RRB Technician Science Questions, Know the Section Wise Topics

Published on 3 October 2025 by
RRB Technician Science Questions

For candidates preparing for RRB Technician 2025, mastering the science section is crucial. The exam tests fundamental concepts from Physics, Chemistry, and Biology along with their practical applications, especially for technical posts. By focusing on high-yield topics and frequently asked questions, candidates can improve their chances of scoring well.

This guide provides a curated list of top 100 RRB Technician science questions with answers, along with strategies and tips based on past trends.

Importance of Science Questions in RRB Technician 2025

The key importance of RRB Technician science questions are given below for the exam aspirants:

  • Scoring Potential: Science questions are often straightforward, and scoring for candidates who revise concepts properly. It is also recommended to download an RRB Technician Science Questions PDF for last minute revision.
  • Conceptual Understanding: Many technical questions require basic science knowledge.
  • Time Management: Science questions can be solved quickly, saving time for more challenging technical questions.
  • Weightage: Usually, 15–20% of the CBT paper includes general science questions.

Section-wise Breakdown of Science Questions

The RRB Technician Exam Date 2025 is expected to be released soon for the applicants. To make preparation organized, questions are categorized under three main branches, with answers included.

H3: Physics (40 Questions Expected)

The focus areas of physics inlclude Mechanics, Heat, Light, Electricity, Magnetism, Modern Physics.

QuestionAnswer
1. What is the unit of force in SI units?Newton (N)
2. Newton’s second law formula?F = ma
3. Types of lenses and their uses?Convex (converging), Concave (diverging)
4. Formula for electrical resistance?R = V/I
5. Laws of reflection?Angle of incidence = Angle of reflection
6. Ohm’s law problem-solving?V = IR
7. Simple harmonic motion basics?Motion where restoring force ∝ displacement
8. Heat transfer methods?Conduction, Convection, Radiation
9. Magnetic field around a current-carrying conductor?B = μ₀I/2πr
10. Uses of semiconductors in electronics?Diodes, transistors, integrated circuits
11. Unit of work?Joule (J)
12. Formula for kinetic energy?KE = 1/2 mv²
13. Speed of light in vacuum?3 × 10⁸ m/s
14. Ohmic conductor definition?Follows Ohm’s law; V ∝ I
15. Power formula in electric circuit?P = VI
16. Law of conservation of energy?Energy cannot be created or destroyed
17. Acceleration due to gravity on Earth?9.8 m/s²
18. Formula for momentum?p = mv
19. Types of mechanical waves?Longitudinal and Transverse
20. Work done when force is perpendicular to displacement?Zero
21. Reflection of light?Light bounces off a surface
22. Refraction of light?Light bends entering a new medium
23. Sound requires what to travel?Medium (solid, liquid, gas)
24. Unit of frequency?Hertz (Hz)
25. Lens formula?1/f = 1/v – 1/u
26. Principle of superposition?Net effect = sum of individual effects
27. Unit of electric charge?Coulomb (C)
28. Coulomb’s law?F = kq₁q₂/r²
29. Types of energy?Kinetic, Potential, Thermal, Chemical, etc.
30. First law of thermodynamics?ΔU = Q – W
31. Second law of thermodynamics?Entropy of isolated system always increases
32. Types of mirrors?Plane, concave, convex
33. Formula for pressure?P = F/A
34. Buoyant force formula?B = ρVg
35. Types of forces?Gravitational, Electromagnetic, Nuclear, Frictional
36. Laws of motion?Newton’s three laws
37. Electric current unit?Ampere (A)
38. Ohm’s law unit for resistance?Ohm (Ω)
39. Work-energy theorem?Work done = change in kinetic energy
40. Unit of power?Watt (W)
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H3: Chemistry (30 Questions Expected)

Focus Areas: Periodic Table, Chemical Reactions, Acids-Bases, Metallurgy, Environmental Chemistry.

QuestionAnswer
1. Atomic number of oxygen?8
2. Chemical formula of common salt?NaCl
3. Difference between ionic and covalent bond?Ionic: transfer of electrons, Covalent: sharing of electrons
4. pH of neutral water?7
5. What is rusting of iron?Formation of Fe₂O₃ due to oxidation
6. Types of chemical reactions?Combination, Decomposition, Displacement, Double displacement, Redox
7. Law of conservation of mass?Mass of reactants = Mass of products
8. Alloy formation example?Brass = Copper + Zinc
9. Properties of acids?Sour taste, turns blue litmus red
10. Properties of bases?Bitter taste, turns red litmus blue
11. Common acids?HCl, H₂SO₄, HNO₃
12. Common bases?NaOH, KOH, Ca(OH)₂
13. Unit of concentration?Molarity (M)
14. Oxidizing agent definition?Substance that gains electrons
15. Reducing agent definition?Substance that loses electrons
16. Example of polymer?Polyethylene, Nylon
17. Gas produced in photosynthesis?Oxygen (O₂)
18. Law of constant proportions?Compound always has same proportion of elements
19. Symbol of gold?Au
20. Symbol of silver?Ag
21. Chemical formula of water?H₂O
22. Acid + Base → ?Salt + Water (Neutralization)
23. Chemical formula of baking soda?NaHCO₃
24. Periodic table groups?18 groups, 7 periods
25. Valency of hydrogen?1
26. Valency of oxygen?2
27. Atomic mass unit definition?1/12 mass of Carbon-12 atom
28. Example of exothermic reaction?Combustion of methane
29. Example of endothermic reaction?Photosynthesis
30. Greenhouse gases?CO₂, CH₄, N₂O

H3: Biology (30 Questions Expected)

Focus Areas: Human Body, Plants, Animals, Microbiology, Genetics, Environment.

QuestionAnswer
1. Function of red blood cells?Carry oxygen
2. Structure of DNA?Double helix
3. Major organs in human digestive system?Mouth, Esophagus, Stomach, Intestine
4. Photosynthesis equation?6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
5. Types of reproduction?Sexual and Asexual
6. Blood groups?A, B, AB, O
7. Function of mitochondria?Powerhouse of cell, produces energy (ATP)
8. Common bacterial diseases?Tuberculosis, Cholera
9. Common viral diseases?Influenza, COVID-19
10. Role of enzymes?Speed up biochemical reactions
11. Function of lungs?Exchange of oxygen and carbon dioxide
12. Function of kidneys?Filter blood and remove waste
13. Nervous system components?Brain, Spinal cord, Nerves
14. Photosynthetic pigment?Chlorophyll
15. Vaccine example?Polio, Hepatitis B
16. Types of muscles?Skeletal, Smooth, Cardiac
17. Nervous system division?Central and Peripheral
18. Example of unicellular organism?Amoeba, Paramecium
19. Example of multicellular organism?Human, Plants
20. Plant transport system?Xylem and Phloem
21. Hormone controlling blood sugar?Insulin
22. Function of red bone marrow?Produces blood cells
23. Basic genetics unit?Gene
24. Dominant trait example?Brown eyes over blue eyes
25. Recessive trait example?Blue eyes
26. Role of chloroplast?Photosynthesis site
27. Ecosystem components?Biotic and Abiotic factors

Tips to Prepare RRB Technician Science Questions

We have provided some important preparation tips for the candidates. Check out the details below:

  1. Focus on Fundamentals: Many questions are based on 10th and 12th standard science.
  2. Use Diagrams and Charts: Memorizing diagrams helps in understanding complex topics.
  3. Solve Previous Year Papers: Helps identify recurring questions and patterns.
  4. Practice MCQs Daily: 10–15 questions daily for each section keeps concepts fresh.
  5. Time Yourself: Science questions are meant to be quick; practice solving them in 15–20 seconds per question.
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Preparation Strategy for RRB Technician Exam

Candidates must have a solid preparation strategy to score well and qualify for the exam on the first attempt. Given below are the details:

StepActionTime Allocation
PhysicsRevise formulas, laws, and applications40%
ChemistryFocus on reactions, periodic table, and practical concepts30%
BiologyMemorize diagrams, human body, plants, and environment30%
Mock TestsSolve at least 2–3 full-length mocks per week2–3 hours each
RevisionRevise high-yield questions and previous mistakes30–45 minutes daily

High-Yield Science Topics for RRB Technician 2025

The high-yielding science topics for RRB Technician Exam are given below:

  • Physics: Newton’s laws, electricity, magnetism, optics, work-energy-power.
  • Chemistry: Atomic structure, chemical bonding, acids and bases, metallurgy, and everyday chemistry.
  • Biology: Human anatomy, plant physiology, microbiology, genetics, and diseases.
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Key Takeaways Summary

Summing up the article, we have mentioned the key points for the applicants. These points will be useful for the last minute revision:

  • RRB Technician science questions are scoring if concepts are clear.
  • Physics, Chemistry, and Biology questions together form roughly 100 questions in the expected syllabus.
  • Focus on past trends, high-yield topics, and practice to maximize marks.
  • Mock tests and previous year papers play a crucial role in understanding the difficulty level.
  • Proper time management ensures you can answer all science questions quickly and accurately.

Preparing for RRB Technician 2025 requires a balance of technical knowledge, mathematics, reasoning, and science. Science questions, although often simple, can be a fast-scoring section if approached strategically.

FAQs

Q.1 How many science questions are asked in RRB Technician 2025?

On average, 15–20% of the CBT paper consists of general science questions, which means around 20–25 questions can be expected in the exam

Q.2 What are the main topics covered under RRB Technician science questions?

The questions are mostly from Physics, Chemistry, and Biology (10th–12th level NCERT). Key areas include mechanics, electricity, optics, acids-bases, periodic table, human anatomy, plant physiology, and genetics.

Q.3 Are science questions in RRB Technician difficult?

Most science questions are easy to moderate in difficulty. Candidates who revise NCERT basics and previous year RRB Technician papers can solve them quickly.

Q.4 How should I prepare for RRB Technician science questions?

Revise class 10th and 12th science NCERTs.
Practice previous year RRB Technician questions.
Take daily quizzes of 10–15 science MCQs.
Focus more on Physics and Biology, as they carry higher weightage.

Q.5 Do science questions repeat in RRB Technician exams?

Yes, many questions are repeated with slight variations. Topics like Newton’s Laws, Ohm’s Law, photosynthesis, acids-bases, and human body systems appear frequently across different RRB Technician exams.