Static general knowledge makes up about 90% of Part B of the NDA General Ability Test, about 360 of its 400 marks. The NDA & NA (II) 2026 notice divides it into five sections: Physics (about 25%), Chemistry (about 15%), General Science (about 10%), History, Freedom Movement etc. (about 20%) and Geography (about 20%). Half of Part B is science. Physics covers matter, motion, gravitation, heat, sound, light, magnetism, electricity and the working of everyday devices such as the siphon, pressure cooker, periscope and safety fuse. Chemistry covers changes of matter, elements and compounds, common gases, acids, bases and salts, carbon, fertilizers and the materials used to make soap, glass, cement and gunpowder. General Science covers cells, the human body, diseases, diet, the solar system and eminent scientists. Section D spans Indian history and culture, the freedom movement, the Constitution, Five Year Plans, Panchayati Raj and world history from the Renaissance to the Russian Revolution. Geography covers the Earth, rocks, oceans, the atmosphere and climate, and India's resources, industries, ports and trade. This page holds GK24's topic-wise GK notes for NDA, in English and Hindi, written as short facts and tables. Read a topic, then solve its quiz and previous-year questions on this site.
What is the number of atoms in 46 g of sodium-23 (N = Avogadro constant)?
The molar mass of sodium-23 is 23 g, so 46 g is exactly 2 moles, and 2 moles contain twice the Avogadro number of atoms.
Read the full explanation →In the reaction between hydrogen sulphate ion and water
HSO₄⁻ + H₂O → H₃O⁺ + SO₄²⁻
the water acts as
In this reaction water accepts a proton (H⁺) from the hydrogen sulphate ion and becomes the hydronium ion, H₃O⁺, and a proton acceptor is a base.
Read the full explanation →Which one of the following is a true fish as per the biological system of classification?
The flying fish is a bony fish with a backbone, gills, scales and fins, so it belongs to the class of fishes; it only glides over the water on its large, wing-like pectoral fins.
Read the full explanation →If the xylem of a plant is mechanically blocked, which of the following functions of the plant will be affected?
Xylem carries water together with the minerals dissolved in it from the roots to the stem and leaves, so blocking it stops both.
Read the full explanation →The United Nations has been observing International Day of Rural Women on
The UN General Assembly set aside 15 October as the International Day of Rural Women in December 2007, and it was first observed in 2008.
Read the full explanation →Which of the following statements relating to the Fifth Schedule of the Constitution of India is not correct?
The Fifth Schedule expressly gives the Governor this power. Under the Fifth Schedule, the Governor of a State with Scheduled Areas may make regulations for the peace and good government of those areas.
Read the full explanation →Who among the following Mongol leaders/commanders did not cross Indus to attack India?
In 1221 Chenghiz Khan chased the Khwarizmian prince Jalal-ud-din Mangbarni up to the Indus but turned back without crossing it.
Read the full explanation →Since 2014-15, India has consistently run trade surplus with which one among the following countries?
India sells more goods to the United States than it buys from it, and the USA has been the country with which India runs its largest trade surplus.
Read the full explanation →Equality before the law or equal protection of the laws within the territory of India is guaranteed under which one of the following Articles of the Constitution of India?
Article 14 says that the State shall not deny to any person equality before the law or the equal protection of the laws within the territory of India.
Read the full explanation →Consider the following statements with respect to the adolescent population (age group of 10 to 19 years) of India, according to the 2011 Census:
1. Adolescent population comprises half the population of the country.
2. The group is regarded as youthful population with high potential.
3. In this group there are greater number of females than males.
Which of the statements given above is/are correct?
Adolescents are seen as a youthful population with high potential, but in 2011 they were about one-fifth of India's people, and males outnumbered females among them.
Read the full explanation →Manikaran in Himachal Pradesh is known for:
Manikaran in the Parvati valley of Kullu district has natural hot springs, and India set up an experimental geothermal project there.
Read the full explanation →The Tolkappiyam is
The Tolkappiyam, written by Tolkappiyar, is the oldest surviving work of Tamil grammar. The Tolkappiyam belongs to the early Sangam tradition.
Read the full explanation →Which one among the following substances is a compound?
Cane sugar, or sucrose, is made of carbon, hydrogen and oxygen joined chemically in a fixed ratio, so it is a compound.
Read the full explanation →Which one of the following is an amphoteric oxide?
Aluminium oxide reacts with both acids and bases to form salt and water, which is what makes an oxide amphoteric.
Read the full explanation →Which of the following is one of the 'three gems' (triratna) of Jainism?
Samyag-darshana, or right faith, is the first of the three gems that Jainism lays down as the path to liberation.
Read the full explanation →With reference to the "Amara-Nayaka system", which one of the following statements is not correct?
The amara-nayakas were in fact expected to spend part of their revenue on temples and irrigation works. The amara-nayaka system was a key political innovation of the Vijayanagara Empire, and it drew on the iqta system of the Delhi Sultanate.
Read the full explanation →Consider the following statements related to water vapours:
1. It is a variable gas in the atmosphere, which decreases with altitude.
2. In the dry and cold areas of desert and polar regions, it may be less than one per cent of the air.
Which of the statements given above is/are correct?
Water vapour is a variable gas whose share of the air changes from place to place and falls with height, and it is scarce in cold and dry regions.
Read the full explanation →Consider the following pairs :
River — Flows into
1. Mekong — Andaman Sea
2. Thames — Irish Sea
3. Volga — Caspian Sea
4. Zambezi — Indian Ocean
Which of the pairs given above is/are correctly matched?
The Volga ends in the Caspian Sea and the Zambezi in the Indian Ocean, while the first two pairs are wrong.
Read the full explanation →Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces ?
Army — Airforce — Navy
1. Brigadier — Air Commodore — Commodore
2. Major General — Air Vice Marshal — Vice Admiral
3. Major — Squadron Leader — Lieutenant Commander
4. Lieutenant Colonel — Group Captain — Captain
Select the correct answer using the code given below:
Rows 1 and 3 give matching ranks, while rows 2 and 4 each pair ranks of different levels.
Read the full explanation →With reference to the Indus river system, of the following four rivers, three of them pour into one of them which joins the Indus direct. Among the following, which one is such river that joins the Indus direct?
The Jhelum, Ravi and Sutlej all end up in the Chenab, and the Chenab carries their combined water to the Indus.
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