Static GK decides the General Awareness score in SSC CGL. Of the 25 questions in Tier-I and the 25 in Tier-II Paper-I, most come from Indian Polity, History, Geography, the Economy and General Science, the areas the CGL 2026 notice lists as History, Culture, Geography, Economic Scene, General Policy and Scientific Research relating to India and its neighbouring countries. Polity questions ask about articles, parts and schedules of the Constitution, amendments, the President, Parliament, the Supreme Court and constitutional bodies. History covers the Indus Valley, the Mauryas and Guptas, the Delhi Sultanate and Mughals, and the freedom struggle from 1857 to 1947. Geography asks about rivers, soils, climate, national parks, minerals and world physical features. The Economy part asks about budget terms, the RBI, banking and basic concepts. General Science is school-level Physics, Chemistry and Biology. This page holds GK24's topic-wise GK notes for SSC CGL, written as short facts and tables so 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 you retained.
India's only active volcano is located on which island?
Barren Island lies in the Andaman Sea to the east of Middle Andaman and carries the only active volcano in India and in South Asia; it has erupted several times in recent decades.
Read the full explanation →Which of the following is the southernmost point of Indian territory?
Indira Point stands at the southern end of Great Nicobar in the Nicobar group and is the southernmost point of the territory of India; it was known earlier as Pygmalion Point and as Parson Point.
Read the full explanation →The Ten Degree Channel separates which two islands?
The Ten Degree Channel runs along the tenth parallel of north latitude and is the dividing line between the Andaman group and the Nicobar group; Little Andaman is the southernmost island of the Andaman group and Car Nicobar the northernmost of the Nicobar group, so the channel lies between them.
Read the full explanation →Which statement about a semiconductor that has been doped is correct?
Doping replaces a few host atoms with impurity atoms, and each impurity atom brings its own nucleus along with its electrons, so the total positive and negative charge in the crystal stays balanced.
Read the full explanation →The transistor was invented in 1947 at Bell Laboratories by:
John Bardeen, Walter Brattain and William Shockley built the first working transistor at Bell Laboratories in 1947 and shared the Nobel Prize in Physics in 1956 for the discovery of the transistor effect.
Read the full explanation →If the input to a full-wave rectifier has a frequency of 50 Hz, the ripple frequency of its output will be:
A full-wave rectifier conducts during both halves of the input cycle, since one pair of diodes handles the positive half and the other pair the negative half.
Read the full explanation →Which pair of logic gates is called universal gates?
They are called universal gates because either one of them, used repeatedly, can build every other logic gate, including NOT, AND, OR, XOR and XNOR.
Read the full explanation →In a bipolar junction transistor, which region is the thinnest and the most lightly doped?
The base of a transistor is made very thin and only lightly doped so that most of the carriers injected by the emitter pass straight through it to the collector instead of recombining in it.
Read the full explanation →Which diode is operated in the reverse breakdown region and is used as a voltage regulator?
A Zener diode is heavily doped so that breakdown occurs at a low and sharply defined reverse voltage. Beyond that point the voltage across it stays almost constant even when the current through it changes a great deal, which is precisely the property a voltage regulator needs.
Read the full explanation →A p-n junction diode is chiefly used in an electronic circuit as a:
A p-n junction conducts freely in forward bias, where the potential barrier is reduced, and blocks current in reverse bias, where only a tiny leakage current flows.
Read the full explanation →The forbidden energy gap of silicon at room temperature is approximately:
Silicon is the most widely used semiconductor and its forbidden energy gap, the separation between the top of the valence band and the bottom of the conduction band, is about 1.1 electron volts at room temperature.
Read the full explanation →In a p-type semiconductor, the majority charge carriers are:
A p-type semiconductor is made by adding a trivalent impurity such as boron, aluminium, gallium or indium.
Read the full explanation →Which of the following impurities, when added to pure silicon, produces an n-type semiconductor?
An n-type semiconductor is made by doping with a pentavalent element, that is one with five valence electrons, such as phosphorus, arsenic, antimony or bismuth.
Read the full explanation →With a rise in temperature, the electrical resistance of a semiconductor:
A semiconductor has a small forbidden energy gap, so heating supplies thermal energy that pushes more electrons from the valence band into the conduction band, creating more electron-hole pairs.
Read the full explanation →Under which law are national parks and wildlife sanctuaries notified in India?
This Act provides for the declaration of national parks and wildlife sanctuaries, lists protected species in its schedules, and, after the amendment of 2002, added two further categories, conservation reserves and community reserves.
Read the full explanation →Which wetland, the largest in northern India, lies at the confluence of the Beas and the Sutlej?
The Harike wetland in Punjab, also called Hari-Ke-Pattan, was formed by a barrage at the point where the Beas joins the Sutlej, is the largest wetland of northern India, and is a Ramsar site rich in waterfowl.
Read the full explanation →The dugong, or sea cow, is best associated with which Indian marine protected area?
The dugong is a marine mammal that grazes on sea grass, and the sea grass beds of the Gulf of Mannar between Tamil Nadu and Sri Lanka are its principal habitat in India; the Gulf of Mannar was declared the country's first marine biosphere reserve in 1989 and the dugong…
Read the full explanation →Salim Ali, known as the Birdman of India, is associated with which of the following?
Salim Ali wrote this standard field guide, carried out the bird surveys on which several sanctuaries were notified, and was long associated with the Bombay Natural History Society; the Salim Ali Centre for Ornithology and Natural History at Coimbatore bears his name.
Read the full explanation →The Ramsar Convention, under which wetlands of international importance are designated, was signed in which year?
The Convention on Wetlands was signed in the Iranian city of Ramsar in 1971, which is why the sites designated under it are called Ramsar sites; it came into force in 1975, India became a party in 1982, and World Wetlands Day is observed on 2 February to mark the…
Read the full explanation →Which Indian wetland and bird area is the only protected sanctuary in the Union Territory of Lakshadweep?
Pitti is a tiny uninhabited coral islet in Lakshadweep, notified as the Pitti Bird Sanctuary, and is the breeding ground of sooty terns and other sea birds; it is the only wildlife sanctuary of the territory.
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