BPSC TRE Science Questions: 40 Must-Know MCQs for Class 9-10
40 practice MCQs on Physics, Chemistry and Biology for BPSC TRE 4.0 Class 9-10 Science, with answers and one-line explanations.
BPSC TRE science questions for Class 9-10 cover Physics, Chemistry and Biology topics from the secondary-level NCERT and Bihar Board syllabus, testing concepts such as force and motion, atomic structure, acids and bases, photosynthesis and the human body. This post lists 40 must-know BPSC TRE science questions with answers and one-line explanations, split evenly across the three subjects, so you can check your concept clarity before attempting the written exam. Once you finish, start with the free mock test to see how you score under exam conditions.
BPSC TRE 4.0 Science (Class 9-10): Quick Exam Overview
Before you attempt the BPSC TRE science questions below, here is what is officially confirmed about the BPSC TRE 4.0 (Class 9-10) Science exam as of 30 October 2026.
| Detail | Information |
|---|---|
| Exam | BPSC TRE 4.0 (Class 9-10) Science, under the parent BPSC TRE 4.0 recruitment |
| Vacancies | 32,388 posts, as listed under TRE 4.0 on the official BPSC Exam Calendar |
| Application fee payment last date | 02 November 2026, as per the official notification |
| Final online submission last date | 03 November 2026 (extended), as per the official notification |
| Exam date | Not yet announced; the official exam calendar states it will be published after the advertisement period ends |
| Admit card, answer key, result | Not announced yet |
| Medium | Hindi and English |
For the detailed topic-wise breakup, see the BPSC TRE Science syllabus for Class 9-10, and check the full BPSC TRE 4.0 Class 9-10 Science exam page for exam details and linked resources. You can also track official dates on the BPSC Exam Calendar and read the official notice on the extended application dates.
BPSC TRE Science Questions: 40 MCQs (Physics, Chemistry, Biology)
These BPSC TRE science questions are written at the secondary (Class 9-10) level, matching the standard most candidates are tested on. Each question is followed by four options, the correct answer and a one-line explanation.
Physics MCQs for BPSC TRE Class 9-10 Science
- What is the SI unit of force?
- Joule
- Newton
- Watt
- Pascal
Answer: Newton. Force is mass times acceleration, and its SI unit is the newton (N).
- Newton's third law states that:
- Objects at rest stay at rest
- Force equals mass times acceleration
- Every action has an equal and opposite reaction
- Gravity attracts all objects equally
Answer: Every action has an equal and opposite reaction. This is the statement of Newton's third law of motion.
- A lever works on the principle of:
- Conservation of energy
- Balancing of moments (torque)
- Pascal's law
- Archimedes' principle
Answer: Balancing of moments. A lever is balanced when the clockwise moment equals the anticlockwise moment about the fulcrum.
- The speed of light in vacuum is approximately:
- 3 × 108 m/s
- 3 × 106 m/s
- 3 × 105 km/s
- Both a and c
Answer: Both a and c. 3 × 108 m/s is the same value as 3 × 105 km/s, just in different units.
- The SI unit of electric current is:
- Volt
- Ampere
- Ohm
- Coulomb
Answer: Ampere. Current is measured in amperes, a base SI unit.
- Which mirror is commonly used as a vehicle's rear-view mirror?
- Concave mirror
- Convex mirror
- Plane mirror
- Cylindrical mirror
Answer: Convex mirror. It gives a wider field of view with a virtual, erect and diminished image.
- Splitting of white light into seven colours is called:
- Reflection
- Refraction
- Dispersion
- Diffraction
Answer: Dispersion. Different wavelengths of light bend by different amounts, separating the colours.
- Ohm's law relates which three quantities?
- Voltage, current, resistance
- Voltage, current, power
- Current, resistance, power
- Voltage, resistance, power
Answer: Voltage, current, resistance. Ohm's law states V = IR at constant temperature.
- The SI unit of electrical power is:
- Joule
- Watt
- Ampere
- Ohm
Answer: Watt. Power is energy used per second, i.e., one joule per second.
- A concave lens is used to correct which eye defect?
- Hypermetropia
- Myopia
- Astigmatism
- Cataract
Answer: Myopia. A concave lens diverges light rays so the image forms correctly on the retina in short-sightedness.
- The force of attraction between the Earth and an object is called:
- Magnetic force
- Gravitational force
- Electrostatic force
- Nuclear force
Answer: Gravitational force. This is the force that pulls objects towards the Earth's centre.
- Which of the following is a vector quantity?
- Mass
- Speed
- Displacement
- Energy
Answer: Displacement. It has both magnitude and direction, unlike mass, speed or energy.
- The SI unit of frequency is:
- Hertz
- Second
- Metre
- Joule
Answer: Hertz. Frequency is measured in hertz, meaning cycles per second.
- Sound cannot travel through:
- Solids
- Liquids
- Gases
- Vacuum
Answer: Vacuum. Sound is a mechanical wave and needs a material medium to travel.
Chemistry MCQs for BPSC TRE Class 9-10 Science
- The atomic number of an element represents the number of:
- Neutrons
- Protons
- Protons and neutrons
- Electrons and neutrons
Answer: Protons. Atomic number equals the number of protons in the nucleus.
- Which gas is commonly known as laughing gas?
- Carbon dioxide
- Nitrous oxide
- Ammonia
- Methane
Answer: Nitrous oxide (N2O). It is used as a mild anaesthetic and has a euphoric effect.
- The pH of a neutral solution at 25°C is:
- 0
- 7
- 14
- 1
Answer: 7. A pH of 7 is neutral; below 7 is acidic and above 7 is basic.
- Which of the following is a chemical change?
- Melting of ice
- Rusting of iron
- Cutting of paper
- Dissolving of salt in water
Answer: Rusting of iron. It forms a new substance, iron oxide, unlike the other reversible physical changes.
- The chemical formula of baking soda is:
- Na2CO3
- NaHCO3
- NaOH
- CaCO3
Answer: NaHCO3. Baking soda is sodium bicarbonate.
- Which subatomic particle carries no charge?
- Proton
- Electron
- Neutron
- Ion
Answer: Neutron. Neutrons are electrically neutral particles in the nucleus.
- Which of these is a noble gas?
- Nitrogen
- Oxygen
- Helium
- Hydrogen
Answer: Helium. Noble gases like helium have a complete outer electron shell, making them chemically inert.
- Direct conversion of a solid into vapour without becoming liquid is called:
- Evaporation
- Condensation
- Sublimation
- Deposition
Answer: Sublimation. Substances like camphor and naphthalene sublime directly from solid to gas.
- Which acid is present in vinegar?
- Citric acid
- Acetic acid
- Sulfuric acid
- Lactic acid
Answer: Acetic acid. Vinegar is a dilute solution of acetic (ethanoic) acid.
- Rusting of iron is an example of which chemical process?
- Reduction
- Oxidation
- Sublimation
- Neutralisation
Answer: Oxidation. Iron reacts with oxygen and moisture in air to form iron oxide (rust).
- Which metal is liquid at room temperature?
- Sodium
- Mercury
- Iron
- Zinc
Answer: Mercury. It is the only metal that stays liquid at ordinary room temperature.
- The chemical name of common salt is:
- Calcium carbonate
- Sodium chloride
- Sodium bicarbonate
- Potassium nitrate
Answer: Sodium chloride. Common salt is NaCl, formed from sodium and chlorine ions.
- Bleaching powder is chemically known as:
- Calcium hydroxide
- Calcium oxychloride
- Calcium carbonate
- Calcium sulfate
Answer: Calcium oxychloride. It is used as a disinfectant and bleaching agent, written as CaOCl2.
Biology MCQs for BPSC TRE Class 9-10 Science
- The basic structural and functional unit of life is the:
- Tissue
- Cell
- Organ
- Nucleus
Answer: Cell. Every living organism is made up of one or more cells.
- Photosynthesis mainly occurs in which part of a plant?
- Roots
- Stem
- Leaves
- Flower
Answer: Leaves. Leaves contain chlorophyll in chloroplasts, where photosynthesis takes place.
- Which organ is primarily responsible for pumping blood in the human body?
- Liver
- Heart
- Lungs
- Kidney
Answer: Heart. The heart pumps blood through the circulatory system.
- Which blood cells help in the clotting of blood?
- Red blood cells
- White blood cells
- Platelets
- Plasma
Answer: Platelets. Platelets clump together at a wound site to form a clot and stop bleeding.
- Loss of water vapour from plant leaves is called:
- Respiration
- Transpiration
- Photosynthesis
- Excretion
Answer: Transpiration. It is the evaporation of water through stomata on leaves.
- Which cell organelle is called the powerhouse of the cell?
- Nucleus
- Mitochondria
- Ribosome
- Golgi body
Answer: Mitochondria. It is the site of aerobic respiration, producing most of the cell's ATP (energy).
- The hormone insulin is secreted by the:
- Liver
- Pancreas
- Thyroid
- Pituitary gland
Answer: Pancreas. Insulin, secreted by the pancreas, regulates blood sugar levels.
- Which of the following is a major function of the kidney?
- Digestion
- Respiration
- Excretion
- Circulation
Answer: Excretion. Kidneys filter blood and remove waste as urine.
- DNA is mainly found in the:
- Cytoplasm
- Nucleus
- Cell membrane
- Vacuole
Answer: Nucleus. The nucleus houses most of a cell's DNA, organised into chromosomes.
- Deficiency of which vitamin causes night blindness?
- Vitamin B
- Vitamin A
- Vitamin C
- Vitamin D
Answer: Vitamin A. It is essential for the pigment in the eye's retina that enables vision in dim light.
- The study of heredity and variation is called:
- Ecology
- Genetics
- Taxonomy
- Physiology
Answer: Genetics. Genetics studies how traits are passed from parents to offspring.
- Which gas do plants absorb from the atmosphere for photosynthesis?
- Oxygen
- Carbon dioxide
- Nitrogen
- Hydrogen
Answer: Carbon dioxide. Plants use CO2, water and sunlight to make glucose during photosynthesis.
- Which part of the human brain controls balance and coordination?
- Cerebrum
- Cerebellum
- Medulla
- Spinal cord
Answer: Cerebellum. The cerebellum coordinates muscle movement and maintains body balance.
How to Prepare for the BPSC TRE Science Exam (Class 9-10)
Scoring well on BPSC TRE science questions comes down to three habits: revising NCERT and Bihar Board Class 9-10 concepts chapter by chapter, solving MCQs daily to spot weak topics early, and timing yourself so you can finish within the exam duration once the pattern is officially released. Keep a short error log of the questions you get wrong above and revisit them weekly until the explanation feels obvious.
If you are unsure which chapters carry more weight, the BPSC TRE Science syllabus for Class 9-10 breaks down topics and weightage subject-wise. Candidates preparing for the Class 9-10 cadre can also look at the BPSC TRE 4.0 Social Science syllabus if applying for that subject too, and students revising from the Bihar Board angle will find the Bihar Board Class 10 Science objective questions useful for extra practice.
BPSC TRE Science Mock Test Series: Practice More Questions
Forty questions are a good starting point, but the real exam will test far more topics across Physics, Chemistry and Biology. The BPSC TRE 4.0 Science (Class 9-10) Mock Test Series has 90 full tests with 3,206 questions, available in Hindi and English with detailed solutions, at an affordable price of ₹49. Start with the free mock test before deciding to buy the full series, so you know exactly what to expect on exam day.
BPSC TRE 4.0 Science Exam: Current Status
As per the official BPSC Exam Calendar, TRE 4.0's application and fee-payment window has been extended, with fee payment due by 02 November 2026 and final online submission by 03 November 2026. The Commission has not yet announced the PT/written exam date — the official calendar states this will be published only after the advertisement period ends. No admit card, answer key or result has been released. Keep checking the BPSC TRE 4.0 Class 9-10 Science exam page for updates as they are confirmed officially.
Frequently Asked Questions
What is the BPSC TRE 4.0 (Class 9-10) Science exam?
It is part of BPSC TRE 4.0, the recruitment drive for school teachers, and covers 32,388 posts across Classes 1-12 as listed on the official BPSC Exam Calendar, with the Class 9-10 Science cadre testing secondary-level Physics, Chemistry and Biology.
What topics do BPSC TRE science questions usually cover?
They cover secondary-level (Class 9-10) Physics, Chemistry and Biology topics based on the NCERT and Bihar Board syllabus, including force and motion, atomic structure, acids and bases, and the human body. See the BPSC TRE Science syllabus for Class 9-10 for the full topic-wise list.
When is the BPSC TRE 4.0 exam date?
The exam date has not been announced yet. As per the official BPSC Exam Calendar, the PT/written exam date will be published only after the advertisement period is completed.
What is the last date to apply for BPSC TRE 4.0?
As per the official notification dated 26 October 2026, the fee-payment deadline is 02 November 2026 and the final online submission deadline (extended) is 03 November 2026.
How can I practise more BPSC TRE science questions?
You can practise with the BPSC TRE 4.0 Science (Class 9-10) Mock Test Series, which has 90 tests and 3,206 questions with solutions. Start with the free mock test to try it before buying the full series.
Ready to test what you've learned? Start with the free mock test now, and if it helps, move on to the full BPSC TRE 4.0 Science Mock Test Series for complete Class 9-10 Physics, Chemistry and Biology practice.
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