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RRB Group D GK Questions 2026

Static GK is not a separate section in RRB Group D, but it decides most of the paper's recall marks. General Science is 25 questions of Physics, Chemistry and Life Sciences at 10th standard (CBSE) level as per CEN 09/2025, and the 20 General Awareness questions lean on the standing facts behind the news: the sport, the award, the institution, the state, the river or the scientist an event touches. This page holds GK24's topic-wise GK notes for RRB Group D. The General Science notes go topic by topic through motion and force, work, energy and power, gravitation, heat, light, sound, electricity and magnetism, atomic structure and the periodic table, chemical reactions, acids, bases and salts, metals and non-metals, and carbon compounds, and the Life Sciences notes cover cells, the human body, nutrition, diseases, plants and genetics. The static GK notes cover Indian Railways zones and facts, national symbols, first and largest in India and the world, awards and honours, important days, books and authors, sports GK, art and culture, and the basics of Indian Polity, Geography, History and the Economy. Each note is short facts and tables that can be revised in one sitting. Read a note, then solve its quiz and the previous-year questions on this site to check what stayed.

RRB Group D GK Questions with Answers

Q781.General ScienceAsked in: NDA · NDA-I 2018, GATMedium

Which one of the following is the number of water molecules that share with two formula unit CaSO₄ in plaster of Paris ?

  1. A.One
  2. B.Two
  3. C.Five
  4. D.Ten
Show answer
Correct answer: A. One

Plaster of Paris is calcium sulphate hemihydrate, CaSO₄·½H₂O, so one molecule of water is shared by two formula units of calcium sulphate, written (CaSO₄)₂·H₂O. It is made by heating gypsum, CaSO₄·2H₂O, to about 373 K (100 °C), when gypsum loses one and a half molecules of water per formula unit.

Q782.General ScienceAsked in: NDA · NDA-II 2018, GATMedium

Consider the following statements about visible light, UV light and X-rays: 1. The wavelength of visible light is more than that of X-rays. 2. The energy of X-ray photons is higher than that of UV light photons. 3. The energy of UV light photons is less than that of visible light photons. Which of the statements given above is/are correct?

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

In the order visible light → ultraviolet → X-rays, the wavelength falls and the photon energy rises, so statements 1 and 2 are true and 3 is false.

Q784.General ScienceAsked in: NDA · NDA-II 2019, GATEasy

Light rays move in straight lines. But through an optical fibre, they can move in any type of zigzag path because

  1. A.the holes through the fibre are extremely fine.
  2. B.light rays are absorbed at the entry end and relieved at the exit end of the fibre.
  3. C.scattering of light occurs inside the fibre.
  4. D.successive total internal reflections occur as a ray moves through the fibre.
Show answer
Correct answer: D. successive total internal reflections occur as a ray moves through the fibre.

Light inside an optical fibre strikes the wall at more than the critical angle, is totally reflected back inside, and repeats this again and again along the fibre.

Q786.General ScienceAsked in: NDA · NDA-I 2022, GATEasy

Which one of the following statements about fertilizers is not correct?

  1. A.Urea is a phosphorus-containing fertilizer.
  2. B.Application of fertilizer to the soil increases fertility of the soil.
  3. C.Urea can be prepared by action of ammonia and carbon dioxide under high pressure and at high temperature.
  4. D.Urea contains more nitrogen than other fertilizers.
Show answer
Correct answer: A. Urea is a phosphorus-containing fertilizer.

Urea, CO(NH₂)₂, contains carbon, oxygen, nitrogen and hydrogen; it has no phosphorus at all and is a nitrogenous fertilizer. Urea carries about 46% nitrogen, the highest of the common solid fertilizers, which is why it is the most widely used fertilizer in India.

Q787.General ScienceAsked in: NDA · NDA-I 2023, GATMedium

Which one of the following statements about X-rays is not true ?

  1. A.They have wavelengths of about 1 Å.
  2. B.These can be generated by bombarding a metal target by high energy electrons.
  3. C.Due to their wavelengths being shorter, these can be used for radar systems.
  4. D.These are also used for the treatment of certain forms of cancer.
Show answer
Correct answer: C. Due to their wavelengths being shorter, these can be used for radar systems.

X-rays are not used in radar; radar works with microwaves, which have wavelengths of a few centimetres. X-rays lie between ultraviolet rays and gamma rays in the electromagnetic spectrum, with wavelengths from about 10 nm down to 0.01 nm, so about 1 Å (0.1 nm) is typical.

Q789.General ScienceAsked in: NDA · NDA-I 2026, GATHard

Consider the following pairs of reactions and properties : Reaction — Property I. Fe(s) + 2HCl(aq) → FeCl₂(aq) + H₂(g) — Fe is reductant II. Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s) — Cu is being reduced III. Br₂(l) + 2I⁻(aq) → 2Br⁻(aq) + I₂(s) — Br₂ is reductant IV. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) — C atom in CH₄ is oxidized Which of the above pairs are correct?

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

Pairs I, II and IV describe the electron transfer correctly; pair III calls bromine a reductant when it is the oxidant.

Q790.General ScienceAsked in: NDA · NDA-II 2026, GATMedium

Coconut oil upon hydrolysis with potassium hydroxide gives :

  1. A.Free fatty acids and sodium hydroxide
  2. B.Glycerol and sodium salts of fatty acids
  3. C.Glycol and potassium salts of fatty acids
  4. D.Glycerol and potassium salts of fatty acids
Show answer
Correct answer: D. Glycerol and potassium salts of fatty acids

Boiling an oil or fat with an alkali splits it into glycerol and the salts of its fatty acids; with potassium hydroxide those salts are potassium salts.

Q791.SportsEasy

Which pair correctly matches the player with the event in which the bronze medal was won on 20 October 2026?

  1. A.Jehan Dorab Madan – Women’s Singles Class 3
  2. B.Sonalben Patel – Men’s Singles Class 1
  3. C.Sonalben Patel – Women’s Singles Class 3
  4. D.Jehan Dorab Madan – Mixed Doubles Class 3
Show answer
Correct answer: C. Sonalben Patel – Women’s Singles Class 3

She took the bronze there at the Asian Para Games 2026 on 20 October 2026, and that medal was the first individual one she had added to her record at these Games.

Q792.SportsMedium

Sonalben Patel’s bronze at the Asian Para Games 2026 was significant for which reason?

  1. A.It was her first individual medal at these Games
  2. B.It was the first medal of her entire career
  3. C.It was India’s first medal in table tennis
  4. D.It came in a mixed doubles event
Show answer
Correct answer: A. It was her first individual medal at these Games

Sonalben Patel won bronze in the Women’s Singles Class 3 event on 20 October 2026, and the medal was described as the first individual one she had added to her achievements at the Asian Para Games, which implies that her earlier record there rested on other kinds of competition.

Q793.SportsMedium

Jehan Dorab Madan won a bronze medal at the Asian Para Games 2026 in which event?

  1. A.Men’s Singles Class 1
  2. B.Men’s Singles Class 3
  3. C.Men’s Doubles Class 1
  4. D.Women’s Singles Class 1
Show answer
Correct answer: A. Men’s Singles Class 1

Jehan Dorab Madan won bronze there on 20 October 2026 at the Asian Para Games 2026, and the Prime Minister, congratulating him, said India’s para table tennis contingent was continuing to make the nation proud and that the result reflected the player’s passion and his skills.

Q794.SportsEasy

What was common to the para table tennis bronze medals won by Prachi Pandey and Baby Sahana Ravi on 20 October 2026?

  1. A.Both were won in the same event
  2. B.Both were won on the athletes’ debut appearance at the Games
  3. C.Both athletes had won gold at the previous edition
  4. D.Both medals were won in doubles competition
Show answer
Correct answer: B. Both were won on the athletes’ debut appearance at the Games

Prachi Pandey’s bronze in the Women’s Singles Class 6 event and Baby Sahana Ravi’s bronze in the Women’s Singles Class 9 event both came the first time each of them competed at the Asian Para Games, and each medal was also a first of its kind for India, one in…

Q796.SportsMedium

Prachi Pandey became the first Indian to win a medal in which event at the Asian Para Games?

  1. A.Women’s Singles Class 6
  2. B.Women’s Singles Class 9
  3. C.Women’s Singles Class 3
  4. D.Women’s Doubles Class 6
Show answer
Correct answer: A. Women’s Singles Class 6

Prachi Pandey took bronze there on 20 October 2026 and became the first Indian ever to win a medal in that class at the Asian Para Games, which is why the Prime Minister described it as a historic first for Indian para table tennis and a pathbreaking achievement.

Q797.SportsEasy

What colour were both the medals India won on 20 October 2026 at the Asian Para Games 2026?

  1. A.One gold and one silver
  2. B.Both silver
  3. C.Both bronze
  4. D.One bronze and one gold
Show answer
Correct answer: C. Both bronze

The two Indian medals reported from the Asian Para Games 2026 on 20 October 2026 were bronze: Ravanni Valasanaini in the Women’s 1500m T11 event, where the result also stood as her personal best, and Bhavina Patel in the Women’s Singles Class 4-5 event, where the medal was called another…

Q798.SportsMedium

Which Indian athlete won bronze in the Women’s 1500m T11 event at the Asian Para Games 2026 with a personal best?

  1. A.Bhavina Patel
  2. B.Ravanni Valasanaini
  3. C.Deepa Malik
  4. D.Simran Sharma
Show answer
Correct answer: B. Ravanni Valasanaini

She brought home the bronze in the Women’s 1500m T11 event at the Asian Para Games 2026 on 20 October 2026, and the timing was also her personal best, which is why her result was read as a double gain: a podium place and her own fastest run.

Q800.Government SchemesMedium

Which ministry organises Shilp Samagam Mela through its three national corporations?

  1. A.Ministry of Textiles
  2. B.Ministry of Culture
  3. C.Ministry of Social Justice and Empowerment
  4. D.Ministry of Micro, Small and Medium Enterprises
Show answer
Correct answer: C. Ministry of Social Justice and Empowerment

The mela is that ministry's marketing-support platform for artisans and beneficiaries linked to its three national corporations, namely the National Scheduled Castes Finance and Development Corporation, the National Safai Karamcharis Finance and Development Corporation and the National Backward Classes Finance and Development Corporation, known by the short forms NSFDC, NSKFDC…