Skip to content
GK24

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

Q3961.Indian EconomyAsked in: CDS · CDS-II 2019, GKEasy

Which of the following statements with regard to the 'Make in India' initiative is/are correct ? 1. It was launched in the year 2018. 2. Its objective is to foster innovation. 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: B. 2 only

Make in India was launched in 2014, not 2018, and fostering innovation is one of its stated objectives. Prime Minister Narendra Modi launched Make in India on 25 September 2014 to turn India into a global hub for design and manufacturing.

Q3962.General ScienceAsked in: CDS · CDS-I 2020, GKMedium

Silver articles become black after some time when exposed to air because

  1. A.silver gets oxidized to silver oxide
  2. B.silver reacts with moist carbon dioxide in the air to form silver carbonate
  3. C.silver reacts with sulphur in the air to form a coating of silver sulphide
  4. D.silver reacts with nitrogen oxides in the air to form silver nitrate
Show answer
Correct answer: C. silver reacts with sulphur in the air to form a coating of silver sulphide

The black layer on old silver is silver sulphide (Ag₂S). Air contains traces of sulphur compounds, mainly hydrogen sulphide (H₂S) from burning fuels and decaying matter.

Q3963.General ScienceAsked in: CDS · CDS-I 2021, GKEasy

Aluminium is manufactured from

  1. A.Copper ore
  2. B.Bauxite ore
  3. C.Mica ore
  4. D.Manganese ore
Show answer
Correct answer: B. Bauxite ore

Bauxite, a hydrated aluminium oxide (Al₂O₃·2H₂O), is the main ore from which aluminium is extracted. Bauxite is first purified into alumina (aluminium oxide) by the Bayer process.

Q3964.General ScienceAsked in: CDS · CDS-II 2021, GKHard

Which one of the following materials is present in a guard tube (drying tube) that is used for preparation of HCl gas ?

  1. A.Calcium chloride
  2. B.Calcium bromide
  3. C.Calcium iodide
  4. D.Calcium fluoride
Show answer
Correct answer: A. Calcium chloride

A guard tube is filled with anhydrous calcium chloride, which absorbs moisture and keeps the hydrogen chloride gas dry. In the school experiment, hydrogen chloride gas is made by heating sodium chloride with concentrated sulphuric acid, and the gas is passed through a guard tube containing calcium chloride.

Q3967.Indian EconomyAsked in: CDS · CDS-I 2023, GKHard

Which of the following is/are the sub-mission/sub-missions of the National Skill Development Mission (NSDM)? 1. Institutional training 2. Overseas employment 3. Leveraging of public infrastructure Select the correct answer using the code given below.

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

Institutional training, overseas employment and leveraging of public infrastructure are all sub-missions of the National Skill Development Mission.

Q3970.General ScienceAsked in: CDS · CDS-II 2024, GKMedium

The phenomenon of rainbow formation by water droplets involves :

  1. A.single refraction of sunlight
  2. B.one internal reflection of sunlight
  3. C.two internal reflections of sunlight
  4. D.both refraction and internal reflection of sunlight
Show answer
Correct answer: D. both refraction and internal reflection of sunlight

A rainbow forms only because sunlight is refracted, dispersed and internally reflected inside raindrops. When sunlight enters a water droplet it is refracted and split into its colours (dispersion), because each colour bends by a different amount.

Q3972.General ScienceAsked in: CDS · CDS-II 2025, GKMedium

Variable oxidation numbers are possible for :

  1. A.Sodium
  2. B.Calcium
  3. C.Iron
  4. D.Lithium
Show answer
Correct answer: C. Iron

Iron is a transition (d-block) element, and such elements can show more than one oxidation state. In transition metals the energies of the outer s electrons and the inner d electrons are very close, so atoms can lose different numbers of electrons.

Q3973.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

Which one among the following pairs is not correctly matched ?

  1. A.Nitrogen : Three unpaired electrons
  2. B.Carbon : Tetravalent
  3. C.Chlorine : Two stable isotopic forms
  4. D.Helium : Diatomic gas
Show answer
Correct answer: D. Helium : Diatomic gas

Helium is a noble gas whose atoms exist singly, so it is a monatomic gas, not a diatomic one. Helium has a completely filled first shell (1s²), so its atoms have no tendency to share electrons or bond with each other.

Q3974.Science & TechnologyEasy

Which of the following is NOT one of the four pillars of the quantum programme supported by TDB?

  1. A.Identity security
  2. B.Location integrity
  3. C.Time integrity
  4. D.Climate resilience
Show answer
Correct answer: D. Climate resilience

The four pillars are identity security, location integrity, network security and time integrity. Under identity security the project develops quantum-secure physical unclonable functions and quantum-safe trusted platform modules so that device identity is anchored in hardware.

Q3975.Science & TechnologyMedium

What is the amount of TDB support and the total cost of the QNu Labs quantum project?

  1. A.Support of Rs 100 crore in a project of Rs 250 crore
  2. B.Support of Rs 150 crore in a project of Rs 300 crore
  3. C.Support of Rs 200 crore in a project of Rs 400 crore
  4. D.Support of Rs 250 crore in a project of Rs 500 crore
Show answer
Correct answer: B. Support of Rs 150 crore in a project of Rs 300 crore

The Technology Development Board is contributing half the project's cost from the Research Development and Innovation Fund, and the support is routed through Optionally Convertible Debt.

Q3976.Science & TechnologyMedium

The Technology Development Board signed an agreement for quantum-secure technology support with which company?

  1. A.QNu Labs Private Limited, Bengaluru
  2. B.QpiAI India Private Limited, Pune
  3. C.BosonQ Psi Private Limited, Bhopal
  4. D.Quantum Ecosystems Technology Council of India
Show answer
Correct answer: A. QNu Labs Private Limited, Bengaluru

The Technology Development Board, which functions under the Department of Science and Technology, signed the agreement with this Karnataka-based company for financial support from the Research Development and Innovation Fund.

Q3977.DefenceMedium

Under which project is modern naval infrastructure being developed at Karwar?

  1. A.Project Varsha
  2. B.Project Seabird
  3. C.Project Sagarmala
  4. D.Project Dolphin
Show answer
Correct answer: B. Project Seabird

While speaking about the strategic value of Karwar, the Vice-President pointed to the ongoing development of modern naval infrastructure under Project Seabird, which is raising the Navy's capacity to base and maintain its ships and submarines and is also generating wider economic opportunities in the region.

Q3978.DefenceEasy

At which place was INS Samarthak commissioned into the Indian Navy?

  1. A.Visakhapatnam, Andhra Pradesh
  2. B.Kochi, Kerala
  3. C.Karwar, Karnataka
  4. D.Mumbai, Maharashtra
Show answer
Correct answer: C. Karwar, Karnataka

The commissioning ceremony was held at Karwar, and the Vice-President used the occasion to explain why the location matters: Karwar has a deep natural harbour and lies close to the Arabian Sea, which makes it an important element of India's maritime security architecture.

Q3980.Indian EconomyAsked in: UPSC CAPF · CAPF 2017, Paper IEasy

To which of the following sectors of the economy, the activity of agriculture and services belong to?

  1. A.Primary and Tertiary respectively
  2. B.Primary and Secondary respectively
  3. C.Tertiary and Secondary respectively
  4. D.Secondary and Quaternary respectively
Show answer
Correct answer: A. Primary and Tertiary respectively

Agriculture uses natural resources directly, and services are the tertiary sector. Economic activities are grouped into three main sectors.

GK Questions for sub-exams