10th Science Unit Test 1 Question Paper

Evaluate your learning right from the start of the academic year with our curated 10th Science Unit Test 1 Question Paper. Designed strictly in accordance with the latest school syllabus and blueprint, this practice paper covers the foundational initial chapters of Physics, Chemistry, and Biology. Testing yourself with this model paper is an excellent way to practice time management, identify weak areas, and master the basic definitions, formulas, and diagrams needed to build a strong foundation for your final board exams.

Marks: 25 X Standard - Science Duration: 45 minutes

Unit Test 01 / 2026-27

I. Choose the correct answer and write the answer with its code. 4 × 1 = 4

1. Impulse is equal to
a) Rate of change of momentum b) Rate of change of force and time
c) Change of momentum d) Rate of change of mass

2. To project the rockets which of the following principle(s) is /(are) required?
a) Newton's third law of motion b) Newton's law of gravitation
c) law of conservation of linear momentum d) both a and c

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

4. 1 mole of any substance contains _______ molecules.
a) 6.023 × 10²³ b) 6.023 × 10^-23 c) 3.0115 × 10²³ d) 12.046 × 10²³

II. Answer any 3 questions (3 × 2 = 6)

5. State the principle of moments.

6. Differentiate mass and weight.

7. Define: Atomicity.

8. Calculate the number of moles in i) 27g of Al ii) 1.51 × 10²³ molecules of NH₄Cl.

9. What are the major differences between atoms and molecules?

III. Answer any 2 questions. (2 × 4 = 8)

10. What are the types of inertia? Give an example for each type.

11. State the universal law of gravitation and derive its mathematical expression.

12. Write the applications of Avogadro's law.

IV. Answer any 1 question (1 × 7 = 7)

13.
i. State and prove the law of conservation of linear momentum.
ii. Calculate the velocity of a moving body of mass 5kg whose linear momentum is 2.5 kg m s^-1.

14.
i. Give the salient features of "Modern atomic theory".
ii. Calculate the gram molecular mass of H₂O and CO₂.

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