In the carbonate ion CO₃²⁻, the central carbon atom forms three sigma bonds with oxygen atoms and is involved in resonance structures with delocalized pi electrons.
This trigonal planar geometry requires sp² hybridization, with three hybrid orbitals arranged at 120° angles and one unhybridized p orbital for pi bonding.
Potassium hexacyanoferrate(III) contains both ionic bonds (between K⁺ and the [Fe(CN)₆]³⁻ complex) and covalent bonds (between Fe and CN ligands, and within the CN groups).
This complex salt is extensively used in coordination chemistry and analytical procedures like the Prussian blue test.
The balanced equation for this redox reaction in acidic medium is: 2KMnO₄ + 5H₂C₂O₄ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 10CO₂ + 8H₂O.
Potassium permanganate acts as an oxidizing agent (Mn⁷⁺ → Mn²⁺), while oxalic acid is oxidized (C²⁺ → C⁴⁺), giving the 2:5 molar ratio.
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale, making it the most electronegative element.
This is because it has the smallest atomic radius and the highest effective nuclear charge among all elements, causing it to attract electrons most strongly in a chemical bond.
The Treaty of Seringapatam (1792) was a peace agreement signed after the Third Anglo-Mysore War, and the question asks which Indian ruler was involved in this treaty.
Hyder Ali, the powerful ruler of Mysore, died in 1782. His son Tipu Sultan succeeded him and ruled Mysore from 1782 to 1799.
After his defeat by the British and their allies in the Third Anglo-Mysore War (1790-1792), Tipu Sultan was forced to negotiate peace terms with the British East India Company.
The Treaty of Seringapatam was signed in 1792 between Tipu Sultan (ruler of Mysore) and the British forces. This treaty ended the war and required Tipu Sultan to cede half of his territory and pay a large indemnity.
The Treaty of Seringapatam (1792) involved Tipu Sultan, who was the ruler of Mysore at that time and negotiated the peace agreement with the British after their military victory.
This question asks about who held the position of Governor-General of India immediately after the country gained independence on August 15, 1947.
Lord Louis Mountbatten served as the first Governor-General of free India from August 15, 1947 to June 21, 1948. He was appointed by the British Crown and continued in this ceremonial role during the crucial transition period after independence. After Mountbatten's departure, Dr. Rajagopalachari became the second Governor-General, making him the first Indian-born Governor-General, while Rajendra Prasad later became the first President of India under the new Constitution.
The correct answer is (A) Mountbatten, who was the first Governor-General of independent India.
This question asks about the meaning of an important administrative policy introduced by the Mughal Emperor Akbar.
Sulh-i-Kul was Akbar's policy of religious tolerance and peaceful coexistence among all communities in his empire. The term literally translates from Persian as "peace with all," reflecting Akbar's pragmatic approach to governing a religiously diverse population including Hindus, Muslims, Christians, and others. This policy abolished the jizya (tax on non-Muslims), appointed people based on merit regardless of religion, and promoted interfaith dialogue, making it fundamentally different from policies of religious persecution or division. By implementing Sulh-i-Kul, Akbar created a more stable and unified empire where people of different faiths could coexist peacefully under Mughal rule.
The correct answer is (B) Peace with all.
This question asks about the primary issue addressed during the Champaran Satyagraha movement led by Gandhi in 1917.
The Champaran Satyagraha was Gandhi's first major civil disobedience movement in India, focused on the exploitation of indigo farmers in the Champaran district of Bihar by European planters who forced peasants to grow indigo on their best lands while paying them minimal wages. The movement successfully brought national attention to the plight of these farmers and resulted in the British agreeing to compensate the exploited peasants and end the oppressive indigo cultivation system. This satyagraha established Gandhi as a national leader and demonstrated the power of non-violent resistance in addressing agrarian injustices.
The correct answer is (B) Indigo farming, as the Champaran Satyagraha was primarily a protest against the exploitative indigo farming practices imposed on peasants by European planters in Bihar.
This question asks about the historical figure responsible for constructing Fatehpur Sikri, a significant Mughal architectural complex in India.
Fatehpur Sikri was built by Emperor Akbar during the 16th century as his capital city, constructed between 1571-1585 in Agra, Uttar Pradesh. The city was named after the Sufi saint Salim Chishti, whose shrine Akbar visited seeking blessings for an heir, and it represents the pinnacle of Mughal architecture and urban planning under Akbar's reign. Although Akbar later shifted his capital to Lahore, Fatehpur Sikri remains a UNESCO World Heritage Site and testament to his architectural vision and administrative prowess.
The correct answer is (C) Akbar, who built Fatehpur Sikri as his imperial capital.
This question asks about the historical year when the Quit India Movement, a major nationalist campaign demanding British withdrawal from India, was launched.
The Quit India Movement was launched by Mahatma Gandhi on August 8, 1942, at the All-India Congress Committee session held in Mumbai. This movement called for an immediate end to British rule in India and became one of the most significant mass movements of the Indian independence struggle. The correct answer is (B) 1942.