10th Science 2nd Revision Exam Question Paper 2025

Gain an authentic exam advantage with the official 10th Science 2nd Revision Exam 2025 Question Paper. Practising with actual, recently conducted revision papers is one of the best ways to understand the latest question trends, marking schemes, and time constraints. This page provides the full-syllabus question paper covering Physics, Chemistry, and Biology sections. Use this paper to test your speed, evaluate your final preparation level, and see exactly how questions are framed for the board exams.

10TH SCIENCE SECOND REVISION EXAMINATION - 2025

Class: 10 Register Number: [__________]

Subject: SCIENCE Time Allowed: 3.00 Hours Max. Marks: 75

PART - I • I. Choose the correct answer. 12 × 1 = 12

1. In which of the following sport the turning effect of Force used?
a) Swimming b) Tennis c) Cycling d) Hockey

2. The eye defect Presbyopia can be corrected by
a) Convex lens b) Concave lens c) Convex mirror d) Bifocal lenses

3. A heating element used in the Electric iron box and the Electric heater is
a) Tungsten b) Nichrome c) Lead d) None of the above

4. Which of the following is the diatomic Molecule?
a) CO b) CO₂ c) SO₂ d) PO₄

5. Photolysis is a Decomposition reaction caused by
a) Heat b) Electricity c) Light d) Mechanical energy

6. TFM in soaps represents _______ content in a Soap.
a) Mineral b) Vitamin c) Fatty acid d) Carbohydrate

7. The Xylem and Phloem arranged side by side on same radius is called
a) Radial b) Amphivasal c) Conjoint d) None of these

8. Rabbit do not have _______ teeth.
a) Incisors b) Canines c) Premolars d) Molars

9. Which one is Referred as "Master Gland"?
a) Pineal Gland b) Pituitary Gland c) Thyroid Gland d) Adrenal gland

10. _______ is a gaseous plant hormone.
a) Auxin b) Ethylene c) Cytokinin d) Abscisic Acid

11. 9:3:3:1 ratio is due to
a) Segregation b) Crossing Over c) Independent assortment d) Recessiveness

12. All Files are Stored in the
a) Folder b) Box c) Paint d) Scanner

PART - II • II. Answer any seven questions. Q.No. 22 is compulsory. 7 × 2 = 14

13. State the Principle of Moments.

14. Differentiate the Eye defects: Myopia and Hypermetropia.

15. What connection is used in domestic appliances and why?

16. What is rust? Give the Equation for formation of Rust?

17. Fill in the Blanks:
a) The innermost layer of cortex in root is called _______
b) Glycolysis takes place in _______

18. Draw the structure of Neuron. Label any four Parts.

19. Why are thyroid hormones referred as personality hormone?

20. Match the Following:

1. Autosomes	23^rd pair of Chromosome
2. Allosomes	9:3:3:1
3. Down's syndrome	22 pairs of Chromosomes
4. Dihybrid ratio	Trisomy 21

21. Name two maize hybrids rich in Amino Acid Lysine.

22. 3.5 litres of ethanol is present in 15 litres of aqueous solution of ethanol. Calculate volume percent of ethanol solution.

PART - III • III. Answer any seven questions. Q.No: 32 is compulsory. 7 × 4 = 28

23. Differentiate Mass and Weight.

24.
a) State the Law of Volume.
b) What is Co-efficient of Cubical expansion?

25. Metal A belongs to Period 3 and group 13. A in red hot condition reacts with steam to form B. A with strong alkali NaOH forms C. Find A, B and C with reactions.

26. In what way hygroscopic substances differ from Deliquescent substances.

27. Write a note on Mesophyll.

28. Give the Importance of Transpiration.

29. Write the Physiological effects of Gibberellins.

30. Write the Importance of Ethnobotany.

31. How is a Cancer cell different from Normal cell?

32. A man is standing between two vertical walls 680m apart. He claps his hands and hears two distinct echoes after 0.9s and 1.1s respectively. What is the speed of sound in the air?

PART - IV • IV. Answer all the questions in detail. 3 × 7 = 21

33. a) Derive the Ideal gas Equation.

(OR)

b) Compare the Properties of alpha, beta and Gamma Radiations.

34. a) Explain the Salient features of Periods in the Modern Periodic table.

(OR)

b) How is Ethanol manufactured from Sugarcane?

35. a) What is Pollination? Write a note on agents of Cross Pollination?

(OR)

b) Suggest measures to overcome problems of an Alcoholic.