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Railway GK Questions 2026

Static GK in railway exams starts with one shared block: Class 10 science. Every RRB exam on GK24 tests it. Group D has 25 questions on Physics, Chemistry and Life Sciences of 10th CBSE level. JE has 30 in CBT-1 and another 15 on Physics and Chemistry in CBT-2. ALP tests General Science in CBT-1 and Basic Science and Engineering in CBT-2, and NTPC lists general science up to 10th inside General Awareness. Beyond science, the lists differ. NTPC names history and the freedom struggle, geography, polity, the economy, art and culture, environment, computers, abbreviations, transport systems in India, world organisations and government bodies. JE names geography, history and culture, polity, the economy and environmental issues, and adds computers and pollution control in CBT-2. This page holds GK24's topic-wise GK notes for railway exams in English and Hindi: General Science, History, Geography, Polity, Economy, Art and Culture, Environment, Computers and static GK, including Indian Railways. Each note is short facts and tables that can be revised in one sitting. Begin with the science notes, since they serve every railway exam, then add the static topics your exam lists, and test each note with its quiz.

Railway GK Questions with Answers

Q2382.General ScienceAsked in: NDA · NDA-II 2017, GATEasy

The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is known as

  1. A.Avogadro's hypothesis
  2. B.Gay-Lussac's hypothesis
  3. C.Planck's hypothesis
  4. D.Kirchhoff's theory
Show answer
Correct answer: A. Avogadro's hypothesis

The Italian scientist Amedeo Avogadro proposed in 1811 that equal volumes of all gases, at the same temperature and pressure, hold the same number of molecules.

Q2383.General ScienceAsked in: NDA · NDA-II 2018, GATEasy

Which one of the following statements is correct for a plane mirror?

  1. A.Its focal length is zero.
  2. B.The size of the image of an object placed in front of the mirror is slightly less than that of the object.
  3. C.The image is virtual, erect and laterally inverted.
  4. D.Its focal length is 200 cm.
Show answer
Correct answer: C. The image is virtual, erect and laterally inverted.

A plane mirror always forms an image that stands upright, cannot be caught on a screen, and has its left and right sides swapped.

Q2384.General ScienceAsked in: NDA · NDA-I 2019, GATEasy

'Black hole' is a

  1. A.huge black star which has zero acceleration due to gravity on its surface
  2. B.star which has moderate acceleration due to gravity on its surface
  3. C.star which has collapsed into itself and has large acceleration due to gravity on its surface
  4. D.star which has collapsed into itself and has zero acceleration due to gravity on its surface
Show answer
Correct answer: C. star which has collapsed into itself and has large acceleration due to gravity on its surface

A black hole forms when a very massive star collapses under its own gravity, and its pull becomes so strong that not even light can escape.

Q2385.Indian PolityAsked in: NDA · NDA-II 2019, GATEasy

Article 46 of the Constitution of India refers to the promotion of educational and economic interests of

  1. A.religious minorities.
  2. B.Scheduled Castes, Scheduled Tribes and other weaker sections.
  3. C.displaced persons from large irrigation projects.
  4. D.the economically deprived
Show answer
Correct answer: B. Scheduled Castes, Scheduled Tribes and other weaker sections.

Article 46 asks the State to promote with special care the educational and economic interests of the weaker sections, in particular the Scheduled Castes and Scheduled Tribes.

Q2386.General ScienceAsked in: NDA · NDA-II 2021, GATEasy

A uniform motion of a car along a circular path experiences

  1. A.a change in speed due to a change in its direction of motion.
  2. B.a change in velocity due to a change in its direction of motion.
  3. C.a change in momentum due to no change in its direction of motion.
  4. D.a constant momentum due to a change in its direction of motion.
Show answer
Correct answer: B. a change in velocity due to a change in its direction of motion.

In uniform circular motion the speed stays the same, but the direction changes at every point, so the velocity keeps changing.

Q2388.General ScienceAsked in: NDA · NDA-I 2025, GATEasy

Vitamin B1 is also known as

  1. A.Riboflavin
  2. B.Thiamin
  3. C.Retinol
  4. D.Tocopherol
Show answer
Correct answer: B. Thiamin

Vitamin B1 is the chemical called thiamin (also spelt thiamine), the first of the B-complex vitamins to be identified. Thiamin is a water-soluble vitamin that helps the body turn carbohydrates into energy and keeps nerves and the heart working properly.

Q2391.GeographyAsked in: CDS · CDS-II 2023, GKMedium

Consider the following statements about some planets in the solar system : 1. Mercury has no atmosphere. 2. Venus has two moons. 3. There is no land on Jupiter. 4. Rings of Saturn are composed of lumps of ice and dust. Which of the statements given above are correct ?

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

Mercury is small and very close to the Sun, so its weak gravity and the intense solar heat and wind have stripped away almost all gas; it has only a trace exosphere, which is why it is described as having no atmosphere.

Q2392.GeographyAsked in: CDS · CDS-I 2017, GKMedium

Which one of the following statements with regard to the winter solstice is correct?

  1. A.The South Pole experiences 24 hours of darkness.
  2. B.It occurs on June 21.
  3. C.The North Pole experiences 24 hours of darkness.
  4. D.The Sun is at aphelion.
Show answer
Correct answer: C. The North Pole experiences 24 hours of darkness.

The winter solstice of the Northern Hemisphere falls on about 22 December. On that day the Sun's rays fall vertically on the Tropic of Capricorn, and the North Pole is tilted away from the Sun.

Q2400.General ScienceAsked in: CDS · CDS-II 2026, GKEasy

Chemical formula of cooking soda is

  1. A.NaCl
  2. B.NaOCl
  3. C.Na2CO3
  4. D.NaHCO3
Show answer
Correct answer: D. NaHCO3

Cooking soda, also called baking soda, is sodium hydrogen carbonate, also known as sodium bicarbonate. It is a mild base made from one sodium, one hydrogen, one carbon and three oxygen atoms.

GK Questions for sub-exams