General Knowledge: Science, Literature & Economics

Nayantara Sahgal, an Indian novelist and political commentator, wrote this book focusing on themes of democracy, freedom, and resistance to authoritarianism. She comes from the Nehru-Gandhi family and often writes about political and social issues.

Geoffrey Chaucer is called the father of English poetry for his foundational work in the 14th century, especially 'The Canterbury Tales'. He established English as a legitimate literary language when Latin and French dominated literature, creating the framework for English poetry.

In the 2010-11 Union Budget, approximately 9 paise out of every rupee of total expenditure was allocated to various subsidies including food, fertilizer, and petroleum. This represented about 9% of government spending, highlighting the significant subsidy burden.

Interest rate policy is a core component of monetary policy, implemented by the central bank (RBI in India). It regulates borrowing costs to control money supply, inflation, and economic growth. Fiscal policy involves taxation and spending, not interest rates.

Leo Tolstoy, the renowned Russian novelist, wrote 'War and Peace' (1869), considered one of the greatest novels in world literature. It depicts Napoleon's invasion of Russia in 1812 and explores themes of war, peace, history, and human destiny.

Bankim Chandra Chattopadhyay wrote 'Anandmath' in 1882, a novel that greatly inspired the Indian independence movement. The book contains 'Vande Mataram', written by Bankim himself, which later became India's national song and a freedom struggle anthem.

Public sector refers to enterprises and organizations owned, controlled, and managed by the government in various sectors of the economy including commerce, trade, and industry. These organizations serve public interest and welfare rather than profit maximization.

Laughing gas is the common name for nitrous oxide (N2O), so called because it induces laughter and euphoria when inhaled. It was discovered by Joseph Priestley in 1772 and Humphry Davy later investigated its recreational effects. Today, it's widely used as an anesthetic in dentistry and medicine, and as a propellant in whipped cream dispensers.

Actinides are the 15 metallic elements with atomic numbers from 89 (actinium) to 103 (lawrencium). They are all radioactive and include uranium and plutonium, the well-known nuclear fuel elements. The lanthanides (atomic numbers 57-71) are sometimes called 'rare earth elements' and share similar chemical properties with actinides.

Silicon and germanium are semiconductors - they have electrical conductivity between conductors and insulators, which can be controlled by doping. This property makes them ideal for transistors, the fundamental building blocks of modern electronics. Silicon dominates the industry due to its abundance and excellent oxide (SiO2) properties, while germanium was used in early transistors.

Tungsten has the highest melting point of all metals (3422°C) and excellent strength at high temperatures, making it ideal for light bulb filaments. When electric current passes through, the filament glows white-hot without melting. Nichrome is used in heating elements, graphite in pencils and electrodes, and iron lacks the necessary heat resistance.

Diamond and graphite are both pure carbon allotropes - same element, different atomic arrangements. In diamond, each carbon atom bonds tetrahedrally to four others in a rigid 3D lattice, making it the hardest natural substance. Graphite has layered hexagonal sheets with weak interlayer forces, making it soft and slippery - ideal for pencil lead.

Different metal salts produce characteristic flame colors in fireworks: barium compounds give green, strontium gives red, copper gives blue, and sodium gives intense yellow. This occurs because the metal atoms absorb energy and release it as specific wavelengths of visible light. Mercury and potassium don't produce green flames in this context.

Permanent hardness is caused by dissolved calcium and magnesium sulfates/chlorides that can't be removed by boiling. Washing soda (sodium carbonate) softens water by precipitating these ions as insoluble carbonates. Chlorine and bleaching powder are disinfectants, while potassium permanganate is an oxidizing agent - none remove hardness.

Marsh gas is methane (CH4), named because it bubbles up from marshes and swamps where anaerobic bacteria decompose organic matter. It's the simplest alkane and major component of natural gas (70-90%). Methane is colorless, odorless (though commercial gas has added scent), and highly flammable - this characteristic 'will-o'-the-wisp' phenomenon inspired folklore.

LPG (liquefied petroleum gas) is primarily propane (C3H8) and butane (C4H10), which liquefy under moderate pressure. Methane requires much higher pressure to liquefy and is the main component of CNG (compressed natural gas), not LPG. Hexane (C6H14) and nonane (C9H20) are liquid at room temperature and not used in LPG.

Air is a homogeneous mixture of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%), and trace gases. A compound consists of chemically bonded elements in fixed proportions, while an element contains only one type of atom. Air's composition varies slightly with location and altitude, confirming it's a mixture, not a compound.

Vanity means excessive pride or self-admiration. Humility is the direct opposite - a modest view of one's importance. Pride, conceit, and ostentatiousness are all synonyms or related to vanity, not antonyms.

An epilogue is a section at the end of a literary work that provides closure or reflection. A prelude is an introduction or opening section - the direct opposite. Dialogue and post script are not structural opposites, and an epigram is a brief witty statement.

Capacious means spacious, roomy, or having a lot of capacity. Limited means restricted or having little capacity - the direct opposite. Caring, foolish, and changeable are unrelated to spatial capacity.