SSC GD General Science Notes

AI Summary (Quick Overview)

• What is this post? This is a simple, complete guide for SSC GD General Science Notes.
• What to study? We cover Biology (Vitamins, Human Body), Physics (Units, Inventions), and Chemistry (Formulas, pH Values).
• Is Science tough? No. For SSC GD, you only need basic “Everyday Science” knowledge (Class 10th level).
• Bonus: You can download the full SSC GD General Science Notes PDF at the bottom of this page.

Why are SSC GD General Science Notes Important?

Are you preparing for the SSC GD Constable exam? Many students focus only on Math and Reasoning. They ignore General Science. This is a big mistake!

In the General Knowledge (GK) section, you will get 3 to 4 questions from Science. These are “free marks” because the questions are very direct. If you know the answer, you can tick it in 2 seconds.

But many students are scared of Science. They think, “I did not study Science in college, how will I pass?” Friends, do not worry. The SSC GD General Science Notes we have prepared are very simple. We have written them in everyday language. You don’t need to be a scientist to understand this.

In this post, we will cover the three parts of Science:

1. Biology (Study of Life) – Most Important
2. Physics (Study of Energy)
3. Chemistry (Study of Chemicals)

• Complete Theory (Biology, Physics, Chemistry).
• 100+ One-Liner Questions (Most Repeated).
• Scientific Instruments List.
• Periodic Table Basics.
• File Name: SSC_GD_General_Science_Notes_2026.pdf
• Size: 2 MB
• Language: Simple English
• Cost: FREE

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Part 1: Biology Notes (Most Scoring)

Biology is the most important part of SSC GD General Science Notes. Out of 4 science questions, 2 usually come from Biology.

1. Vitamins and Diseases (Must Memorize)

SSC loves to ask about Vitamins. You must remember three things: The Vitamin name, its Chemical Name, and the Disease caused if you don’t have it.

Vitamin	Chemical Name	Deficiency Disease (What happens if you lack it?)
Vitamin A	Retinol	Night Blindness (Cannot see well at night)
Vitamin B1	Thiamine	Beri-Beri (Weak muscles)
Vitamin C	Ascorbic Acid	Scurvy (Bleeding gums)
Vitamin D	Calciferol	Rickets (Soft bones in kids)
Vitamin E	Tocopherol	Sterility (Reproduction problems)
Vitamin K	Phylloq uinone	No Blood Clotting (Blood doesn’t stop flowing)

Tip: Vitamin B and C are water-soluble (they dissolve in water). Vitamin A, D, E, K are fat-soluble.

2. The Human Body (Amazing Facts)

You should know the basic facts about your own body.

• Largest Bone: Femur (Thigh bone).
• Smallest Bone: Stapes (Inside the Ear).
• Largest Gland: Liver.
• Master Gland: Pituitary Gland (in the brain).
• Powerhouse of Cell: Mitochondria (Gives energy).
• Suicide Bag of Cell: Lysosome.
• Universal Donor: Blood Group O- (Can give blood to anyone).
• Universal Receiver: Blood Group AB+ (Can take blood from anyone).

3. Human Diseases

• Virus Diseases: Common Cold, Polio, Dengue, AIDS, Rabies, COVID-19.
• Bacteria Diseases: Typhoid, Tuberculosis (TB), Cholera, Plague.
• Protozoa Diseases: Malaria (spread by Mosquito).

Part 2: Physics Notes (Formulas & Units)

Physics in SSC GD is very basic. You don’t need to solve big numerical problems. Just focus on Units and Inventions in these SSC GD General Science Notes.

1. SI Units (How we measure things)

Just like we measure milk in Liters, we measure other things in specific units.

Quantity	SI Unit	Symbol
Force	Newton	N
Energy / Work	Joule	J
Power	Watt	W
Frequency	Hertz	Hz
Pressure	Pascal	Pa
Resistance	Ohm	Ω
Sound Loudness	Decibel	dB
Distance (Space)	Light Year	(This is for distance, not time!)

2. Light and Sound

• Speed of Light: Light travels fastest in Vacuum (empty space). Speed: $$3 \times 10^8$$ m/s.
• Speed of Sound: Sound travels fastest in Solids (Steel). Sound cannot travel in a vacuum.
• Myopia: Near-sightedness (Can see near, cannot see far). Corrected by Concave Lens.
• Hypermetropia: Far-sightedness (Can see far, cannot see near). Corrected by Convex Lens.

3. Important Inventions

• Bulb: Thomas Alva Edison.
• Telephone: Alexander Graham Bell.
• Radio: G. Marconi.
• X-Ray: Roentgen.
• Television (TV): J.L. Baird.
• Computer: Charles Babbage.

Part 3: Chemistry Notes (Chemicals in Daily Life)

Chemistry questions in SSC GD are about things we use in our kitchen or daily life.

1. Common Chemical Names (Very Important)

SSC often asks, “What is the chemical name of Salt?”. Memorize this table from our SSC GD General Science Notes.

Common Name	Chemical Name	Formula
Common Salt	Sodium Chloride	NaCl
Baking Soda	Sodium Bicarbonate	NaHCO₃
Washing Soda	Sodium Carbonate	Na₂CO₃
Vinegar	Acetic Acid	CH₃COOH
Laughing Gas	Nitrous Oxide	N₂O
Bleaching Powder	Calcium Oxychloride	CaOCl₂
Dry Ice	Solid Carbon Dioxide	CO₂

2. pH Values (Acid or Base?)

The pH scale tells us if a liquid is Acidic or Basic. The scale is from 0 to 14.

• pH 7: Neutral (Pure Water).
• pH less than 7: Acidic (Lemon, Vinegar).
• pH more than 7: Basic (Soap, Baking Soda).
• pH of Human Blood: 7.4 (Slightly Basic).
• pH of Lemon Juice: 2.2 to 2.4.

3. Metals and Non-Metals

• Lightest Metal: Lithium.
• Heaviest Metal: Osmium.
• Liquid Metal: Mercury (used in thermometers).
• Liquid Non-Metal: Bromine.
• Hardest Substance: Diamond (It is a form of Carbon).

How to Study SSC GD General Science Notes?

You might feel there is too much to remember. Don’t worry. Follow this simple plan:

1. Focus on Biology First: Start with Vitamins and Human Body. This covers 50% of the syllabus.
2. Make Charts: Write the “SI Units” and “Chemical Names” on a piece of paper. Stick it on your wall. Read it every morning.
3. Relate to Life: When you eat a lemon, think “This has Citric Acid and Vitamin C”. When you see a bulb, think “Edison made this”.
4. Practice Previous Papers: Solve the General Science questions from SSC GD 2023 and 2024 papers. Questions are often repeated.

Frequently Asked Questions (FAQ)

Conclusion

Friends, do not skip General Science. It is a very scoring subject. If you spend just 30 minutes daily on these SSC GD General Science Notes, you can easily score full marks in this section.

Remember, every single mark helps you get a better rank. Start with the “Vitamins” table today!

All the best for your SSC GD preparation! Jai Hind!

Disclaimer: These notes are for educational purposes. Please check the official SSC syllabus for any updates. For more Notes visit Universityscope.com