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UPSC Civil Services GK Questions 2026

Static general knowledge is six of the seven lines of the General Studies Paper-I syllabus in the UPSC CSE notice: History of India and the Indian National Movement; Indian and World Geography; Indian Polity and Governance; Economic and Social Development; Environmental Ecology, Bio-diversity and Climate Change; and General Science. The Commission tests understanding rather than recall, through statements to be judged correct or incorrect, pairs to be matched and assertion-reason items, and it likes the edges of a topic: a lesser-known provision of the Constitution, a river's tributary, a species' conservation status, the mandate of a statutory body. This page holds GK24's topic-wise GK notes for UPSC, written as short facts and tables, in English and Hindi, with each note linked to the current affairs and previous-year questions on the same topic. Start with Polity and Modern History, which carry the most questions, then Geography, the Economy, Environment, Ancient and Medieval culture and Science. Read a note, solve its PYQs, take its quiz, and come back to it in your monthly revision. A candidate who knows these notes and reads the daily current affairs has covered the syllabus the notice prescribes for Paper-I.

UPSC Civil Services GK Questions with Answers

Q7521.BiharEasy

The climate of Bihar is best described as:

  1. A.Equatorial
  2. B.Hot desert
  3. C.Humid subtropical monsoon
  4. D.Mediterranean
Show answer
Correct answer: C. Humid subtropical monsoon

Bihar lies in the northern plain, where summers are hot, the rain comes in a single spell from the south-west monsoon between mid-June and early October, and winters are cool and dry with occasional cold waves.

Q7531.BiharMedium

The Gandak river joins the Ganga at which place?

  1. A.Doriganj, in Saran district
  2. B.Sonpur, opposite Patna
  3. C.Khagaria
  4. D.Kursela
Show answer
Correct answer: B. Sonpur, opposite Patna

The Gandak rises in Nepal, where it is called the Narayani or the Sapt Gandaki, enters Bihar at Valmikinagar in West Champaran and flows south-east to meet the Ganga at Sonpur, across the river from Patna.

Q7532.BiharEasy

The Ganga enters Bihar near which of the following places?

  1. A.Chausa, in Buxar district
  2. B.Maner, in Patna district
  3. C.Kursela, in Katihar district
  4. D.Rajmahal
Show answer
Correct answer: A. Chausa, in Buxar district

The Ganga comes into Bihar from Uttar Pradesh near Chausa, flows from west to east for about 445 kilometres and leaves the state for West Bengal near Rajmahal, splitting Bihar into the North Bihar plain and the South Bihar plain on the way.

Q7533.BiharEasy

Which river is known as the 'Sorrow of Bihar'?

  1. A.Gandak
  2. B.Kosi
  3. C.Son
  4. D.Punpun
Show answer
Correct answer: B. Kosi

The Kosi earns the name because it brings an exceptionally heavy load of silt down from Nepal, drops it the moment it reaches the flat North Bihar plain, raises its own bed above the surrounding land and then breaks out into a new channel.

Q7534.Science & TechnologyHard

The main detector planned for the India-based Neutrino Observatory in Theni district is

  1. A.a water Cherenkov tank
  2. B.a 50,000-tonne magnetised Iron CALorimeter
  3. C.a liquid argon time projection chamber
  4. D.a superconducting tokamak
Show answer
Correct answer: B. a 50,000-tonne magnetised Iron CALorimeter

Placed in a cavern under about 1,300 metres of rock at Pottipuram in the Bodi West Hills, it is designed to catch atmospheric neutrinos and measure how they change from one flavour to another, the phenomenon of neutrino oscillation; the magnetic field lets it tell a neutrino from an antineutrino.

Q7535.Science & TechnologyMedium

LIGO-India, the third detector of the LIGO network, is being set up at which place?

  1. A.Aundha, Hingoli district, Maharashtra
  2. B.Hanle, Ladakh
  3. C.Pottipuram, Theni district, Tamil Nadu
  4. D.Khodad, Pune district, Maharashtra
Show answer
Correct answer: A. Aundha, Hingoli district, Maharashtra

The site was chosen for its flat, seismically quiet ground, the Union Cabinet approved the project in principle in 2016 and in full in April 2023, and it is being executed by the Department of Atomic Energy and the Department of Science and Technology with IPR, RRCAT Indore and IUCAA…

Q7536.Science & TechnologyEasy

Gravitational waves, first detected by LIGO in September 2015, had been predicted a century earlier by whom?

  1. A.Isaac Newton
  2. B.Albert Einstein
  3. C.Niels Bohr
  4. D.Stephen Hawking
Show answer
Correct answer: B. Albert Einstein

Gravitational waves are ripples in space-time thrown out by violent events such as the merger of two black holes, and they follow from the general theory of relativity that Einstein published in 1915, with the prediction of the waves set out in 1916.

Q7537.Science & TechnologyAsked in: Rajasthan · 28 June 2022Medium

During a nuclear fusion reaction -

  1. A.A light nucleus breaks up due to bombardment of thermal neutrons.
  2. B.A heavy nucleus breaks up due to bombardment of thermal neutrons.
  3. C.Two light nuclei combine to give a heavier nucleus and possibly other products.
  4. D.A heavy nucleus breaks into two fragments by itself.
Show answer
Correct answer: C. Two light nuclei combine to give a heavier nucleus and possibly other products.

Fusion is the joining of two light nuclei into a heavier one, with a neutron or other products released and a large amount of energy appearing because the mass of the product is slightly less than the mass of the reactants; in ITER the reaction fuses deuterium and tritium into…

Q7538.Science & TechnologyAsked in: SSC MTS · 21 August 2019, Shift 3Easy

Hydrogen bomb is based on which Nuclear process?

  1. A.Thermal fusion
  2. B.Heavy Water Ability
  3. C.Thermal fission
  4. D.Rapid breeder reaction
Show answer
Correct answer: A. Thermal fusion

A hydrogen bomb, also called a thermonuclear bomb, uses a fission explosion only as a trigger; the main energy comes from the fusion of the heavy hydrogen isotopes deuterium and tritium into helium at temperatures of millions of degrees, which is why the process is described as thermonuclear or thermal…

Q7539.Science & TechnologyMedium

India contribution to ITER is delivered by ITER-India, a unit of which institution?

  1. A.Institute for Plasma Research, Gandhinagar
  2. B.Bhabha Atomic Research Centre, Mumbai
  3. C.Indian Institute of Astrophysics, Bengaluru
  4. D.Physical Research Laboratory, Ahmedabad
Show answer
Correct answer: A. Institute for Plasma Research, Gandhinagar

This institute of the Department of Atomic Energy is the national centre for plasma and fusion research, it houses the domestic agency ITER-India that supplies India share of the machine, and it operates India own tokamaks Aditya and SST-1, the Steady State Superconducting Tokamak.