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GK Sphere, KOLKATA (2026)

08/06/2026

🫀🧠 HUMAN BODY ORGANS & THEIR FUNCTIONS – QUICK REVISION NOTES 📚✨

The human body is an amazing biological system where every organ performs a specific function to keep us healthy and alive. Understanding the major organs and their roles is essential for General Science, Biology, and Competitive Exam preparation.

🔍 Important Organ Nicknames
🧠 Brain – Control Center / Thinking Organ
🫀 Heart – Powerhouse of Blood Circulation
🫁 Lungs – Breathing Organ
🩸 Spleen – Blood Bank
🛡️ Lymph Nodes – Defence Organ
🧪 Liver – Chemical Factory & Detox Organ
🫘 Kidneys – Blood Purifier
🍽️ Stomach – Acid Factory
👂 Ears – Hearing & Balance Organ
👅 Tongue – Taste Organ
👃 Nose – Smell Organ
👶 Uterus – Baby House
🥚 Ovaries – Egg Factories

✨ Amazing Human Body Facts
✅ The brain uses about 20% of the body's energy.
✅ The heart beats nearly 100,000 times every day.
✅ The liver is the only major organ that can regenerate itself.
✅ The small intestine is about 6 meters (20 feet) long.
✅ Lungs help exchange oxygen and carbon dioxide continuously.

📚 Important for UPSC, SSC, WBCS, Railway, Banking, PSC, NEET, Nursing, Paramedical, School & College Exams.

📌 WB SPECIAL | GK SPHERE

🧠🫀🫁📚✨🇮🇳

08/06/2026

✅RRB Group-D CCAA Case Final Order Expected Tomorrow🤞🏻

08/06/2026

🏛️🇮🇳 IMPORTANT ORGANISATIONS OF INDIA – KNOW THE INSTITUTIONS THAT POWER THE NATION

India's growth, governance, security, education, finance, science, and infrastructure are driven by various constitutional, statutory, regulatory, and research organizations. Understanding these institutions is essential for competitive exams and general awareness.

✨ Important Organisations Covered
🔹 ISRO – Indian Space Research Organisation
🔹 DRDO – Defence Research & Development Organisation
🔹 RBI – Reserve Bank of India
🔹 SEBI – Securities and Exchange Board of India
🔹 NABARD – National Bank for Agriculture & Rural Development
🔹 SIDBI – Small Industries Development Bank of India
🔹 UIDAI – Unique Identification Authority of India
🔹 TRAI – Telecom Regulatory Authority of India
🔹 FSSAI – Food Safety and Standards Authority of India
🔹 NCERT – National Council of Educational Research and Training
🔹 ASI – Archaeological Survey of India
🔹 NIA – National Investigation Agency

📚 Why Are These Important?
✅ Maintain governance and regulation
✅ Promote economic growth and development
✅ Strengthen national security and defence
✅ Ensure food safety and quality standards
✅ Advance education, science, and technology
✅ Protect citizens' interests and rights

🌟 Quick Facts
📍 New Delhi hosts the headquarters of many major national institutions.
🚀 ISRO was founded by Dr. Vikram Sarabhai.
⚛️ BARC was established by Dr. Homi J. Bhabha.
🏦 RBI is India's central banking institution.
🛰️ ISRO's achievements include Chandrayaan, Mangalyaan, and Aditya-L1 missions.

🎯 Important for UPSC, SSC, WBCS, Banking, Railway, CDS, NDA, PSC, and all Competitive Examinations.

📌 WB SPECIAL | GK SPHERE

🇮🇳📚🏛️🚀

08/06/2026

☿️🔬 MERCURY (Hg) – THE LIQUID SILVER OF CHEMISTRY ⚠️

Mercury is a unique metal known for being the only metal that remains liquid at room temperature. Due to its distinctive properties, it has been widely used in scientific instruments, dentistry, and industry. However, it is also highly toxic and must be handled with extreme care.

✨ Key Facts About Mercury
🔹 Chemical Symbol: Hg
🔹 Atomic Number: 80
🔹 Also Known As: Quicksilver / Liquid Silver
🔹 Remains liquid at room temperature
🔹 Boiling Point: 357°C
🔹 One of the least reactive metals

🧪 Important Information
✅ Forms amalgams with many metals
✅ Symbol "Hg" comes from Hydrargyrum (Greek: Liquid Silver)
✅ Used in thermometers, barometers & laboratory instruments
✅ Mercury Sulphide (HgS) is known as Vermilion (Cinnabar) – a red pigment

⚠️ Safety Alert
🔸 Mercury and its vapors are highly toxic
🔸 Can damage the nervous system, kidneys, and lungs
🔸 Exposure should be avoided and handled only with proper precautions

📚 Common Mercury Compounds
🔹 HgO – Mercuric Oxide
🔹 HgCl₂ – Mercuric Chloride
🔹 Hg₂Cl₂ – Calomel
🔹 HgS – Mercuric Sulphide (Cinnabar)

🎯 Important for School Exams, Board Exams, NEET, JEE, UPSC, SSC, Railway, Banking, PSC & Other Competitive Exams.

📌 WB SPECIAL | GK SPHERE

☿️🔬📚⚠️

08/06/2026

⚗️🔬 ZINC (Zn) – THE RUST PROTECTOR & ESSENTIAL TRACE ELEMENT 🛡️

Zinc is one of the most important industrial and biological metals. From protecting iron from rust to supporting the human immune system, Zinc plays a vital role in our daily lives and modern industries.

✨ Key Facts About Zinc
🔹 Chemical Symbol: Zn
🔹 Atomic Number: 30
🔹 Main Ore: Sphalerite (ZnS)
🔹 Bluish-white transition metal
🔹 Essential for immunity, growth & enzyme activity

🧪 Important Reactions
✅ Zn + HCl → Hydrogen Gas (H₂)
✅ Zn + CuSO₄ → ZnSO₄ + Cu (Displacement Reaction)
✅ Zinc Oxide (ZnO) is an Amphoteric Oxide and is known as "Philosopher's Wool" or "Chinese White"

🏭 Major Uses of Zinc
✔️ Galvanization of Iron & Steel
✔️ Manufacture of Brass and Other Alloys
✔️ Batteries (Zinc-Carbon Cells)
✔️ Medicines, Ointments & Paints
✔️ Roofing Sheets and Industrial Products

🔩 Important Zinc Alloys
🔸 Brass = Copper + Zinc
🔸 Nickel Silver = Copper + Zinc + Nickel
🔸 Duralumin = Aluminium + Copper + Zinc + Magnesium
🔸 Gunmetal = Copper + Tin + Zinc
🔸 Zamak = Zinc + Aluminium + Magnesium + Copper

📚 Important for School Exams, Board Exams, NEET, JEE, SSC, Railway, Banking, PSC, UPSC and Other Competitive Exams.

📌 WB SPECIAL | GK SPHERE

⚗️🔬📚🛡️

08/06/2026

📚🇮🇳 IMPORTANT ORGANIZATIONS & MOVEMENTS IN INDIAN HISTORY

India’s journey towards social reform, religious awakening, and political freedom was shaped by numerous organizations and movements led by visionary leaders. From Raja Ram Mohan Roy’s Brahmo Samaj to Subhas Chandra Bose’s Forward Bloc, these movements played a vital role in building modern India.

✨ Key Organizations & Leaders
🔹 Brahmo Samaj – Raja Ram Mohan Roy
🔹 Arya Samaj – Swami Dayanand Saraswati
🔹 Ramakrishna Mission – Swami Vivekananda
🔹 Theosophical Society – Annie Besant
🔹 Satya Shodhak Samaj – Jyotirao Phule
🔹 RSS – Dr. K.B. Hedgewar
🔹 Swaraj Party – Motilal Nehru & C.R. Das
🔹 Forward Bloc – Subhas Chandra Bose
🔹 Indian National Army (INA) – Rash Behari Bose & Netaji Subhas Chandra Bose
🔹 Scheduled Caste Federation – Dr. B.R. Ambedkar

🌟 Why Are These Important?
✅ Promoted social and religious reforms
✅ Fought against social evils and discrimination
✅ Strengthened national consciousness
✅ Contributed to India's freedom struggle
✅ Shaped modern India's political and social framework

📖 A must-know topic for UPSC, WBCS, SSC, Railway, Banking, CDS, NDA, PSC and all competitive examinations.

📌 WB SPECIAL | GK SPHERE

🇮🇳📚✨

08/06/2026

🏆⚽🏏 SPORTS CHAMPIONS & FIFA WORLD CUP 2026 UPDATE 🌍

From cricket and football to tennis and badminton, the sporting world has witnessed thrilling performances and memorable champions. Stay updated with the latest winners, major tournaments, and key facts about the upcoming FIFA World Cup 2026!

✨ Major Champions
🏏 U-19 Men's Cricket World Cup – India 🇮🇳
🏏 IPL 2026 – Royal Challengers Bengaluru (RCB) 🔴
🏏 WPL 2026 – Royal Challengers Bengaluru (RCB) 🔴
🏆 Ranji Trophy 2025-26 – Jammu & Kashmir
⚽ Indian Super League – East Bengal
⚽ Santosh Trophy – Services
🎾 Australian Open Men's Singles – Carlos Alcaraz 🇪🇸
🎾 Australian Open Women's Singles – Elena Rybakina 🇰🇿
🏸 Thomas Cup – China 🇨🇳
🏸 Uber Cup – South Korea 🇰🇷

🌎 FIFA World Cup 2026 Highlights
✅ Host Nations: USA 🇺🇸 | Mexico 🇲🇽 | Canada 🇨🇦
✅ Total Teams: 48 (Largest FIFA World Cup Ever)
✅ Opening Venue: Estadio Azteca, Mexico City
✅ Final Venue: MetLife Stadium, USA
✅ Global Celebration of Football & Unity

📚 Perfect for Current Affairs, UPSC, SSC, Banking, Railway, WBCS, PSC and Sports GK Preparation.

📌 WB SPECIAL | GK SPHERE

🏆⚽🏏🌍🇮🇳

08/06/2026

🏹🌿 MOVEMENTS LED BY TRIBAL LEADERS IN INDIA 🇮🇳

India's tribal communities played a crucial role in resisting colonial rule, defending their land, culture, traditions, and rights against British exploitation. From the forests of Bastar to the hills of Northeast India, these courageous leaders inspired generations with their bravery and sacrifice.

✨ Key Tribal Movements & Leaders
🔹 Tilka Manjhi – Manjhi Revolt (1785)
🔹 Govind Guru – Bhagat Movement (1883)
🔹 Gunda Dhur – Bastar Rebellion (1910)
🔹 Sidhu & Kanhu Murmu – Santhal Hul (1855–57)
🔹 Budhu Bhagat – Kol Rebellion (1832)
🔹 Jatra Bhagat – Tana Bhagat Movement (1920–21)
🔹 Veer Surendra Sai – Sambalpur Rebellion (1857)
🔹 Alluri Sitarama Raju – Koya/Rampa Movement
🔹 Tirot Sing – Khasi Rebellion (1833)
🔹 Haipou Jadonang – Naga Nationalist Movement

📚 Why These Movements Matter?
✅ Defended tribal rights, land, and identity
✅ Challenged British oppression and exploitation
✅ Inspired India's freedom struggle
✅ Preserved indigenous culture and traditions
✅ Important for UPSC, SSC, PSC, Railway & other competitive exams

🌟 The history of India's freedom movement is incomplete without remembering the sacrifices of tribal heroes who fought fearlessly for justice and self-rule.

📌 WB SPECIAL | GK SPHERE

🇮🇳📖🔥

08/06/2026

🏹🔥 TRIBAL & REGIONAL REBELLIONS AGAINST BRITISH RULE IN INDIA 🇮🇳

Before the Revolt of 1857, numerous tribal and regional communities bravely challenged British exploitation, unjust taxation, land alienation, and interference in their traditional way of life. These uprisings became important milestones in India's long struggle for freedom.

✨ Key Rebellions Covered:
🔹 Santhal Revolt (1855–56) – Led by Sidhu & Kanhu Murmu
🔹 Munda Ulgulan (1899–1900) – Led by Birsa Munda
🔹 Kol Revolt (1831–32) – Led by Budhu Bhagat
🔹 Bhil Revolt (1818–31) – Resistance against British interference
🔹 Khasi-Jaintia Revolt (1829–33) – Led by U Tirot Sing
🔹 Garo Revolt (1829–32) – Tribal resistance in Meghalaya
🔹 Rampa Revolt (1879–80) – Led by Alluri Sitarama Raju
🔹 Paika Rebellion (1817) – Led by Bakhshi Jagabandhu
🔹 Heraka Movement – Led by Rani Gaidinliu, the fearless tribal freedom fighter of Northeast India

🌟 Did You Know?
👉 The Munda Rebellion is also known as Ulgulan (The Great Tumult).
👉 Rani Gaidinliu joined the freedom movement at the age of just 13 and was honored with the title "Rani" by Jawaharlal Nehru.
👉 The Paika Rebellion of 1817 is considered one of the earliest organized armed uprisings against British rule.

📚 Essential for UPSC, SSC, WBCS, PSC, Railway, Banking, CDS, NDA and other Competitive Exams.

📌 WB SPECIAL | GK SPHERE

🇮🇳📖🔥

08/06/2026

🏺📜 12 Major Harappan Sites of the Indus Valley Civilization (IVC) 🌍

Explore the fascinating world of the Indus Valley Civilization, one of the world's earliest urban civilizations. From the advanced water management system of Dholavira to the famous dockyard of Lothal, these archaeological sites reveal the brilliance of ancient Indian civilization.

✨ Highlights:
🔹 Mohenjo-daro – Mound of the Dead
🔹 Harappa – Gateway City of IVC
🔹 Lothal – Port City / Manchester of IVC
🔹 Dholavira – Water Management City
🔹 Rakhigarhi – Largest Harappan Site in India
🔹 Surkotada – Horse Site of IVC
🔹 Ropar – First Harappan Site Discovered/Excavated in Independent India (1953)

📚 Key Features:
✅ Planned Cities & Drainage System
✅ Standardized Weights & Measures
✅ Long-Distance Trade Network
✅ Bead Manufacturing & Craftsmanship
✅ Advanced Urban Planning
✅ Rich Cultural Heritage

🎯 Essential for UPSC, SSC, PSC, Railway, CDS, NDA, Banking & Other Competitive Exams.

📌 WB SPECIAL | GK SPHERE

🏺📖🇮🇳

GK Sphere

08/06/2026

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