Static GK carries most of the General Knowledge marks in the defence exams, and science carries the largest share of it. In NDA & NA, Physics, Chemistry and General Science are about half of the 400 marks of Part B, and History, the freedom movement and Geography are about 20% each, as per the notice. In the CDS (II) 2026 General Knowledge paper, GK24 counted about 37 science questions, about 20 each on Polity and History, about 15 on Geography and environment and about 10 on the Economy; this count is guidance, not an official break-up. The Army's Agniveer CEE gives 15 of its 50 General Duty questions to General Knowledge and 15 to General Science, which covers cells, the human body, plants and animals and common epidemics. Its GK list names history, culture and geography of India and its neighbours, the Constitution, inventions and discoveries, books and authors, and the Indian Armed Forces. This page holds GK24's topic-wise GK notes and GK questions tagged for NDA, CDS and Agniveer, in English and Hindi: General Science, Indian History, Art and Culture, Indian Polity, Geography, Indian Economy and Static GK. Read one topic at a sitting, then solve its questions and the previous-year questions of your exam to see what stayed with you.
Buna-S, a synthetic rubber used in tyres, is a copolymer of
Buna-S, also called styrene-butadiene rubber, is made by copolymerising 1,3-butadiene with styrene; the S in the name stands for styrene.
Read the full explanation →Rayon is best described as
Rayon is made by dissolving the cellulose of wood pulp, forcing the solution through fine holes and regenerating the cellulose as a thread.
Read the full explanation →Which of the following is a thermoplastic?
Polyvinyl chloride has linear chains held to one another only by weak forces, so it softens when heated and hardens when cooled and can be melted and moulded again and again; that reversibility is what makes a plastic thermoplastic, and it is also what allows such plastics to be recycled…
Read the full explanation →Which substance is added to natural rubber during vulcanisation?
Vulcanisation is the heating of raw rubber with sulphur, which forms short cross-links between the long isoprene chains. Raw rubber is soft, sticky when warm and brittle when cold; the vulcanised product is strong, far more elastic and stable over a wide range of temperature.
Read the full explanation →Nylon-6,6 is obtained by the condensation polymerisation of
Nylon-6,6 is a polyamide formed when hexamethylenediamine condenses with adipic acid, with a molecule of water eliminated at each linkage; the name records that each monomer contributes a chain of six carbon atoms.
Read the full explanation →Teflon, used to coat non-stick cookware, is a polymer of
Teflon is polytetrafluoroethene, made by the addition polymerisation of tetrafluoroethene. The fluorine atoms shield the carbon chain so completely that the surface is chemically inert, water repellent and almost frictionless, and it holds its properties to high temperature, which is why it coats frying pans and is used for gaskets…
Read the full explanation →Which of the following is a thermosetting plastic?
Bakelite is made by condensing phenol with formaldehyde, and on moulding its chains join to one another by strong covalent cross-links into a single rigid network.
Read the full explanation →The monomer of polythene is
Polythene, also written polyethene, is formed by the addition polymerisation of ethene, in which the double bond of each molecule opens and the units join into a long chain with nothing eliminated.
Read the full explanation →Which one of the following is a natural polymer?
Silk is the protein fibroin, spun by the silkworm, so it is a polymer made by a living organism and is therefore natural, like cellulose, starch, wool and natural rubber.
Read the full explanation →Under Article 368, a Constitution Amendment Bill must be passed in each House by
The special majority of Article 368 has two parts that must be satisfied together: a majority of the total membership of the House, and a majority of not less than two-thirds of the members present and voting.
Read the full explanation →A Money Bill can be introduced in Parliament
Article 109 read with Article 117(1) allows a Money Bill to be introduced only in the Lok Sabha, and Article 110(1) permits its introduction only on the recommendation of the President; it is always a Government Bill moved by a minister.
Read the full explanation →On the dissolution of the Lok Sabha, which of the following Bills does NOT lapse?
The Rajya Sabha is a permanent House that is never dissolved, so a Bill that originated there and has not yet been passed by the Lok Sabha survives the dissolution of the Lok Sabha and remains alive in the Rajya Sabha.
Read the full explanation →Which of the following Bills cannot be returned by the President to Parliament for reconsideration?
A Money Bill is introduced in the Lok Sabha only on the recommendation of the President, so the government has already obtained the President's approval of the proposal; Article 111 therefore allows the President only to assent to it or to withhold assent, not to return it.
Read the full explanation →The power of the President to assent to a Bill, withhold assent, or return it for reconsideration is contained in which Article?
Once both Houses pass a Bill it is presented to the President, who may declare assent, declare that assent is withheld, which is the absolute veto, or return an ordinary Bill once with a message for reconsideration, which is the suspensive veto; if the Houses pass it again the President…
Read the full explanation →The first joint sitting of the two Houses of Indian Parliament, held in 1961, was summoned to pass which Bill?
The two Houses disagreed over its amendments, a joint sitting was summoned in 1961, and the Bill became the Dowry Prohibition Act, 1961.
Read the full explanation →A joint sitting of the two Houses of Parliament cannot be summoned for which of the following?
Article 368 requires each House to pass such a Bill separately by a special majority, and the Constitution provides no joint sitting for it; a Money Bill is also outside the scope of Article 108.
Read the full explanation →Who presides over a joint sitting of the two Houses of Parliament?
A joint sitting is summoned by the President but presided over by the Speaker of the Lok Sabha; if the Speaker is absent the Deputy Speaker presides, and in the absence of both the Deputy Chairman of the Rajya Sabha takes the chair.
Read the full explanation →A joint sitting of both Houses of Parliament to resolve a deadlock over a Bill is provided by which Article?
Article 108 allows the President to summon a joint sitting of the two Houses when the other House has rejected the Bill, when the Houses have finally disagreed on the amendments to be made, or when more than six months have passed without the other House passing it.
Read the full explanation →Within how many days must the Rajya Sabha return a Money Bill to the Lok Sabha?
Under Article 109 a Money Bill passed by the Lok Sabha is transmitted to the Rajya Sabha, which may only make recommendations and must return the Bill within fourteen days.
Read the full explanation →Whose certificate finally decides that a Bill is a Money Bill?
Article 110(3) says that if any question arises whether a Bill is a Money Bill, the decision of the Speaker of the Lok Sabha is final, and Article 110(4) requires the Speaker to endorse the certificate on the Bill when it is transmitted to the Rajya Sabha or sent for…
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