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.
The resistivity ρ of a material may be expressed in units of
Resistivity equals resistance multiplied by area and divided by length, which leaves the unit ohm × length.
Read the full explanation →Which one among the following statements pertaining to the President's term of office is not correct?
Under Article 56, the President resigns by writing to the Vice-President of India, not to the Speaker of the Lok Sabha, so this statement is not correct.
Read the full explanation →Rupa and Sachin observed an animal in their school garden. Rupa called it an insect while Sachin identified it as an earthworm. Which one of the following characteristics confirms that it is an insect ?
Jointed legs are the mark of the phylum Arthropoda, to which insects belong; an earthworm has no legs at all.
Read the full explanation →Which one of the following is the main reason of acid rains ?
These gases react with water in the air to form sulphuric and nitric acids, which fall as acid rain. Sulphur dioxide comes mainly from burning coal and oil in power plants and smelters, and nitrogen oxides from vehicle engines and high-temperature furnaces.
Read the full explanation →A metal wire of length l and diameter d has a resistance R. What would be the resistance of another wire of the same metal and of same length but having double the diameter ?
Resistance varies inversely with the area of cross-section, and doubling the diameter makes the area four times larger. The resistance of a wire is R = ρl/A, where ρ is the resistivity of the metal, l the length and A the cross-sectional area.
Read the full explanation →Which one among the following is the highest mountain in Africa ?
At about 5,895 m, it is the highest peak in Africa and the tallest free-standing mountain in the world. Kilimanjaro is a dormant volcano in north-eastern Tanzania, close to the Kenyan border.
Read the full explanation →The use of plastics has led to a number of environment-related problems. For this, which one of the following statements is correct?
Bacteria and fungi cannot break down most plastics, so plastic waste stays in soil and water for hundreds of years.
Read the full explanation →A motorcycle has initial velocity of 5 m/s. After 3 seconds, the velocity is 7 m/s. The displacement of the motorcycle in 3 seconds is :
With the velocity changing steadily from 5 m/s to 7 m/s, the average velocity is 6 m/s, and 6 m/s × 3 s = 18 m. For uniform acceleration, displacement s = ((u + v)/2) × t. Here u = 5 m/s, v = 7 m/s and t = 3…
Read the full explanation →Which one among the following is the correct scheme followed for classification of animals ?
This is the taxonomic hierarchy for animals, going from the broadest group down to the most specific. Linnaeus built this ladder of ranks, and each rank contains one or more ranks below it.
Read the full explanation →Which one of the following statements best reflects the idea behind the "Fractional Orbital Bombardment System" often talked about in media ?
In a Fractional Orbital Bombardment System, a warhead is placed in a low orbit around the Earth and then brought down out of that orbit onto its target.
Read the full explanation →Which one of the following is an organelle that is NOT found in prokaryotic cells?
Prokaryotic cells such as bacteria have no membrane-bound organelles, so they lack mitochondria. Prokaryotes have no true nucleus: their DNA lies in a region called the nucleoid, and they have no mitochondria, chloroplasts, endoplasmic reticulum or Golgi body.
Read the full explanation →Consider the following Wildlife Sanctuaries of India: 1. Shikari Devi 2. Bhadra 3. Simlipal 4. Pachmarhi Which one of the following is the correct order of the above Wildlife Sanctuaries in terms of their location from south to north?
From south to north the order is Bhadra (Karnataka), Simlipal (Odisha), Pachmarhi (Madhya Pradesh) and Shikari Devi (Himachal Pradesh). Bhadra lies in the Western Ghats of Chikkamagaluru district, Karnataka, at about 13.5°N, and is a tiger reserve.
Read the full explanation →"Inversion of Rainfall" is associated with
On a mountain slope, rainfall increases with height only up to a certain level and then decreases above it; this is called the inversion of rainfall.
Read the full explanation →Chalk and marble are different forms of
Chalk, limestone and marble are all forms of calcium carbonate, CaCO₃. Chalk is a soft, porous rock built from the tiny shells of marine plankton.
Read the full explanation →In mitochondria, ATP synthesizing chemical reactions take place in the
The enzyme that makes most of the cell's ATP, ATP synthase, sits in the inner mitochondrial membrane along with the electron transport chain.
Read the full explanation →The Tropic of Cancer does not pass through which one of the following States?
The Tropic of Cancer (23.5°N) passes through eight Indian states, and Manipur is not one of them; it lies just to the north.
Read the full explanation →Which one of the following plant plastids stores starch, oil and protein granules?
Leucoplasts are colourless plastids that store food: starch, oils and proteins. Plastids are found only in plant cells and some algae, and they are of three main kinds.
Read the full explanation →Silver artefacts get tarnished in air due to the formation of
Silver turns black in air because it reacts with sulphur compounds, mainly hydrogen sulphide, to form a thin black coating of silver sulphide (Ag₂S).
Read the full explanation →Which of the hydrocarbons are arranged as per the increasing order of their boiling points?
In the alkane series the boiling point rises as the carbon chain gets longer, and this order goes from 3 to 4 to 5 to 8 carbons.
Read the full explanation →In which one of the following ways did the First World War Not impact Europe?
The war did not reduce support for conservative dictatorships; popular support for them actually grew after 1918. The First World War (1914–18) left Europe drained.
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