Most Expected Questions for Class 10 Science Half-Yearly Exams 2025

The Half-Yearly Exams for Class 10 are very important for every student because they act as a practice ground for the final board exams. Science, being a combination of Physics, Chemistry, and Biology, requires proper planning and preparation. Many students often feel stressed due to the vast syllabus, but preparing with expected questions can make things easier.

In this blog, we provide the most expected and important questions for Class 10 Science Half-Yearly Exams 2025. These questions are prepared based on:

• Previous year exam patterns
• NCERT textbook importance
• Commonly repeated concepts
• Teachers’ recommendations

By focusing on these questions, you can boost your confidence and score high marks.

1-Mark / Short Answer Type

1. Define the power of a lens. Write its unit.
2. What is meant by refraction of light? Give one example from daily life.
3. Why should an equation be balanced?
4. Write the laws of refraction of light.
5. Name the basic functional unit of the kidney.
6. Name the mirror that is used by a doctor in examining teeth..
7. Out of a goat and a tiger, which one will have a longer small intestine? Justify your answer.

2-Mark Questions

1. Write one use of concave and convex mirrors with suitable reasons.
2. Why is a fuse always connected to the live wire in a domestic circuit?
3. What are the advantages of connecting devices in parallel in a household circuit?
4. Distinguish between biodegradable and non-biodegradable substances with examples.
5. State the role of bile juice in digestion even though it has no enzymes.
6. Why are forests called the “green lungs” of the Earth?
7. Write balanced equations for:
   • Burning of hydrogen sulphide in air
   • Reaction of barium chloride with zinc sulphate

3-Mark Questions

1. Draw a labelled ray diagram to show image formation when an object is placed between F and P of a concave mirror. State the nature of the image.
2. A wire of length 1 m and radius 0.01 cm has a resistance of 20 Ω. Calculate the resistivity of its material.
3. Differentiate between photosynthesis and respiration.
4. Explain the role of the diaphragm in breathing in humans.
5. What happens when a copper coin is placed in silver nitrate solution? Write the chemical reaction.
6. Give two reasons why acquired traits are not inherited.
7. Explain the process of rusting of iron. State two conditions necessary for rusting.

5-Mark / Long Answer Questions

1. Two bulbs of 60 W and 100 W are connected in parallel to a 220 V supply. Find the current drawn by each bulb and the total current.
2. Explain with the help of a diagram the phenomenon of dispersion of white light by a glass prism. Why do different colours deviate differently?
3. Draw and label the human excretory system. State two vital functions of kidneys.
4. Find the position of the object of height 5 cm in front of a concave lens of focal length 20 cm to get the image at a distance of 15 cm from the lens. Also, find the height and nature of the image formed.
5. Describe the role of platelets in blood clotting. What would happen if platelets were absent?
6. Compare exothermic and endothermic reactions with suitable examples.

Quick Revision Table

Preparation Tips for Students

• Follow NCERT strictly – Most questions come directly from it.
• Prepare notes for formulas, diagrams, and definitions.
• Solve previous years’ papers to understand question trends.
• Revise diagrams daily – neat diagrams guarantee marks.
• Focus on short answer questions (2–3 marks) – they are easy scoring.
• Use flashcards or sticky notes for quick revision.
• Practice numerical problems in Physics and chemical equations in Chemistry regularly.

FAQs (Frequently Asked Questions)

Q1. Are these expected questions enough for Half-Yearly Exams?
👉 These questions cover the most important areas, but students should also revise all NCERT chapters.

Q2. How many marks can I score by preparing only important questions?
👉 You can score 60–70% easily, but for full marks, you must study the complete syllabus.

Q3. Which section is the most scoring in Science?
👉 Diagrams in Biology, definitions in Chemistry, and numericals in Physics are the most scoring.

Preparing for Class 10 Science Half-Yearly Exams becomes easy if you focus on important and expected questions. Covering Physics, Chemistry, and Biology with smart revision, formulas, diagrams, and equations will help you score high marks with confidence.

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