General Science
📚 Master key facts, important dates, historical events, geographical features, and scientific discoveries that are crucial for competitive exams.
Important Facts
Study MaterialImportant Facts – General Science
General Science Important Facts help candidates quickly revise important concepts, discoveries, scientific terms, human body systems, inventions, and natural phenomena for competitive examinations.
These facts are highly useful for SSC, Railway, Banking, UPSC, Defence, State PSC, Insurance, and various government exams.
Physics Important Facts
| Topic | Important Fact |
|---|---|
| SI Unit of Force | Newton |
| SI Unit of Work | Joule |
| SI Unit of Power | Watt |
| Speed of Light | 3 × 108 m/s |
| Device used to measure temperature | Thermometer |
| Device used to measure current | Ammeter |
| Device used to measure voltage | Voltmeter |
| Unit of Electric Current | Ampere |
| Mirror used in vehicles | Convex Mirror |
| Sound cannot travel through | Vacuum |
Chemistry Important Facts
- Purest form of water → Distilled Water
- pH value of pure water → 7
- Most abundant gas in atmosphere → Nitrogen
- Gas essential for respiration → Oxygen
- Common salt chemical name → Sodium Chloride
- Vinegar contains → Acetic Acid
- LPG mainly contains → Butane
- Marsh gas → Methane
- Chemical formula of water → H2O
- Chemical formula of carbon dioxide → CO2
- Acid present in lemon → Citric Acid
- Acid present in curd → Lactic Acid
Biology Important Facts
| Topic | Important Fact |
|---|---|
| Largest organ in human body | Skin |
| Largest internal organ | Liver |
| Largest gland in human body | Liver |
| Smallest bone in human body | Stapes |
| Largest bone in human body | Femur |
| Normal human body temperature | 37°C |
| Blood purification organ | Kidney |
| Blood group discovered by | Karl Landsteiner |
| Father of Biology | Aristotle |
| Father of Genetics | Gregor Mendel |
Human Body Important Facts
- Heart has → Four Chambers
- Normal human heart beats → 72 times per minute
- Red blood cells are produced in → Bone Marrow
- Vitamin D helps in → Bone Strength
- Insulin is produced by → Pancreas
- Human body contains → 206 bones
- Universal blood donor → O Negative
- Universal blood recipient → AB Positive
- Vitamin C deficiency causes → Scurvy
- Vitamin D deficiency causes → Rickets
Environmental Science Facts
- Greenhouse gas mainly responsible for global warming → Carbon Dioxide
- Ozone layer protects from → Ultraviolet Rays
- Chipko Movement is related to → Forest Conservation
- Largest source of air pollution → Fossil Fuels
- Acid Rain is caused by → Sulphur Dioxide & Nitrogen Oxides
- Earth Day celebrated on → 22 April
- World Environment Day celebrated on → 5 June
Space Science Facts
| Topic | Important Fact |
|---|---|
| Nearest planet to Sun | Mercury |
| Largest planet | Jupiter |
| Red Planet | Mars |
| Earth’s natural satellite | Moon |
| First man on Moon | Neil Armstrong |
| First Indian in Space | Rakesh Sharma |
| ISRO Headquarters | Bengaluru |
| Planet known for rings | Saturn |
Scientific Instruments & Their Uses
- Barometer → Measures atmospheric pressure
- Hydrometer → Measures density of liquids
- Seismograph → Measures earthquake intensity
- Microscope → Magnifies small objects
- Telescope → Observes distant objects
- Speedometer → Measures speed of vehicle
- Lactometer → Measures purity of milk
Important Scientific Discoveries
| Scientist | Discovery |
|---|---|
| Isaac Newton | Law of Gravitation |
| Alexander Fleming | Penicillin |
| Thomas Edison | Electric Bulb |
| Galileo Galilei | Telescope Improvement |
| C. V. Raman | Raman Effect |
| Marie Curie | Radioactivity |
Most Important Topics Asked in Exams
- Human Body Systems
- Vitamins & Diseases
- Electricity & Magnetism
- Acids, Bases & Salts
- Space Science
- Scientific Instruments
- Important Discoveries
- Environmental Science
- Physics Units & Laws
- Chemical Formulas
Quick Revision Framework
Learn Basic Concepts
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Remember Scientific Facts
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Revise Formulas & Units
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Practice Science MCQs
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Revise Daily
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Improve Exam Accuracy
Final Takeaway
General Science Important Facts help candidates quickly revise scientific concepts, formulas, discoveries, inventions, and human body facts for competitive examinations.
Regular revision and practice of scientific facts improve memory retention, analytical understanding, and question-solving speed in General Knowledge and Science sections.