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Defence GK Questions 2026

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.

Defence GK Questions with Answers

Q2562.General ScienceAsked in: NDA · NDA-I 2021, GATMedium

Which one of the following conclusions could not be derived from Rutherford's α-particle scattering experiment?

  1. A.Most of the space in the atom is empty.
  2. B.The radius of the atom is about 10⁵ times the radius of the nucleus.
  3. C.Electrons move in a circular path of fixed energy called orbits.
  4. D.Nearly all the mass of the atom resides in the nucleus.
Show answer
Correct answer: C. Electrons move in a circular path of fixed energy called orbits.

. Orbits of fixed energy were proposed by Niels Bohr in 1913; Rutherford's experiment said nothing about the energy of electrons.

Q2568.General ScienceAsked in: NDA · NDA-II 2026, GATMedium

Which of the following statements is/are correct in respect of Portland cement ? I. Adding more water (higher water-cement ratio) accelerates the initial setting time of cement. II. The addition of a small percentage of gypsum gives the desired retardation. III. Gypsum is added during manufacturing to accelerate the setting time of cement. Select the answer using the code given below :

  1. A.I and II
  2. B.I and III
  3. C.I only
  4. D.II only
Show answer
Correct answer: D. II only

Only statement II is correct: a small amount of gypsum is added to cement to slow down its setting. Portland cement is made by heating limestone and clay to form clinker, which is then ground with about 2 to 3 per cent gypsum (calcium sulphate dihydrate).

Q2569.General ScienceAsked in: NDA · NDA-I 2018, GATMedium

Which one of the following properties is NOT true for graphite ?

  1. A.Hybridisation of each carbon atom is sp³
  2. B.Hybridisation of each carbon atom is sp²
  3. C.Electrons are delocalized over the whole sheet of atoms
  4. D.Each layer is composed of hexagonal rings
Show answer
Correct answer: A. Hybridisation of each carbon atom is sp³

In graphite each carbon atom is sp² hybridised, not sp³, so statement A is the one that is not true.

Q2574.Indian HistoryAsked in: NDA · NDA-II 2021, GATHard

Which of the following statements about the Law Commission headed by Lord Macaulay is/are correct? 1. It attempted to codify the laws. 2. It was opposed to uniform system of Courts. Select the correct answer using the code given below :

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: A. 1 only

The Law Commission under Macaulay set out to codify Indian law, and it was not opposed to a uniform system of courts.

Q2575.General ScienceAsked in: NDA · NDA-I 2022, GATEasy

Which one of the following reactions is an example of decomposition reaction?

  1. A.CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)
  2. B.2AgCl(s) → (sunlight) 2Ag(s) + Cl₂(g)
  3. C.CuO + H₂ → (heat) Cu + H₂O
  4. D.Fe(s) + CuSO₄(aq) → FeSO₄(aq) + Cu(s)
Show answer
Correct answer: B. 2AgCl(s) → (sunlight) 2Ag(s) + Cl₂(g)

A single compound, silver chloride, breaks down into two simpler substances, silver and chlorine, which is exactly what a decomposition reaction is.

Q2576.Indian HistoryAsked in: NDA · NDA-II 2022, GATMedium

Which of the following statements about the Unionist Party is/are correct? 1. It was a political party representing the interests of landholders in Punjab. 2. It was opposed to the idea of the partition of India as India and Pakistan. Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 only
  3. C.Both 1 and 2
  4. D.Neither 1 nor 2
Show answer
Correct answer: C. Both 1 and 2

The Unionist Party spoke for the landholders of Punjab and was against the partition of India. Founded in 1923 by Sir Fazl-i-Husain and Sir Chhotu Ram, the Unionist Party brought together Muslim, Hindu and Sikh landowners and peasants of Punjab on a platform of rural interests rather than religion.

Q2577.GeographyAsked in: NDA · NDA-I 2023, GATMedium

Consider the following statements : 1. Distance between the longitudes becomes zero on North Pole and South Pole. 2. Distance between the longitudes is maximum on the Equator. 3. Number of longitudes is more than number of latitudes. Which of the statements given above is/are correct ?

  1. A.1 only
  2. B.2 only
  3. C.1 and 3 only
  4. D.1,2 and 3
Show answer
Correct answer: D. 1,2 and 3

All three statements are correct. Meridians of longitude are half-circles that run from the North Pole to the South Pole, so they are farthest apart on the Equator, about 111 km per degree, and come closer towards the poles until they meet there, where the gap becomes zero.

Q2578.General ScienceAsked in: NDA · NDA-II 2023, GATEasy

What is the action of litmus on ethanol ?

  1. A.Litmus is neutral towards ethanol
  2. B.Ethanol turns blue litmus to red; confirming acidic nature of ethanol
  3. C.Ethanol turns red litmus to blue; confirming basic nature of ethanol
  4. D.Ethanol decolorizes litmus through bleaching action
Show answer
Correct answer: A. Litmus is neutral towards ethanol

Ethanol does not change the colour of either red or blue litmus, because it is neutral. Ethanol, C₂H₅OH, is an alcohol.

Q2579.Indian HistoryAsked in: NDA · NDA-I 2024, GATHard

Which of the following statements are correct? 1. British 'trade surplus' with India in the nineteenth century meant that the value of British exports to India was much higher than the value of British imports from India. 2. India played a crucial role in the late-nineteenth-century world economy by helping Britain balance its deficits. 3. Britain grew opium in India and exported it to China and, therefore, for a while after the 1820s, opium became India's single largest export. 4. The nineteenth century saw export of Indian raw materials decline, and that of manufactured goods increase. Select the answer using the code given below :

  1. A.1 and 2 only
  2. B.3 and 4 only
  3. C.1, 2, 3 and 4
  4. D.1,2 and 3 only
Show answer
Correct answer: D. 1,2 and 3 only

Statements 1, 2 and 3 are correct; statement 4 reverses what actually happened. In the nineteenth century Britain sold far more to India, above all machine-made cotton cloth, than it bought from it, so it had a trade surplus with India.

GK Questions for sub-exams