Most Expected Questions For Class 10 Science Half-Yearly Exams

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Half-yearly exams are often seen as the first “big test” of Class 10. Unlike periodic tests, they cover a wide portion of the syllabus and give you a clear reality check before boards come into the picture. For many students, half-yearlies feel overwhelming: “So much syllabus, so little time!”

But here’s the truth: with the right focus, you don’t need to fear these exams. What matters is smart preparation, knowing the syllabus, practicing the right kind of questions, and managing your revision time effectively.

In this guide, you’ll find out why half-yearly exams are important for you, a list of the most expected questions based on past trends and repeated exam patterns, and also some practical tips to prepare efficiently in the limited time you have.

By the end of this blog, you’ll feel more confident and clear about how to tackle Science half-yearlies without stress.

Why Half-Yearly Exams Are Important

Half-yearly exams are more than just “internal assessments.” They work like a checkpoint in your Class 10 journey:

Foundation for Boards: The concepts you revise here will reappear in pre-boards and the final board exams.
Identifying Weaknesses: Since there’s still half a year left, these exams highlight areas you need to improve without the pressure of finals.
Exam Practice: They help you get into the habit of writing long answers, solving numerical problems under time limits, and presenting neat diagrams.
Confidence Boost: Performing well here gives you the motivation to tackle the bigger exams later with less stress.

In short, half-yearlies are your practice match before the real tournament.

What are the most expected questions for the Class 10 Science Half-Yearly Exam?

Here are the most expected and frequently asked questions you should practice for your upcoming half-yearly exams. These are picked from repeated exam trends and important concepts. Think of this as your go-to question bank for quick preparation.

Note: The half-yearly syllabus may vary from school to school depending on how fast the teachers complete chapters. So, it is always recommended to double-check the official syllabus shared by your school before preparing.

1-Mark / Short Answer Type

Define the power of a lens. Write its unit.
What is meant by refraction of light? Give one example from daily life.
Why should an equation be balanced?
Write the laws of refraction of light.
Name the basic functional unit of the kidney.
Name the mirror that is used by a doctor in examining teeth..
Out of a goat and a tiger, which one will have a longer small intestine? Justify your answer.
The process in which loss of water in the form of vapours from the aerial parts of plants takes place is X, which helps in Y. Here X and Y respectively are :-
1. (a) transpiration and translocation.
2. (b) transpiration and temperature regulation.
3. (c) translocation and movement of soluble products of photosynthesis in phloem.
4. (d) translocation and absorption of water and minerals from soil by roots.
Select the incorrect match from:
1. A. Auxin- Regulates tropism
2. B. Abscisic acid- Promotes dormancy in seeds and buds
3. C. Cytokinin- Speeds ageing in leaves
4. D. Gibberellin- Promotes growth
In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level? Grass → Grasshopper → Frog → Snake → Hawk
(a) 5 k J (b) 50 k J (c) 500 k J (d) 5000 k J

Also See: Most Expected Questions for Half-Yearly Exams – Class 10 Maths

2-Mark Questions

Magnesium ribbon burns with a dazzling white flame when heated in air.
1. What happens to magnesium when it burns? Name the product formed.
2. Write the balanced chemical equation for the reaction.
Write one use of concave and convex mirrors with suitable reasons.
Why is a fuse always connected to the live wire in a domestic circuit?
What are the advantages of connecting devices in parallel in a household circuit?
Distinguish between biodegradable and non-biodegradable substances with examples.
State the role of bile juice in digestion even though it has no enzymes.
Why are forests called the “green lungs” of the Earth?
Write balanced equations for:
- Burning of hydrogen sulphide in air
- Reaction of barium chloride with zinc sulphate
How are alveoli designed to maximize the exchange of gases?
How does the nephron in the kidney contribute to excretion?

3-Mark Questions

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.
A wire of length 1 m and radius 0.01 cm has a resistance of 20 Ω. Calculate the resistivity of its material.
Differentiate between photosynthesis and respiration.
Explain the role of the diaphragm in breathing in humans.
What happens when a copper coin is placed in silver nitrate solution? Write the chemical reaction.
Give two reasons why acquired traits are not inherited.
Explain the process of rusting of iron. State two conditions necessary for rusting.
Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
1 g of solid sodium chloride is taken in a clean and dry test tube and 2 ml of conc. H2SO4 is added to it. If the gas evolved is tested first with dry and then with wet blue litmus paper, in which case will the litmus paper change its colour? Give reasons for your answer. What inference can be drawn about the nature of the evolved gas? Support your answer with chemical equation for the reaction.
Plants absorb nutrients from the soil along with water, which are required for their growth. Explain how these nutrients are transported to different parts of the plant.
1. Which tissue is responsible for the transport of water and nutrients?
2. What is the role of transpiration in the movement of water and minerals?

Also See: Half-Yearly Exams vs Pre-Boards – What’s the Difference & What Matters More?

5-Mark / Long Answer Questions

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.
Draw a labelled circuit diagram of the circuit used to show the variation of potential difference across the ends of a resistor with current flowing through it. If you use this circuit, what relationship would you find between the voltmeter reading, V, and the ammeter reading, I?
A wire of a given material has a length L and an area of cross-section A. It has a resistance of 5 Ω. Find the resistance of another wire of the same material having length L/3 and area of cross-section 3A.
Explain with the help of a diagram the phenomenon of dispersion of white light by a glass prism. Why do different colours deviate differently?
Draw and label the human excretory system. State two vital functions of kidneys.
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.
Describe the role of platelets in blood clotting. What would happen if platelets were absent?
Compare exothermic and endothermic reactions with suitable examples.
A student is performing an experiment using a concave mirror to focus light. He places an object at different distances from the mirror and observes the position and nature of the image formed. When the object is placed far from the mirror, he notices a smaller, inverted image close to the focus. However, as he brings the object closer to the mirror, the image becomes larger and eventually turns erect when the object is very close to the mirror. He also notices the importance of the mirror’s focal length in determining the position of the image.
Based on the above case, answer the following questions: (Attempt either subpart C or D)
1. What type of mirror is the student using in the experiment?
2. What is the nature of the image formed by this mirror when the object is placed beyond the center of curvature?
3. A concave mirror has a focal length of 20 cm. An object is placed 40 cm from the mirror. Use the mirror formula to determine the position and nature of the image formed. OR
4. Draw ray diagrams to show the nature of the image formed by a concave mirror when an object is placed (i) beyond the center of curvature, (ii) at twice the focal length

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Tips to Prepare Effectively

Prioritize NCERT First
- Most questions are directly or indirectly from the NCERT. Don’t skip solved examples, diagrams, and in-text questions.
Revise Chapter-wise Formulas and Equations
- Make a separate formula notebook for Physics.
- Write all important chemical equations in Chemistry.
Practice Sample Papers Under Timed Conditions
- At least 2–3 papers before exams.
- Helps with speed, time management, and confidence.
Focus on Diagrams and Labeling
- Biology diagrams (e.g., nephron, human excretory system) often carry easy marks.
- In Physics, ray diagrams must be neat and properly labelled.
Don’t Ignore 1–2 Mark Questions
- Definitions, laws, and differences are easy to score but often skipped by students.
- Make quick revision flashcards for these.
Analyse Previous Papers / Teacher’s Hints
- Teachers often repeat similar questions.
- Go through your class notes and highlight “important” parts.
Stay Consistent, Not Stressed
- Study daily in short, focused sessions.
- Take 5-minute breaks after 45–50 minutes to stay fresh.

Also See: Last 30 Days Plan for Class 10 Half-Yearly Exams – Subject-wise Guide

Also See: Chapter wise Important Questions & Answers

Last Piece of Advice

Half-yearly exams may seem like a challenge, but they’re actually your best opportunity to build a strong foundation for boards. Most of the questions are predictable and revolve around NCERT concepts, definitions, diagrams, and basic numericals.

If you stick to your syllabus, revise regularly, and practice the kind of expected questions listed above, you’ll find Science much easier to handle. Remember, half-yearlies are not about perfection, but about preparation.

Approach them with confidence, and use them as a chance to sharpen your concepts, improve your writing speed, and reduce exam fear. Stay calm, stay consistent, and success will follow.

All the best for your half-yearly exams!