PSEB CLASS 10TH SCIENCE SAMPLE QUESTION PAPER 2025

 

Model Test Paper

SCIENCE

Class: 10th

Maximum Marks: 80

Q.1 Attempt the following Multiple Choice Questions:

1. Gurpreet brought some mint from the market. After some days, there was a strong smell from the mint. Why did this happen?
   a) Reduction
   b) Oxidation
   c) Corrosion
   d) Displacement
2. When we mix lead nitrate and potassium iodide, yellow precipitate is formed. Can you name the precipitate?
   a) Lead oxide
   b) Potassium nitrate
   c) Potassium oxide
   d) Lead iodide
3. pH of a neutral solution is:
   a) Less than 7
   b) 7
   c) Greater than 7
   d) 0
4. Tartaric acid is found in:
   a) Vinegar
   b) Nettle sting
   c) Tomato
   d) Tamarind
5. The ability of metals to be drawn into thin wires is known as:
   a) Ductility
   b) Malleability
   c) Sonorous
   d) Conductivity
6. During the electrolytic refining of copper, cathode is made of:
   a) Impure copper
   b) Pure copper
   c) Zinc
   d) Iron
7. What is the full form of ATP?
   a) Adenosine Tri-Phosphate
   b) Amino Tri-Phosphate
   c) Adenosine Tetra-Phosphate
   d) Amino Tetra-Phosphate
8. What happens when water is released from guard cells?
   a) Guard cells get closed
   b) Guard cells get open
   c) Guard cells become green in colour
   d) Dried up
9. Select the mode of excretion in plants:
   a) Dead leaves
   b) Transpiration
   c) Cellular vacuoles
   d) All the above
10. Which part of the brain can be divided into two hemispheres?
    a) Midbrain
    b) Forebrain
    c) Hindbrain
    d) Spinal cord
11. Which of the following is not an involuntary action?
    a) Vomiting
    b) Salivation
    c) Heartbeat
    d) Chewing
12. The disease caused due to sexual contact is:
    a) AIDS
    b) Cholera
    c) Elephantiasis
    d) Tuberculosis
13. The human which has XY chromosomes is called:
    a) Female
    b) Hybrid
    c) Male
    d) None of the above
14. Which of the following material cannot be used to make a lens?
    a) Water
    b) Glass
    c) Plastic
    d) Clay
15. The mode of reproduction in Spirogyra is:
    a) Budding
    b) Fragmentation
    c) Regeneration
    d) Fission
16. What will be the colour of the sky when seen from the moon?
    a) Blue
    b) Green
    c) Black
    d) Yellow
17. Which of the following metals is used in making the filament of an electric bulb?
    a) Copper
    b) Aluminium
    c) Tungsten
    d) Lead
18. Choose the instrument used to protect electric circuits from short-circuiting and overloading:
    a) Generator
    b) Motor
    c) Fuse
    d) None of the above
19. What is the molecular formula of ozone?
    a) O₂
    b) O₃
    c) O₅
    d) O₁₁
20. Which of the following is not non-biodegradable?
    a) Vegetable peel
    b) Glass
    c) Plastic bottle
    d) Leather

Match Column A with Column B

Column A	Column B
XXI. Ammeter	Concave Lens
XXII. Unit of Resistance	Ohm
XXIII. Near Sightedness	1/V + 1/U = 1/F
XXIV. Mirror Formula	Electric Current
XXV. Drinking Alcohol	Ethanol

Two Marks Questions [Attempt any 11]

2. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their function.
3. Why should a magnesium ribbon be rubbed before burning in the air?
4. Why should curd and other sour substances not be kept in brass or copper vessels?
5. What is the role of acid in our stomach?
6. What are the two properties of carbon which lead to the huge number of carbon compounds we see around us?
7. How does our body respond when adrenaline is secreted in our blood?
8. How is the sex of a child determined in human beings?
9. Define the principal focus of a concave mirror.
10. What is accommodation in the human eye?
11. Give the characteristics of magnetic field lines.
12. What is ozone? How does it affect an ecosystem?
13. Which two gases are released during the electrolysis of water? Mention the chemical equation related to it.
14. Why do stars twinkle?
15. What would be the consequence of the deficiency of hemoglobin in our bodies?
16. A doctor has prescribed a corrective lens of power +1.5D. Find the focal length of the lens. Is the prescribed lens diverging or converging?

Three Marks Questions [Attempt any 6]

17. When an iron nail is dipped in copper sulphate solution, what will be the observation after some time? Explain with an equation.
18. What is a homologous series? Explain with the help of an example.
19. Draw the structure of a neuron and explain its functions.
20. Write two differences between real image and virtual image. What will be the size of the image formed by a convex lens when the object lies at 2F?
21. What is myopia? What are the reasons for it? How can the defect be corrected?
22. Explain biological magnification.
23. How does chemical coordination take place in plants?
24. The focal length of a concave lens is 2m. Calculate the power of the lens.
25. How would you distinguish experimentally between an alcohol and a carboxylic acid?

Five Marks Questions

26. a) Differentiate between sexual reproduction and asexual reproduction (any 3).
    b) Write 2 advantages of sexual reproduction over asexual reproduction.

    Or

    a) Draw a labelled diagram of the longitudinal section of a flower.
    b) What are the changes seen in girls during puberty?

27. Differentiate between metals and non-metals.

    Or

    a) What are amphoteric oxides? Give 2 examples of amphoteric oxides.
    b) Why do ionic compounds have high melting points?

28. What is Ohm’s Law? How will you verify Ohm’s Law in the laboratory?

    Or

    a) An electric heater of resistance 8 Ohms draws 15 A from service mains for 2 hours. Calculate the rate at which heat is developed in the heater.
    b) Why is series arrangement not used in domestic circuits?