10th Science Unit Test 1 Question Paper

Prepare effectively for your first terminal assessments with the complete Class 10 Science Unit Test 1 Question Paper. Designed to serve as a vital evaluation tool, this practice paper covers essential foundational topics across Physics, Chemistry, and Biology. Students can test their knowledge through a structured format that includes objective multiple-choice questions, brief conceptual queries, and detailed long-answer sections. Whether you are studying under the CBSE framework, Maharashtra State Board, or Tamil Nadu syllabus, practicing with this mock paper helps build speed, improves accurate answering techniques, and highlights the core topics you need to master for your board exam preparation.

SCIENCE - UNIT TEST - 1

[LN - 1, 2, 3, 7, 8, 9]

Unit - 1 LAWS OF MOTION

2 mark questions

1. Define inertia give its classification

2. Classify the types of force based on their application

3. If a 5N and a 15N forces are acting opposite to one another, find the resultant force under the direction of action of the resultant force

4. Differentiate mass and weight

5. Define moment of a couple

6. State the principle of moments

7. State Newton's second law

4 and 7 marks questions:

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

2. State Newton's laws of motion?

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

4. State and Prove the law of conservation of linear momentum

5. Describe rocket propulsion

6. Give the applications of universal law of gravitation

Unit - 2 OPTICS

2 mark questions

1. What is refractive index?

2. State Snell's Law

3. State Rayleigh's Law of scattering

4. What are the causes of myopia?

5. Why does the sky appear in blue colour?

6. Why are traffic signals red in colour?

4 and 7 marks questions:

1. Differentiate convex lens and concave lens

2. Differentiate myopia and hypermetropia

3. List any five properties of light

4. Explain the rules for obtaining images formed by a convex lens with the help of ray diagram

Unit - 3 THERMAL PHYSICS

2 mark questions

1. Define one calorie

2. State Boyle's law

3. State the law of volume

4. State the Charles's law

5. State the Avogadro's law

6. Distinguish between ideal gas and real gas

4 and 7 marks questions:

1. Derive the ideal gas equation

2. Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram

Unit 7 ATOMS AND MOLECULES

2 mark questions

1. Define atomicity

2. Give any two examples for hetero diatomic molecules

3. What is molar volume of a gas?

4 and 7 marks questions:

1. N₂ + 3H₂ → 2NH₃
[The atomic mass of nitrogen is 14, and that of hydrogen is 1]
1 mole of nitrogen (------ g) +
3 moles of hydrogen (------ g) →
2 moles of ammonia (------ g)

2. Calculate the number of moles in:
1. 27g of Al
2. 1.51 × 10²³ molecules of NH₄Cl

3. Give the salient features of 'modern atomic theory'

4. Derive the relationship between relative molecular mass and vapour density

5. Calcium carbonate is decomposed on heating in the following reaction:

CaCO₃ → CaO + CO₂
1. How many moles of calcium carbonate are involved in this reaction?
2. Calculate the gram molecular mass of calcium carbonate involved in this reaction
3. How many moles of CO₂ are there in this equation?

Unit - 8 PERIODIC CLASSIFICATION OF ELEMENTS

2 mark questions

1. A is a reddish brown metal, which combines with O₂. Find A, B and C with reaction.

2. A is a silvery white metal. Find A and B

3. What is rust? Give the equation for formation of Rust.

4. State two conditions necessary for rusting of iron

5. Explain smelting process

6. Name the acid that renders aluminium passive. Why?

Unit - 9 SOLUTIONS

2 mark questions

1. Define the term solution

2. What is meant by binary solution

3. What is aqueous and non-aqueous solution? Give an example

4. Define volume percentage

5. The aquatic animals live more in cold region. Why?

6. Define hydrated salt

7. Classify the following substance into deliquescent, hygroscopic: Conc. sulphuric acid, copper sulphate pentahydrate, Silica Gel, calcium chloride and Gypsum salt

4 and 7 marks questions

1. Write notes on 1. saturated solution 2. unsaturated solution

2. Write notes on various factors affecting solubility

3. a) What happens when MgSO₄·7H₂O is heated? Write the appropriate equation b) Define solubility

4. In what way hygroscopic substances differ from deliquescent substances.

5. A solution is prepared by dissolving 45g of sugar in 180g of water. Calculate the mass percentage of solute

6. 3.5 litres of Ethanol is present in 15 litres of aqueous solution of Ethanol. Calculate volume percentage of Ethanol solution

7. 'A' is a blue coloured crystalline salt. On heating it loses blue colour and gives B. When water is added "B" gives back to A. Identify A and B, and write the equation