10th Science Model Test Question Paper

The ultimate way to build real exam confidence is to simulate the final test day itself. This Class 10 Science Model Test Question Paper covers the complete syllabus across physics, chemistry, and biology, following the exact structure, marking distribution, and question patterns of the official board exams. Featuring a balanced mix of objective multiple-choice questions, descriptive short answers, application-based case studies, and vital diagrams, this full-length model paper acts as your perfect dress rehearsal to master your time management and evaluate your overall readiness.

SCIENCE EXAMINATION 2024-25

STD: 10TH (Type - A) TIME: 2½ hrs

CHAPTER - 1, 7, 12, 13 MARKS: 75

PART - A [14 × 1 = 14]

Note: (i) Answer all the questions.
(ii) Choose the most appropriate answer and write the corresponding option code of the answer.
EXAM NO: ____________________

1. If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will
a) decrease by 50% b) increase by 50%
c) decrease by 25% d) increase by 300%

2. Impulse is equals to
a) rate of change of momentum b) rate of force and time
c) change of momentum d) rate of change of mass

3. Assertion: The Relative Atomic mass of aluminium is 27
Reason: An atom of aluminium is 27 times heavier than 1/12th of the mass of the C-12 atom.
a) A and R are correct, R explains the A. b) A is correct, R is wrong. c) A is wrong, R is correct. d) A and R are correct, R doesn't explains A.

4. Which of the following is a triatomic molecule?
a) Glucose b) Helium c) Carbon dioxide d) Hydrogen

5. Which of the following represents 1 amu?
a) Mass of a C - 12 atom b) Mass of a hydrogen atom c) 1/12th of the mass of a C- 12 atom d) Mass of O - 16 atom

6. In the nucleus of ₂₀Ca⁴⁰, there are
a) 20 protons and 40 neutrons b) 20 protons and 20 neutrons
c) 20 protons and 40 electrons d) 40 protons and 20 electrons

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. Kreb's cycle takes place in
a) chloroplast b) mitochondrial matrix c) stomata d) inner mitochondrial membrane

9. Oxygen is produced at what point during photosynthesis ?
a) when ATP is converted to ADP b) when CO₂ is fixed c) when H₂O is splitted d) All of these

10. The body of leech has
a) 23 segments b) 33 segments c) 38 segments d) 30 segments

11. Mammals are _______ animals.
a) Cold blooded b) Warm blooded c) Poikilothermic d) All the above

12. The brain of leech lies above the
a) Mouth b) Buccal Cavity c) Pharynx d) Crop

PART - B [7 × 2 = 14]

13.
(i) Give the common name of the Hirudinaria granulosa.
(ii) Write the dental formula of rabbit.
(iii) What does CNS stand for?
(iv) How many pairs of testes are present in leech?

14.
(i) What is collateral vascular bundle?
(ii) What is the common step in aerobic and anaerobic pathway?
(iii) Where does the carbon that is used in photosynthesis come from?
(iv) Name the phenomenon by which carbohydrates are oxidized to release ethyl alcohol.

15.
(i) Define: Relative atomic mass.
(ii) Define: Atomicity
(iii) What is Molar volume of a gas?
(iv) Find the percentage of nitrogen in ammonia.

16.
(i) Give any two examples for heterodiatomic molecules.
(ii) Define inertia. Give its classification.
(iii) While catching a cricket ball the fielder lowers his hands backwards. Why?
(iv) Calculate the velocity of a moving body of mass 5 kg whose linear momentum is 2.5 kg m s^-1.

17. At what height from the centre of the Earth the acceleration due to gravity will be 1/4th of its value at the earth.

18. Calculate the gram molecular mass of the following: 1) H₂O 2) CO₂ 3) Ca₃(PO₄)₂ 4) CCl₄

19. Fill in the blanks:
1. Atoms of one element can be transmuted into atoms of other element by _______.
2. The sum of the numbers of protons and neutrons of an atom is called its _______.
3. Relative atomic mass is otherwise known as _______.
4. The average atomic mass of hydrogen is _______ amu.

20. Differentiate mass and weight.

21. State Newton's laws of motion?

PART - C [7 × 4 = 28]

22. Calculate the number of water molecule present in one drop of water which weighs 0.18 g.

23.
(i) Write the reaction for photosynthesis?
(ii) What is respiratory quotient?

24. List out the parasitic adaptations in leech.

25. Differentiate: Atom and Molecules.

26. Describe rocket propulsion.

PART - D (ANY - 3) [3 × 7 = 21]

27. Explain the male reproductive system of rabbit with a labelled diagram.

28. Differentiate the following:
a) Monocot root and Dicot root
b) Aerobic and Anaerobic Respiration.

29. Deduce the equation of a force using Newton's second law of motion.