Table of Contents

• Introduction

• Detailed General Science Theory

  • Physics

  • Chemistry

  • Biology

• Exam Weightage and Trend

• Shortcuts and Tricks

• Summary Notes

• 25 Practice MCQs with Answers

• FAQs

• SEO Meta Data

• Internal Linking Suggestions

• Image Prompt + Alt Text

RRB NTPC General Science Notes PDF 2025 | Physics, Chemistry, Biology

Introduction

General Science plays a vital role in the RRB NTPC exam because it checks how well a student understands the world around them. Questions come from Physics, Chemistry, and Biology, and they are simple but concept based. A strong foundation in science helps students score higher in the General Awareness section and boosts overall performance.

This guide provides fully original, exam focused, easy to revise science notes for RRB NTPC. These notes follow a simple style so that learners at all levels can understand and move forward with confidence. Every section is written to support aspirants preparing for RRB NTPC 2025.

Primary Keyword: RRB NTPC General Science Notes
Secondary Keywords: RRB NTPC Physics, RRB NTPC Chemistry, RRB NTPC Biology

Detailed Theory Notes

Physics Notes for RRB NTPC

Physics explains natural laws. In the exam, most questions are based on simple concepts.

Motion

Motion is the change in position of a body with time.
Speed = Distance divided by Time
Velocity tells both speed and direction.
Acceleration is the rate of change of velocity.

Example: A train moving with a constant speed is in uniform motion.

Work, Energy, and Power

Work is done when a force moves an object.
Energy is the capacity to do work.
Power is the rate of doing work.

Important concepts:

• Kinetic energy

• Potential energy

• Law of conservation of energy

Light

Light travels in straight lines and moves fastest in vacuum.
Important topics include reflection, refraction, lenses, and optical instruments.

Examples:

• A convex lens focuses light

• A concave lens spreads light

Sound

Sound is a mechanical wave.
It needs a medium to travel.
Human hearing range is from 20 Hz to 20000 Hz.

Electricity

Electricity is the flow of electrons.
Current is measured in ampere.
Voltage is measured in volt.
Resistance is measured in ohm.

Important formula: V = I multiplied by R

Magnetism

Magnets attract iron, cobalt, and nickel.
The Earth acts like a giant magnet.
Opposite poles attract while similar poles repel.

Chemistry Notes for RRB NTPC

Chemistry deals with matter and its changes.

Matter

Matter exists in three states

• Solid

• Liquid

• Gas

Diffusion happens fastest in gases.

Elements and Compounds

An element has only one type of atom.
A compound forms when two or more elements combine chemically.

Acids, Bases, and Salts

Acids taste sour and turn blue litmus red.
Bases turn red litmus blue and feel soapy.
Salts form when an acid reacts with a base.

Examples

• HCl is an acid

• NaOH is a base

• NaCl is a salt

Metals and Non metals

Metals conduct heat and electricity. They are shiny and can be stretched.
Non metals are poor conductors and often dull.

Everyday Chemistry

• LPG is mainly butane

• Vinegar contains acetic acid

• Milk turns sour due to lactic acid

• Rusting happens due to reaction with oxygen and moisture

Biology Notes for RRB NTPC

Biology explains living organisms.

Cell

The cell is the basic unit of life.
Plant cells have a cell wall and chloroplasts.
Animal cells do not have a cell wall.

Human Body Systems

• Circulatory system

• Respiratory system

• Digestive system

• Nervous system

• Reproductive system

Nutrition

Carbohydrates provide energy.
Proteins help in growth.
Fats store energy.
Vitamins and minerals support functions.

Diseases and Vaccines

Diseases can be caused by bacteria, viruses, protozoa, or fungi.
Vaccines prepare the body to fight infections.

Plants

Plants make food through photosynthesis.
Chlorophyll helps absorb sunlight.
Plants give oxygen.

Genetics

Genes carry traits from parents to children.
DNA stores genetic information.

Exam Weightage and Trend

General Science usually has 20 to 25 percent weightage in RRB NTPC.

Shortcuts and Tricks

• Remember formulas with short mnemonics

• Link chemistry concepts with real life

• Draw simple diagrams for biology

• Practice goal based revision

• Solve past trend style questions

• Revise daily in small sessions

Summary Notes (Quick Revision)

• Motion is change of position with time

• Speed depends on distance and time

• Electricity uses voltage, current, resistance

• Metals conduct heat and electricity

• Acids turn blue litmus red

• Cells form the basic structure of life

• Vitamins keep the body healthy

• Photosynthesis makes food in plants

• Genes carry hereditary traits

Practice MCQs for RRB NTPC General Science

Q1. What is the SI unit of force?
A) Watt
B) Newton
C) Joule
D) Pascal
Answer: B
Newton is the SI unit of force.

Q2. Which gas is used in LPG?
A) Methane
B) Butane
C) Oxygen
D) Hydrogen
Answer: B

Q3. Which lens converges light?
A) Concave
B) Planar
C) Convex
D) Cylindrical
Answer: C

Q4. The human heart has how many chambers?
A) Two
B) Three
C) Four
D) Five
Answer: C

Q5. Which element is a non metal?
A) Iron
B) Copper
C) Sulphur
D) Aluminium
Answer: C

Q6. Which acid is present in vinegar?
A) Citric acid
B) Acetic acid
C) Formic acid
D) Tartaric acid
Answer: B

Q7. DNA is found in which part of the cell?
A) Cytoplasm
B) Nucleus
C) Ribosome
D) Vacuole
Answer: B

Q8. Rust is formed due to reaction with
A) Oxygen and moisture
B) Nitrogen
C) Carbon dioxide
D) Chlorine
Answer: A

Q9. Sound needs which medium to travel?
A) Vacuum
B) Medium
C) Heat
D) Radiation
Answer: B

Q10. Chlorophyll helps in
A) Respiration
B) Digestion
C) Photosynthesis
D) Reproduction
Answer: C

Q11. Which vitamin is also known as ascorbic acid?
A) A
B) B
C) C
D) D
Answer: C

Q12. The smallest unit of life is
A) Tissue
B) Cell
C) Organ
D) Organ system
Answer: B

Q13. The process of conversion of water to vapor is
A) Condensation
B) Evaporation
C) Freezing
D) Fusion
Answer: B

Q14. Blood is pumped by the
A) Lungs
B) Heart
C) Kidneys
D) Liver
Answer: B

Q15. Metals are good conductors of
A) Heat
B) Sound
C) Light
D) Cold
Answer: A

Q16. The lens of the eye is
A) Concave
B) Convex
C) Biconcave
D) Plane
Answer: B

Q17. Plants take carbon dioxide through
A) Roots
B) Stomata
C) Flowers
D) Fruit
Answer: B

Q18. The unit of electric current is
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: B

Q19. Which of the following is a virus caused disease?
A) Malaria
B) Tuberculosis
C) Influenza
D) Cholera
Answer: C

Q20. Carbohydrates mainly give
A) Energy
B) Strength
C) Protection
D) Warmth
Answer: A

Q21. The outermost layer of a plant cell is
A) Cell membrane
B) Cell wall
C) Plasma
D) Cytoplasm
Answer: B

Q22. Light travels fastest in
A) Water
B) Air
C) Glass
D) Vacuum
Answer: D

Q23. Which is a noble gas?
A) Neon
B) Sodium
C) Calcium
D) Aluminium
Answer: A

Q24. Photosynthesis produces
A) Oxygen
B) Nitrogen
C) Argon
D) Sulphur
Answer: A

Q25. The process of respiration uses
A) Carbon dioxide
B) Oxygen
C) Helium
D) Xenon
Answer: B

FAQs

Q1. What are the important topics in RRB NTPC General Science?
Physics, Chemistry, and Biology basics form the core topics.

Q2. How many questions come from General Science in RRB NTPC?
Nearly twenty questions.

Q3. What is the difficulty level?
Easy to moderate.

Q4. Are NCERT books needed?
Notes provided here are enough for smart revision.

Q5. How to prepare fast?
Read short notes daily and practice MCQs.