✅ Tripitaka (“Three Baskets”) is the sacred text of Buddhism. It contains Vinaya Pitaka (rules for monks), Sutta Pitaka (discourses of Buddha), and Abhidhamma Pitaka (philosophical analysis). It was written in Pali language.

✅ Bodh Gaya (Bihar) is where Siddhartha Gautama attained enlightenment under the Bodhi tree. He was born at Lumbini (Nepal), gave first sermon at Sarnath, and attained Mahaparinirvana at Kushinagar. All four are UNESCO World Heritage Sites.

✅ Samudragupta of the Gupta dynasty is called the “Napoleon of India” because of his military conquests across the subcontinent. He is described in the Allahabad Pillar Inscription, composed by his court poet Harisena.

✅ Ellora caves are located near Aurangabad, Maharashtra. They contain 34 cave temples representing Hindu, Buddhist, and Jain faiths (7th–11th century). The Kailasa Temple (Cave 16) was built by Rashtrakuta king Krishna I.

✅ Kautilya (Chanakya / Vishnugupta) wrote the Arthashastra, a comprehensive treatise on administration, economics, and military strategy. He was the Prime Minister of Chandragupta Maurya. It was rediscovered in 1905 by R. Shamasastry.

✅ The Konark Sun Temple in Odisha was built by Narasimhadeva I of the Eastern Ganga dynasty in the 13th century (around 1250 CE). It is a UNESCO World Heritage Site and is depicted on the Indian currency coin of 10 paise (old).

✅ “Satyameva Jayate” (Truth Alone Triumphs) is taken from the Mundaka Upanishad (3.1.6). It was adopted as India’s national motto on 26 January 1950. India’s State Emblem is adapted from the Lion Capital of Ashoka at Sarnath.

✅ Nalanda University was located in Bihar. It was a great Buddhist learning centre (5th–12th century CE), visited by Chinese pilgrims Fa-Hien and Hiuen Tsang. It was destroyed by Bakhtiyar Khalji. A new Nalanda University was reopened in 2014.

✅ Hiuen Tsang (Xuanzang) visited India during the reign of Harshavardhana (606–647 CE). He studied at Nalanda for 5 years. His travelogue “Si-Yu-Ki” (Record of Western Regions) is a vital historical source. Fa-Hien visited during Chandragupta II’s reign.

✅ Gautam Buddha propounded the Eight-Fold Path (Ashtangika Marga) as the way to end suffering (dukkha). It includes Right View, Right Intention, Right Speech, Right Action, Right Livelihood, Right Effort, Right Mindfulness, and Right Concentration.

✅ The Kailasa Temple (Cave 16) at Ellora was built by Rashtrakuta King Krishna I in the 8th century. It is the largest monolithic rock-cut structure in the world, carved entirely out of a single rock from top downwards.

✅ The Battle of Plassey (1757) was fought between the British East India Company (led by Robert Clive) and Siraj-ud-Daula, Nawab of Bengal. The battlefield is in present-day West Bengal. This battle laid the foundation of British rule in India.

✅ Tansen (Mia Tansen) was one of the nine jewels (Navaratnas) of Emperor Akbar’s court. He was a master of Hindustani classical music. Akbar gave him the title “Mian” (meaning ‘learned man’). He is also credited with popularizing the Dhrupad style.

✅ Amir Khusro is regarded as the father of Qawwali — the devotional Sufi music. He was a disciple of Sufi saint Nizamuddin Auliya. He is also credited with inventing the tabla and popularizing Khayal and Tarana styles of Hindustani music.

✅ The Permanent Settlement was introduced in 1793 by Lord Cornwallis. It fixed the land revenue to be paid by zamindars permanently to the British East India Company. It was applied to Bengal, Bihar, and Orissa and is also known as the Zamindari System.

✅ The Sati System was abolished in 1829 by Lord William Bentinck through Regulation XVII. This was largely influenced by social reformer Raja Ram Mohan Roy who campaigned vigorously against the practice. Bentinck also abolished Thuggee (1830).

✅ The first railway line in India ran between Bombay (Bori Bunder) and Thane, a distance of 34 km, on 16 April 1853. The first railway line in East India was Howrah-Hooghly (1854). The railway was expanded by Lord Dalhousie.

✅ The Indian National Congress (INC) was founded on 28 December 1885 in Bombay by A.O. Hume (a retired British civil servant). The first session was presided over by Womesh Chandra Bonerjee. It became the main political organization of the Indian independence movement.

✅ The Doctrine of Lapse was implemented by Lord Dalhousie. It stated that if a ruler died without a natural heir, the state would be annexed by the British. Satara (1848) was the first state to be annexed; Jhansi, Nagpur, Awadh etc. followed.

✅ The Quit India Movement was launched on 8 August 1942 at the Bombay session of the All India Congress Committee. Gandhi gave the “Do or Die” call. The British immediately arrested all major leaders including Gandhi, Nehru, and Patel.

✅ The INA (Azad Hind Fauj) had the motto “Ittehad, Itmad aur Qurbani” — meaning Unity, Faith and Sacrifice. Subhas Chandra Bose gave the famous slogan “Tum mujhe khoon do, main tumhe azadi dunga” (Give me blood, I will give you freedom). He was born in Cuttack, Odisha.

✅ Warren Hastings was the first Governor-General of Bengal/India (1773–1785). Lord Canning was the first Viceroy of India (from 1858, after the Company rule ended). Lord Cornwallis established the Civil Services and Permanent Settlement.

✅ The Tropic of Cancer passes through 8 Indian states: Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, and Mizoram. India’s standard time (IST) is based on 82.5°E longitude passing through Mirzapur, UP.

✅ Nanda Devi (7,817 m) in Uttarakhand is the highest peak located entirely within India. Kanchenjunga (8,586 m) is on the India-Nepal border. K2 is in Pakistan-administered territory. Nanda Devi is part of the Garhwal Himalayas.

✅ The Palk Strait separates Tamil Nadu (India) from the Mannar district of Sri Lanka. It connects the Bay of Bengal with the Gulf of Mannar. It is named after Robert Palk, Governor of Madras (1755–1763).

✅ Kolkata (formerly Calcutta) is known as the “City of Palaces” and “City of Joy” (from Dominique Lapierre’s book). It was the capital of British India until 1911. It is also called the “Cultural Capital of India.” It is situated on the Hooghly River.

✅ Marina Beach in Chennai (Tamil Nadu) is the longest beach in India (~13 km) and the second longest natural urban beach in the world (after Praia do Cassino, Brazil). It runs from Fort St. George in the north to Foreshore Estate in the south.

✅ Wular Lake in Bandipora district, Jammu & Kashmir, is the largest freshwater lake in India (area ~24 km across). Chilika Lake (Odisha) is the largest coastal lagoon/saltwater lake. Loktak (Manipur) is the largest freshwater lake in Northeast India.

✅ Kerala has the highest literacy rate in India at 94.0% (Census 2011), also highest female literacy at 92.1%. Bihar has the lowest overall literacy (61.8%). Kerala also has the highest sex ratio (1084 females per 1000 males).

✅ The term “Naxalites” comes from Naxalbari, a small village in West Bengal, where a peasant uprising was led by Charu Majumdar, Kanu Sanyal, and Jangal Santhal in 1967. It gave birth to the Naxalite communist movement in India.

✅ The minimum age to become the President of India is 35 years (Article 58). The President is elected indirectly by an Electoral College comprising elected members of Parliament and State Legislatures. The term is 5 years.

✅ The minimum age to be a member of Rajya Sabha is 30 years (Article 84). For Lok Sabha it is 25 years. For President it is 35 years. For Governor it is 35 years. For Prime Minister there is no specific constitutional age — only need to be a Member of Parliament.

✅ Lord Ripon is considered the Father of Local Self-Government in India. He introduced local self-government institutions in 1882. The 73rd and 74th Constitutional Amendments (1992) gave constitutional status to Panchayati Raj Institutions and Urban Local Bodies.

✅ The Constitution was adopted on 26 November 1949 (now celebrated as Constitution Day/Samvidhan Diwas), and came into effect on 26 January 1950 (Republic Day). The Constituent Assembly was chaired by Dr. Rajendra Prasad. B.R. Ambedkar was the chief architect.

✅ The 42nd Constitutional Amendment (1976) amended the Preamble, adding the words “Socialist,” “Secular,” and “Integrity.” India thus became a Sovereign, Socialist, Secular, Democratic Republic. This amendment was passed during Indira Gandhi’s Emergency period.

✅ Article 21A (inserted by 86th Amendment, 2002) provides the Right to Education as a Fundamental Right — free and compulsory education for children aged 6–14 years. The Right to Education Act (RTE) was enacted in 2009 to enforce this.

✅ The Election Commission of India is established under Article 324 of the Constitution. It is an independent constitutional body responsible for administering elections. The Chief Election Commissioner (CEC) cannot be removed except by a process like impeachment of Supreme Court judges.

✅ The Panchayati Raj system was first established in Rajasthan on 2 October 1959 at Nagaur, inaugurated by PM Jawaharlal Nehru. It was based on the Balwant Rai Mehta Committee (1957) recommendations, which suggested a 3-tier structure.

✅ The SI unit of electric current is Ampere (A). Volt is the unit of potential difference, Watt is the unit of power, and Ohm is the unit of electrical resistance. The fundamental SI units include metre (length), kilogram (mass), second (time), and ampere (current).

✅ Photosynthesis: 6CO₂ + 6H₂O + Sunlight → C₆H₁₂O₆ + 6O₂. Plants absorb Carbon Dioxide (CO₂) and release Oxygen during photosynthesis. Chlorophyll is the green pigment that traps sunlight. It takes place in the chloroplast of plant cells.

✅ Deficiency of Vitamin C (Ascorbic Acid) causes Scurvy (bleeding gums, weakness). Vitamin A deficiency → Night blindness; Vitamin D → Rickets; Vitamin B1 (Thiamine) → Beri-Beri; Vitamin B12 → Pernicious Anaemia; Iodine deficiency → Goitre.

✅ Diamond is the hardest naturally occurring substance, rating 10 on the Mohs hardness scale. It is an allotrope of carbon (pure carbon in crystal form). Graphite is another allotrope of carbon — but very soft. India (Panna, MP) has diamond mines.

✅ O negative (O−) blood group is the “Universal Donor” — it can be donated to any blood group. AB positive (AB+) is the “Universal Recipient” — it can receive blood from any group. Blood groups were discovered by Karl Landsteiner (ABO system, 1901), who won the Nobel Prize.

✅ CPU = Central Processing Unit — the brain of a computer. It has three parts: ALU (Arithmetic and Logic Unit), CU (Control Unit), and Registers. The speed of CPU is measured in GHz (Gigahertz). Modern computers have multi-core CPUs.

✅ HTTP = Hyper Text Transfer Protocol. It is the foundation of data communication on the World Wide Web. HTTPS (HyperText Transfer Protocol Secure) is the secure version using SSL/TLS encryption. URLs beginning with https:// are encrypted and safer.

✅ Verghese Kurien is the Father of the White Revolution / Operation Flood. He transformed India from a milk-deficient nation to the world’s largest milk producer through Operation Flood (Amul cooperative model, Anand, Gujarat). He is also called the “Milkman of India.”

✅ Rabindranath Tagore won the Nobel Prize in Literature in 1913 for his work “Gitanjali” — becoming the first Asian to receive a Nobel Prize. C.V. Raman won the Nobel Prize in Physics (1930). Amartya Sen won it in Economics (1998). Mother Teresa won Peace (1979).

✅ Visva-Bharati University in Santiniketan (Birbhum, WB) was founded by Rabindranath Tagore in 1921. It became a Central University in 1951. Tagore’s father Debendranath Tagore had earlier established an ashram at Santiniketan. It is a UNESCO World Heritage Site (2023).

✅ Darjeeling hill station is in Darjeeling district, West Bengal. The name comes from Tibetan “Dorje Ling” meaning “place of the thunderbolt.” It is famous for Darjeeling tea (GI tag), the Darjeeling Himalayan Railway (UNESCO World Heritage, 1999), and a view of Kanchenjunga.

✅ The Bharat Ratna was instituted on 2 January 1954 by President Dr. Rajendra Prasad. The first recipients were Dr. C. Radhakrishnan (later 2nd President), C. Rajagopalachari, and Dr. C.V. Raman. Sachin Tendulkar became the first sportsperson to receive it (2014).