The JAC 10th Board Science examination is a crucial stage for students studying under the Jharkhand Academic Council. Science is a core subject in the Class 10 board exam, and objective questions play an important role in the final score. To help students prepare effectively, JAC 10th Board Science MCQ questions with answers are very useful for practice and revision
On this page, students will find JAC Class 10 Science MCQs prepared according to the latest syllabus and exam pattern prescribed by the Jharkhand Academic Council. These multiple-choice questions cover all three sections of Science Physics, Chemistry, and Biology. Each MCQ is written in simple and clear language so that students can easily understand the concepts.
Q1. Which change results in the formation of a new substance?
A) Melting of ice
B) Boiling of water
C) Rusting of iron
D) Cutting of paper
Q2. The image formed by a plane mirror is:
A) Real and inverted
B) Virtual and erect
C) Real and enlarged
D) Virtual and inverted
Q3. Which metal is highly reactive and stored in kerosene?
A) Iron
B) Copper
C) Sodium
D) Aluminium
Q4. Which tissue transports food in plants?
A) Xylem
B) Phloem
C) Cortex
D) Cambium
Q5. The SI unit of electric current is:
A) Volt
B) Ohm
C) Ampere
D) Watt
Q6. Which gas is released during photosynthesis?
A) Carbon dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Q7. Which part of the human eye controls the amount of light entering?
A) Retina
B) Cornea
C) Pupil
D) Optic nerve
Q8. Which acid is present in curd?
A) Citric acid
B) Acetic acid
C) Lactic acid
D) Tartaric acid
Q9. The tendency of a body to resist change in motion is called:
A) Velocity
B) Momentum
C) Inertia
D) Acceleration
Q10. Which blood cells help in clotting?
A) RBC
B) WBC
C) Platelets
D) Plasma
Q11. Which mirror is used as a rear-view mirror?
A) Concave
B) Convex
C) Plane
D) Cylindrical
Q12. The unit of power is:
A) Joule
B) Watt
C) Volt
D) Ohm
Q13. Which organ removes nitrogenous waste from blood?
A) Liver
B) Lungs
C) Kidney
D) Heart
Q14. Which process converts sugar into alcohol?
A) Respiration
B) Fermentation
C) Oxidation
D) Reduction
Q15. The basic unit of heredity is:
A) Cell
B) Chromosome
C) Gene
D) Tissue
Q16. Which source of energy is non-renewable?
A) Wind
B) Solar
C) Coal
D) Biogas
Q17. The movement of water in plants occurs through:
A) Phloem
B) Xylem
C) Epidermis
D) Root hair
Q18. Which device converts electrical energy into mechanical energy?
A) Generator
B) Battery
C) Motor
D) Transformer
Q19. Which substance is used to test starch?
A) Benedict solution
B) Iodine solution
C) Lime water
D) Litmus
Q20. Which gas turns lime water milky?
A) Oxygen
B) Hydrogen
C) Carbon dioxide
D) Nitrogen
Q21. The boiling point of water at sea level is:
A) 90°C
B) 95°C
C) 100°C
D) 110°C
Q22. Which part of the brain controls balance?
A) Cerebrum
B) Cerebellum
C) Medulla
D) Spinal cord
Q23. Which reaction releases heat energy?
A) Endothermic
B) Neutral
C) Exothermic
D) Decomposition
Q24. The unit of electric resistance is:
A) Ampere
B) Volt
C) Ohm
D) Watt
Q25. Which vitamin helps in blood clotting?
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin K
Q26. Which type of motion is seen in a rotating fan?
A) Linear motion
B) Circular motion
C) Oscillatory motion
D) Random motion
Q27. Which metal is the best conductor of electricity?
A) Copper
B) Iron
C) Aluminium
D) Silver
Q28. The process of loss of water from leaves is called:
A) Respiration
B) Transpiration
C) Absorption
D) Diffusion
Q29. Which part of a cell contains genetic material?
A) Cytoplasm
B) Cell wall
C) Nucleus
D) Vacuole
Q30. Which law states “Every action has an equal and opposite reaction”?
A) First law
B) Second law
C) Third law
D) Law of gravitation
Q31. Which substance is biodegradable?
A) Plastic
B) Glass
C) Vegetable waste
D) Metal can
Q32. The force that pulls objects toward Earth is:
A) Magnetic force
B) Frictional force
C) Gravitational force
D) Electrostatic force
Q33. Which mirror can form both real and virtual images?
A) Plane
B) Convex
C) Concave
D) Cylindrical
Q34. Which nutrient is mainly required for growth and repair?
A) Carbohydrates
B) Proteins
C) Fats
D) Vitamins
Q35. Which organ pumps blood throughout the body?
A) Lung
B) Kidney
C) Heart
D) Brain
Q36. Which type of lens is used to correct myopia?
A) Convex lens
B) Concave lens
C) Bifocal lens
D) Cylindrical lens
Q37. The speed of an object is constant but direction changes. This motion is:
A) Uniform motion
B) Non-uniform motion
C) Circular motion
D) Linear motion
Q38. Which gas is essential for respiration?
A) Nitrogen
B) Oxygen
C) Carbon dioxide
D) Hydrogen
Q39. Which metal forms rust?
A) Copper
B) Aluminium
C) Iron
D) Zinc
Q40. Which energy is stored in a stretched spring?
A) Kinetic energy
B) Heat energy
C) Potential energy
D) Electrical energy
ANSWERS:
1-C, 2-B, 3-C, 4-B, 5-C, 6-B, 7-C, 8-C, 9-C, 10-C,
11-B, 12-B, 13-C, 14-B, 15-C, 16-C, 17-B, 18-C, 19-B, 20-C,
21-C, 22-B, 23-C, 24-C, 25-D, 26-B, 27-D, 28-B, 29-C, 30-C,
31-C, 32-C, 33-C, 34-B, 35-C, 36-B, 37-C, 38-B, 39-C, 40-C
Practicing JAC 10th Science objective questions helps students improve speed, accuracy, and confidence. MCQs test conceptual understanding rather than rote learning, which makes them very important for board exams. Regular practice of MCQs also helps students identify weak areas and revise important topics before the examination.
JAC 10th Model Paper Solution
| JAC MODEL PAPER | SOLUTION |
|---|---|
| Jac model paper Science 10th 2026 English Medium | Click Here |
| Jac model paper Science 10th 2023 English Medium | Click Here |
| Jac model paper Science 10th 2022 English Medium | Click Here |
| Jac 10th Model Paper 2025 Science in Hindi medium | Click here |
Important links
| JAC 10th Model Paper Solution | Click Here |
| JAC 10th Model Paper 2026 | Click Here |
| JAC 12th Model Paper 2026 | Click Here |