GK: Class 12 General Q&A · Page 35
3,658 free answers on GK (General) for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
Gravitational Force
Gravitational force is the attractive force that exists between any two objects with mass, one of the four fundamental forces of nature (along with electromagnetic, strong nuclear, and weak nuclear forces). Described by Newton's Law of Universal Gravitation, the force is proportional to the product of the two masses and inversely proportional to the square of the distance between them, expressed mathematically as: F = G(m₁m₂)/r², where F is gravitational force, G is the gravitational con
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Indian Constitution Articles
The Indian Constitution contains 395 articles (originally, though amendments have added more) organized into 22 parts, along with 12 schedules, making it one of the world's longest and most detailed written constitutions. These articles cover all aspects of governance, rights, duties, governmental structure, center-state relations, and countless other provisions establishing India's constitutional framework. Rather than listing all articles, I'll highlight key articles that are particularly s
- GeneralClass 12All
Largest Airport in India
Indira Gandhi International Airport (IGI Airport) in Delhi is currently India's largest and busiest airport by passenger traffic, handling over 70 million passengers annually (pre-COVID levels), though Rajiv Gandhi International Airport in Hyderabad and Chhatrapati Shivaji Maharaj International Airport in Mumbai are also major hubs handling 20+ million passengers each. If measuring by area, Rajiv Gandhi International Airport in Hyderabad covers approximately 5,500 acres, making it one of Indi
- GeneralClass 12All
Contour Ploughing
Contour ploughing (or contour farming) is a soil conservation agricultural practice where ploughing, planting, and cultivating are done along the contour lines of sloped land rather than up and down the slope. Contour lines are imaginary lines connecting points of equal elevation, so farming along contours means working across the slope at consistent elevation. This practice creates natural barriers to water flow, with each furrow and ridge running horizontally across the slope, significantly
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Adolescence Definition
Adolescence is the transitional developmental period between childhood and adulthood, characterized by significant physical, psychological, emotional, and social changes, typically spanning from approximately 10-12 years (onset of puberty) to 18-21 years (achievement of relative psychological and social maturity), though exact boundaries vary by culture, individual development, and definition purposes. The World Health Organization defines adolescence as ages 10-19, while other frameworks ext
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Tincture of Iodine
Tincture of iodine is an antiseptic solution containing iodine (2-7%, typically 2-3% in over-the-counter preparations) dissolved in alcohol (ethanol) along with potassium iodide or sodium iodide, creating a dark brown liquid used for disinfecting skin before surgeries, treating minor wounds and cuts, and preventing infection. The typical formulation contains: 2% iodine (I₂), 2.4% potassium iodide (KI), and 46% ethanol (alcohol), with the remainder being water. The potassium iodide helps iodin
- GeneralClass 12All
When and How Bismillah Khan Get His Big Break
Ustad Bismillah Khan (1916-2006), India's legendary shehnai maestro, got his big break in 1937 when he performed at the All India Music Conference in Allahabad (now Prayagraj), where his extraordinary talent on the shehnai was recognized nationally for the first time, bringing him prominence beyond his local performances in Varanasi. However, his most significant breakthrough came on August 15, 1947, when he had the historic honor of playing the shehnai from the Red Fort in Delhi during India
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3E Meaning in Train
In Indian Railways reservation system, 3E refers to Third AC Economy class, a relatively new category introduced to provide air-conditioned travel at prices more affordable than regular 3AC (Third AC) class, positioned between 3AC and Sleeper class in terms of both amenities and pricing. 3E coaches feature similar berth arrangements to 3AC (side berths and bay arrangements with eight berths per bay), but with some modifications to accommodate more passengers, making tickets approximately 10-1
- GeneralClass 12All
Cos 60
The value of cos 60° (or cos π/3 radians) equals 1/2 or 0.5. This is one of the standard trigonometric values that students memorize along with other important angles like 0°, 30°, 45°, 90°, and 180°. Understanding why cos 60° = 1/2 can be demonstrated using an equilateral triangle or the unit circle. In an equilateral triangle with side length 2, if you draw an altitude from one vertex to the opposite side, it bisects that side, creating two right triangles wit
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Mangal Pandey Belong to Which Regiment
Mangal Pandey belonged to the 34th Bengal Native Infantry (BNI) regiment of the British East India Company's army, stationed at Barrackpore (now Barrackpur) near Calcutta (now Kolkata). He was a sepoy (soldier) in this regiment and became a pivotal figure in Indian history when on March 29, 1857, he attacked British officers, an act of rebellion that is considered one of the sparks that ignited the 1857 Revolt (also called the First War of Independence or Sepoy Mutiny), though historians deba
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How Much CRP Level is Dangerous
CRP (C-Reactive Protein) is a substance produced by the liver in response to inflammation anywhere in the body, measured through a blood test as a marker for inflammation, infection, or cardiovascular disease risk. CRP levels are measured in milligrams per liter (mg/L), and interpretation depends on which CRP test is used and clinical context. For standard CRP tests measuring general inflammation: less than 3 mg/L is generally considered normal; 3-10 mg/L indicates moderate elevation suggesti
- GeneralClass 12All
One Billion is Equal to
One billion equals 100 crores in the Indian numbering system, 1,000 million in the international system, or 1,000,000,000 (one followed by nine zeros). This conversion is crucial for understanding global statistics, international financial reports, and economic data where large numbers are commonly expressed in billions rather than crores. The mathematical relationship: 1 billion = 1,000,000,000 = 1,00,00,00,000 (Indian notation with commas after thousands, then every two digits) = 100 crores
- GeneralClass 12All
Sec 30
The value of sec 30° (secant of 30 degrees) equals 2/√3 or (2√3)/3 after rationalization. Secant is a trigonometric function defined as the reciprocal of cosine: sec θ = 1/cos θ. Since cos 30° = √3/2, we have sec 30° = 1/(√3/2) = 2/√3. To rationalize (eliminate the radical from the denominator), multiply numerator and denominator by √3: (2/√3) × (√3/√3) = 2√3/3 ≈ 1.1547. Understanding secan
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Kiran is 24 Years Older than Rakesh
This is an age-related word problem commonly found in mathematics curricula and competitive exams. The complete problem likely continues with additional information and asks to find their current ages or ages at some future/past time. Without the full problem, I'll explain how to approach typical age problems of this type using algebraic methods that apply to various age-relationship questions. Age problems typically provide relationships between people's ages and ask to find specific
- GeneralClass 12All
How Many Countries in Asia
Asia contains 48 countries according to the United Nations classification, though the exact number can vary slightly (47-49) depending on how disputed territories and regions are classified. Asia is Earth's largest continent by both area (approximately 44.58 million square kilometers) and population (over 4.7 billion people, about 60% of global population), spanning from the Middle East in the west to Japan and Indonesia in the east, and from Russia in the north to Indonesia in the south. The
- GeneralClass 12All
What is the Mass of 10 Mole of Sodium Sulphite
To find the mass of 10 moles of sodium sulphite, we first need to determine its molecular formula and calculate its molar mass. Sodium sulphite has the chemical formula Na₂SO₃, containing 2 sodium atoms, 1 sulfur atom, and 3 oxygen atoms. The molar mass is calculated by adding the atomic masses: (2 × 23) + 32 + (3 × 16) = 46 + 32 + 48 = 126 grams per mole. Therefore, the mass of 10 moles of sodium sulphite = 10 × 126 = 1,260 grams or 1.26 kilograms. This calculation
- GeneralClass 12All
Equilateral Triangle
An equilateral triangle is a triangle where all three sides have equal length and all three interior angles are equal, each measuring 60 degrees (since the sum of angles in any triangle equals 180°, and 180° ÷ 3 = 60°). This special type of triangle possesses numerous symmetrical properties making it mathematically interesting and practically useful. An equilateral triangle has three lines of symmetry (each altitude/median/angle bisector serves as a mirror line), and rotati
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Cytoplasm
Cytoplasm is the gel-like substance inside cells, filling the space between the cell membrane (outer boundary) and the nucleus (in eukaryotic cells), or filling the entire interior in prokaryotic cells that lack a nucleus. Composed primarily of water (about 70-80%), along with dissolved proteins, ions, nutrients, and various organic molecules, cytoplasm provides the medium in which cellular organelles are suspended and where many metabolic reactions occur. In eukaryotic cells, cytoplasm speci
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Write the Unit of Work
The SI (International System of Units) unit of work is the joule (J), named after English physicist James Prescott Joule. One joule is defined as the work done when a force of one newton displaces an object by one meter in the direction of the force, mathematically: 1 J = 1 N·m (newton-meter). Since force is measured in newtons (N) and distance in meters (m), and work = force × displacement × cos(θ) where θ is the angle between force and displacement directions,
- GeneralClass 12All
A Man Left 25 of His Money
This appears to be an incomplete mathematical word problem, likely something like "A man left 25% of his money to..." or "A man left 2/5 of his money to..." Such problems test proportional reasoning, fraction/percentage calculations, and logical problem-solving skills. Without the complete problem, I'll explain how to approach typical inheritance or money distribution problems of this type. These problems usually provide: a person dividing money among beneficiaries (family members, ch