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CDS GK Questions 2026

Static GK carries most of the 100 marks of the CDS General Knowledge paper. Of the 120 questions in the CDS (II) 2026 paper, about 20 were on Indian Polity, about 20 on the History of India, about 15 on Geography and the environment, about 10 on the Indian Economy and about 37 on Physics, Chemistry and Biology, which makes CDS the most science-heavy General Knowledge paper among the major recruitment exams. Polity questions test writs, the NHRC, electoral systems, disqualification of legislators, GST and delimitation. History runs from the Upanishads and the Shunga dynasty to Vijayanagara, temple architecture, the Sylhet referendum and the SNDP Yogam. Geography asks about the atmosphere, earthquakes and tsunamis, Ramsar sites, mangroves and World Heritage sites. Science stays at school level but expects reasoning: a lens problem, a magnetic field direction, molarity versus molality, what cooking soda is, how enzymes act. This page holds GK24's topic-wise GK notes for CDS, written as short facts and tables so that a topic can be revised in one sitting. Read a topic, then solve its previous-year questions and quiz on this site to check what stayed with you.

CDS GK Questions with Answers

Q3901.General ScienceAsked in: CDS · CDS-II 2021, GKMedium

In which of the following groups of organisms, is food material broken down outside the body and absorbed?

  1. A.Yeast, mushroom, bread mould
  2. B.Mushroom, Amoeba, green plants
  3. C.Cuscuta, tapeworm, lice
  4. D.Paramecium, Amoeba, Cuscuta
Show answer
Correct answer: A. Yeast, mushroom, bread mould

All three are fungi that feed saprophytically: they release enzymes onto dead organic matter, digest it outside their bodies and then absorb the dissolved food.

Q3902.General ScienceAsked in: CDS · CDS-I 2022, GKEasy

Suppose, due to an accident, the delicate lining of the mouth and the oesophagus of a person is injured. In this case, which one of the following tissues will be affected?

  1. A.Smooth muscle
  2. B.Cuboidal epithelium
  3. C.Squamous epithelium
  4. D.Striated muscle
Show answer
Correct answer: C. Squamous epithelium

The inner lining of the mouth and the oesophagus is made of squamous epithelium, so an injury to that lining damages this tissue.

Q3903.General ScienceAsked in: CDS · CDS-II 2022, GKEasy

Which one of the following statements about starch and glycogen is correct ?

  1. A.Both starch and glycogen are found in plant cells.
  2. B.Both starch and glycogen are found in animal cells.
  3. C.Starch is present in plant cells and glycogen is present in animal cells.
  4. D.Both starch and glycogen are present in plant cells as well as animal cells.
Show answer
Correct answer: C. Starch is present in plant cells and glycogen is present in animal cells.

Both are stored forms of glucose, but plants store it as starch and animals as glycogen. Starch and glycogen are polysaccharides, long chains of glucose units.

Q3904.General ScienceAsked in: CDS · CDS-I 2022, GKEasy

Which one of the following statements is not correct with regard to genetically modified organisms?

  1. A.In this technique a gene from one organism is isolated and transferred to the cell of another organism.
  2. B.This technique has applications only in plants.
  3. C.Genes for insect resistance may spread from crop plants to wild plants.
  4. D.To produce a transgenic animal the novel genes are inserted at a very early stage of development.
Show answer
Correct answer: B. This technique has applications only in plants.

Genetic modification is used in plants, animals and microbes alike, so this statement is false. A genetically modified organism is one whose DNA has been changed, usually by taking a useful gene from one organism and putting it into another.

Q3905.General ScienceAsked in: CDS · CDS-II 2022, GKMedium

Cl⁻ is not isoelectronic with

  1. A.K⁺
  2. B.Mg²⁺
  3. C.S²⁻
  4. D.P³⁻
Show answer
Correct answer: B. Mg²⁺

The chloride ion has 18 electrons, while the magnesium ion has only 10, so the two are not isoelectronic. Isoelectronic species have the same number of electrons.

Q3906.General ScienceAsked in: CDS · CDS-I 2023, GKMedium

Which of the following statements with regard to the reaction given below are correct? CaO(s) + H₂O(l) → Ca(OH)₂(aq) + Heat 1. Quicklime is used for white-washing of walls. 2. The solution of slaked lime is used for whitewashing of walls. 3. CaO reacts slowly with CO₂ in air to form a thin layer of CaCO₃ on walls. 4. Calcium hydroxide called 'slaked lime' is an inorganic compound. Select the correct answer using the code given below.

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

Walls are whitewashed with a solution of slaked lime, calcium hydroxide, which is an inorganic compound; quicklime itself is not applied, and the shiny layer comes from Ca(OH)₂, not CaO.

Q3907.Indian HistoryAsked in: CDS · CDS-II 2023, GKMedium

Which one of the following statements about the Shvetambara Sect of Jainism is not correct?

  1. A.It refers to monks, who wear white clothes.
  2. B.It refers to monks, who migrated to the south of Vindhyas in 4th century BCE.
  3. C.They recognized the existence canonical texts including the 12 Angas.
  4. D.They believed that women can also attain salvation.
Show answer
Correct answer: B. It refers to monks, who migrated to the south of Vindhyas in 4th century BCE.

The monks who went south were the followers of Bhadrabahu, who later became the Digambaras, not the Shvetambaras.

Q3908.General ScienceAsked in: CDS · CDS-I 2023, GKEasy

Consider the following statements regarding burning of magnesium ribbon in air : 1. White powder of MgO is formed. 2. It is an example of combustion reaction. 3. Heat and light are produced. Which of the statements given above are correct?

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

Magnesium ribbon burns in air with a dazzling white flame, giving off heat and light and leaving a white powder of magnesium oxide.

Q3910.Indian PolityAsked in: CDS · CDS-I 2024, GKHard

Political analysis involves both normative and empirical approaches. Which of the following statements is/are correct about the two approaches? 1. Knowledge acquired through the empirical approach is value-loaded. 2. Knowledge acquired through the normative approach is objectively neutral. 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: D. Neither 1 nor 2

Both statements reverse the two approaches: empirical knowledge aims to be value-free, while normative knowledge is value-loaded. The empirical approach studies politics as it is.

Q3911.General ScienceAsked in: CDS · CDS-I 2024, GKMedium

Which one of the following correctly describes the principle of the working of an atomic clock?

  1. A.Vibration of a small quartz crystal
  2. B.Simple harmonic motion of atoms inside a crystal
  3. C.Resonant frequency in cesium (or rubidium) atom
  4. D.Excitation and de-excitation of hydrogen atoms
Show answer
Correct answer: C. Resonant frequency in cesium (or rubidium) atom

An atomic clock keeps time by locking onto the fixed frequency of radiation that makes atoms such as cesium-133 or rubidium jump between two energy levels.

Q3913.General ScienceAsked in: CDS · CDS-II 2025, GKMedium

Van de Graaff generator generates :

  1. A.electrostatic charge
  2. B.magnetic field
  3. C.high voltage low alternating current
  4. D.high voltage low direct current
Show answer
Correct answer: A. electrostatic charge

A Van de Graaff generator is an electrostatic machine that builds up a very large static charge on a hollow metal sphere, raising it to millions of volts.

Q3914.GeographyAsked in: CDS · CDS-I 2025, GKMedium

Which of the following statements with reference to Jordan is/are correct ? 1. The country of Jordan was created through the British Mandate after World War I. 2. It is a landlocked country. Select the 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

Jordan grew out of the British Mandate after the First World War, but it is not landlocked because it touches the Gulf of Aqaba.

Q3915.General ScienceAsked in: CDS · CDS-II 2025, GKEasy

Twinkling of a star is due to :

  1. A.Interference of light
  2. B.Refraction of light
  3. C.Polarization of light
  4. D.Diffraction of light
Show answer
Correct answer: B. Refraction of light

Starlight is bent again and again by layers of air of changing density, so its path and brightness keep shifting and the star seems to twinkle.

Q3916.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

An object is placed at a distance of 15 cm in front of a concave mirror with a radius of curvature of 20 cm. Which one among the following statements is correct for the image formed?

  1. A.The image is 30 cm from the mirror on the same side as the object.
  2. B.The image is formed at a distance of 30 cm behind the mirror.
  3. C.The image is 60 cm from the mirror on the same side as the object.
  4. D.The image is formed at a distance of 60 cm behind the mirror.
Show answer
Correct answer: A. The image is 30 cm from the mirror on the same side as the object.

The focal length is 10 cm, and an object between F and C of a concave mirror gives a real image beyond C, in front of the mirror.

Q3917.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

An X-ray beam can be deflected by :

  1. A.An electric field
  2. B.A magnetic field
  3. C.An electric as well as a magnetic field
  4. D.Neither an electric field nor a magnetic field
Show answer
Correct answer: D. Neither an electric field nor a magnetic field

X-rays are electromagnetic waves made of photons, which carry no electric charge, so electric and magnetic fields cannot bend them.

Q3918.Indian PolityAsked in: CDS · CDS-II 2026, GKHard

Which one of the following statements related to below mentioned Committees of the Parliament is correct?

  1. A.The Rajya Sabha elects more members than the Lok Sabha to the Committee on the Welfare of Scheduled Castes and Scheduled Tribes
  2. B.The Chairperson of the Committee on Welfare of Other Backward Classes is appointed by the Speaker of the Lok Sabha
  3. C.Members nominated by the Chairman of the Rajya Sabha are more in number than Members nominated by the Speaker of the Lok Sabha on the Committee on Empowerment of Women
  4. D.The Rajya Sabha elects more members than the Lok Sabha to the Public Accounts Committee
Show answer
Correct answer: B. The Chairperson of the Committee on Welfare of Other Backward Classes is appointed by the Speaker of the Lok Sabha

The Committee on Welfare of Other Backward Classes is a joint committee whose Chairperson is appointed by the Speaker of the Lok Sabha from among its members.