetic field through and around a current carrying solenoid. What does the magnetic field pattern inside the solenoid indicate?

10. a) What is power? b)In a house hold, 5 tube lights of 40W each are used for 5 hours and electric press of 500W for 4 hours everyday. Calculate the total electrical energy consumed by the tube lights and press in a month of 30 days.

11. Given the following reaction

2Al + Fe2O3 -> 2Fe + Al2O3 + Heat

Answer the following with reason.

a. Name the oxidising agent.

b. Name the reducing agent.

c. Name the substance oxidised.

12. A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound. Write the chemical equation for its preparation. For what purpose is it used in hospital?

13. a. Show the formation of NaCl from sodium and chlorine atoms by the transfer of electrons.

b. Why has sodium chloride, a high melting point?

c. Name the anode and the cathode used in electrolytic refining of impure copper metal.

14. What are the functions of

a. Gibberellins

b. Cytokinins

c. Absorbic acid

15. Define 'nerve impulse‘ which structure in a neuron helps to conduct a nerve impulse.

16. State three advantages associated with using solar cells to produce electricity.

17. a. State Ohm‘s law.

b. Draw the circuit diagram of Ohm‘s law.

c. What is the nature of graph in terms of relation between V and I.

18. a. An electric bulb is rated as 50W, 220V. Calculate the energy consumed by the bulb in 20 minutes. Express your answer in commercial units of electricity.

b.Distinguish between Overloading and Short Circuiting in a domestic circuit.

c.Why is it essential to earth electrical appliances having metallic body?

19. What are the environmental consequences of the increasing element for energy? What steps would  you suggest to reduce energy consumption?

20. Name the hormone thati.

is produced by thyroid gland

ii. Prepares the body for action

iii. Controls the amount of sugar in blood

iv. Brings about changes in boys at puberty

v. Brings about changes in girls at puberty

21. Draw neat and labelled diagram of digestive system.

Write the functions of the following glands.

i. Salivary gland

ii. Liver

iii. Pancreas

22. a. Why should curd and sour substances not be kept in brass and copper vessels?

b. Why does an aqueous solution of acid conduct electricity?

c. Why plaster of Paris should be stored in a moisture proof container?

d. What is efflorescence?

e. Why is baking soda used as an antacid?

23. a. State reasons for the following.

i. Metals are good conductor of heat.

ii. Addition of some silver to pure gold for making ornaments.

iii. Inability of non – metals for displacing hydrogen from dilute sulphuric acid.

b. Balance the following equations

iv. CaO + H2O -> Ca(OH)2

v. NaOH + H2SO4 -> Na2SO4 + H2O

24. a. Explain why i) solar cooker is painted black from inside.

ii) the solar cooker box is covered with a glass sheet.

iii)the plain mirror reflector is used in solar cooker.

b.Draw a neat and well labelled diagram of solar cooker


25 Absorption of light energy by mesophyll cells of leaf causes.

a) Oxidation of chlorophyll b) Excitation of chlorophyll

c) Reduction of chlorophyll d) Evolution of O2

26 Which of the following does not secrete any hormone?

a) Testis b) Spleen

c) Ovary d) Pancreas

27 Which part of sunlight is used in making solar cell?

a) Infrared radiation b) Ultraviolet radiation

c) Visible radiation d) All of these

28 Which one of the following reaction can be a non – redox reaction?

a) Combination b) Decomposition

c) Displacement d) Double displacement.

29 Which of the following metal does not react with dilute sulphuric acid to liberate H2 gas?

a) Calcium b) Sodium

c) Iron d) Silver

30 Sodium carbonate is not used as:

a) Ingredient in antacids b) As a cleaning agent

c) For removing permanent hardness of water

d) For manufacturing of glass

31 Which one of the following compounds is not an ionic compound?

a) Sodium chloride b) Calcium chloride

c) Carbon tetrachloride d) Magnesium chloride

32 Which among the following reactions are endothermic in nature?

(i) Decomposition of lead nitrate (ii) Burning of methane

(iii)Dilution of sulphuric acid (iv)Dissolution of ammonium chloride in water.

a) i. and ii. b) ii. and iii. c) iii. and iv d) i. and iv

33 Seeds which are kept in the conical flask during the experiment that CO2 is released during respiration must be.

a) Dry b) Wet

c) Germinated d) Boiled

34 The end products of aerobic respiration are

a) CO2 energy and hydrogen b) CO2 and water

c) CO2, H2O and ATP d) ADP and CO2

Refer to attached file for CBSE Class X Science Sample Paper 1.



Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Keep your kids engaged during Lockdown

Kids are the Future of our Country! Outlines have changed and so should the formats of existence! It is the best time to teach our kids the pleasure of Self-Discipline, Self-Realization and Self-Control. To keep the future generation safe in such unpredictable...

TERI Green Olympiad 2020

Green Olympiad is a value driven project conducted by TERI (The Energy and Resources Institute) for school students annually since 1999. This Olympiad assesses the environment quotient of students and also enhances their understanding on issues related to sustainable...

Revised SOP preventive measures followed while conducting examinations

Revised SOP on preventive measures to be followed while conducting examinations to contain spread of COVID-19 issued by Ministry of Health & Family Welfare Examination centres are frequented by large number of students (as well as their parents) and staff till the...

Training of CBSE School Teachers on Olabs

Training of CBSE School Teachers on Olabs in collaboration with C-DAC Mumbai: OLabs is a platform jointly developed by the Ministry of Electronics and Telecommunications, Government of India, CDAC, and Amrita University to facilitate a virtual experience of CBSE...

NEP Transforming India Quiz

As a part of Shikshak Parv celebration, an online quiz competition on National Education Policy 2020 will be organized by the Ministry of Education, Govt. of India, from 5 th September to 25th September 2020 in order to create awareness about NEP among all stakeholders...

Gandhiji Quiz by CBSE

CBSE has launched a Quiz on Mahatma Gandhi. The quiz portal can be accessed on Discover Gandhi portal at: DIKSHA platform ( and the Discover Gandhi mobile App which can be easily downloaded from Google Play Store on...

Studies Today