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RRB NTPC GK Questions 2026

Static General Knowledge makes up the rest of the General Awareness section in RRB NTPC, and the notices name its topics: General Science and Life Science up to Class 10, History of India and the freedom struggle, Physical, Social and Economic Geography of India and the world, Indian Polity and Governance, Indian Economy, Art and Culture, Indian Literature, Monuments and Places, Flora and Fauna, Famous Personalities, the UN and other world organisations, environmental issues, Transport Systems in India, Important Government and Public Sector Organisations, Common Abbreviations, and Basics of Computers and Computer Applications. RRB frames these as short factual questions: the unit of a physical quantity, the year of a battle, the article of the Constitution, the river a city stands on, the full form of an abbreviation, the headquarters of an organisation. GK24's GK notes on this page cover each topic in English and Hindi, arranged the way the syllabus lists them, with the facts RRB tends to ask placed first. Work through one topic at a time, note the lists (national parks, dances, articles, schedules, awards), and pair each topic with its quiz on GK24 to check what has stayed with you.

RRB NTPC GK Questions with Answers

Q7421.General ScienceAsked in: NDA · NDA-I 2026, GATHard

A pendulum of length L oscillates with an angular amplitude of θ = 60° and time period T. Let T₀ = 2π√(L/g) be the time period for small angle of oscillations, where g is the acceleration due to gravity. If air resistance is negligibly small and the string remains straight, then which one of the following is correct?

  1. A.T will be slightly greater than T₀.
  2. B.T will be slightly smaller than T₀.
  3. C.T will be exactly equal to T₀.
  4. D.T will depend upon the mass of the bob.
Show answer
Correct answer: A. T will be slightly greater than T₀.

The formula T₀ = 2π√(L/g) holds only for small swings; at large amplitudes the period grows.

Q7422.General ScienceAsked in: NDA · NDA-II 2026, GATMedium

A bicycle racing track is a level circular road of radius 10 m. Three cyclists P, Q and R with identical cycles are cycling on the track with speeds 2 m/s, 3 m/s and 5 m/s respectively. If the coefficient of friction between the tyres and the road is 0.1, then which cyclist will slip? (Take g = 10 m/s²)

  1. A.P only
  2. B.Q only
  3. C.R only
  4. D.All will slip
Show answer
Correct answer: C. R only

On a level curve, friction alone supplies the centripetal force, so a cyclist slips when the needed force exceeds the maximum friction.

Q7423.General ScienceAsked in: CDS · CDS-I 2020, GKMedium

Which one of the following chemical reactions is not feasible?

  1. A.Fe + CuSO4 → FeSO4 + Cu
  2. B.Zn + CuSO4 → ZnSO4 + Cu
  3. C.Cu + PbCl2 → CuCl2 + Pb
  4. D.Mg + CuSO4 → MgSO4 + Cu
Show answer
Correct answer: C. Cu + PbCl2 → CuCl2 + Pb

Copper is less reactive than lead, so it cannot push lead out of its compound. In a displacement reaction, a more reactive metal takes the place of a less reactive metal in its salt solution.

Q7426.General ScienceAsked in: CDS · CDS-I 2023, GKMedium

A leaf was plucked from a plant on a sunny day and kept for 2 minutes in boiling water. It was subsequently immersed in boiling alcohol and treated with iodine solution. What will be the final colour of the leaf after the test?

  1. A.Colourless
  2. B.Green
  3. C.Blue
  4. D.White
Show answer
Correct answer: C. Blue

A leaf from a sunny day is full of starch made by photosynthesis, and iodine turns starch blue-black. This is the standard school test for starch in a leaf.

Q7431.General ScienceAsked in: CDS · CDS-I 2017, GKEasy

Polynucleotide chain of DNA contains

  1. A.a nitrogenous base, deoxyribose sugar and phosphate group
  2. B.a nitrogenous base, ribose sugar and phosphate group
  3. C.deoxyribose sugar, ribose sugar and phosphate group
  4. D.a nitrogenous base and phosphate group only
Show answer
Correct answer: A. a nitrogenous base, deoxyribose sugar and phosphate group

Each nucleotide of DNA is made of these three parts, and many nucleotides joined together form the polynucleotide chain. In a DNA strand, the sugar of one nucleotide is linked to the phosphate of the next by a phosphodiester bond, making a sugar-phosphate backbone.

Q7433.General ScienceAsked in: CDS · CDS-II 2018, GKEasy

Two reactants in a flask at room temperature are producing bubbles of a gas that turn limewater milky. The reactants could be

  1. A.zinc and hydrochloric acid
  2. B.magnesium carbonate and hydrochloric acid
  3. C.methane and oxygen
  4. D.copper and dilute hydrochloric acid
Show answer
Correct answer: B. magnesium carbonate and hydrochloric acid

A carbonate reacts with an acid at room temperature to give carbon dioxide, and only carbon dioxide turns limewater milky.

Q7434.General ScienceAsked in: CDS · CDS-II 2021, GKEasy

What is the effect of pressure of a human body on sand ?

  1. A.Larger while standing than while lying
  2. B.Smaller while standing than while lying
  3. C.Same while standing or lying
  4. D.Larger while standing during the daytime and smaller during the night time while lying
Show answer
Correct answer: A. Larger while standing than while lying

The body's weight stays the same, but standing puts it on the small area of the feet, so the pressure is greater.

Q7437.General ScienceAsked in: CDS · CDS-II 2023, GKEasy

If the Moon is brought closer to the Earth such that its distance from the Earth becomes half of the original distance, then the gravitational force of attraction between the Earth and the Moon would :

  1. A.reduce to half of its original value.
  2. B.increase to two times of its original value.
  3. C.remain the same as the original value.
  4. D.increase to four times of its original value.
Show answer
Correct answer: D. increase to four times of its original value.

Gravitational force varies inversely as the square of the distance, so halving the distance makes the force 2 × 2 = 4 times larger.

Q7440.General ScienceAsked in: UPSC CAPF · CAPF 2018, Paper IEasy

Lowering the atmospheric pressure on a liquid

  1. A.increases the boiling point of the liquid
  2. B.lowers the boiling point of the liquid
  3. C.does not affect the boiling point of the liquid
  4. D.increases the time required for it to boil
Show answer
Correct answer: B. lowers the boiling point of the liquid

A liquid boils when its vapour pressure equals the pressure above it, so less outside pressure means boiling starts at a lower temperature.