Static GK decides the General Awareness score in SSC CHSL. Of the 25 questions in Tier-I and the 20 in Tier-II, most come from Indian Polity, History, Geography, the Economy and General Science, the areas the CHSL 2026 notice lists as History, Culture, Geography, Economic Scene, General Policy and Scientific Research relating to India and its neighbouring countries. The level is that of Class 12, so the questions are direct: which article, which river, which ruler, which year. Polity asks about parts and schedules of the Constitution, fundamental rights, the President, Parliament, the Supreme Court and constitutional bodies. History covers the Indus Valley, the Mauryas and Guptas, the Sultanate and Mughal periods, 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 with everyday applications, and Culture covers dances, festivals, monuments and books. This page holds GK24's topic-wise GK notes for SSC CHSL, 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.
The power of a lens of focal length 10 cm is
Power is the reciprocal of focal length in metres, and 10 cm is 0.1 m, so P = 1 ÷ 0.1 = 10 D. The power of a lens measures how strongly it converges or diverges light.
Read the full explanation →An X-ray can be deflected:
X-rays are electromagnetic waves made of uncharged photons, so electric and magnetic fields cannot bend them. Electric and magnetic fields exert force only on charged particles: a charge q feels a force qE in an electric field and qvB in a magnetic field.
Read the full explanation →Which one among the following generation computers used microprocessors in their hardware technology?
Fourth-generation computers, from about 1971, were built around the microprocessor, a whole CPU on a single chip. Computer generations are named after the main switching technology of the time.
Read the full explanation →Which one of the following air pollutants combines with the haemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death?
Carbon monoxide binds with haemoglobin far more strongly than oxygen does, so the blood can no longer carry enough oxygen.
Read the full explanation →Most viruses that infect plants possess
The great majority of plant viruses carry their genes as single-stranded RNA. Viruses contain either DNA or RNA, never both, wrapped in a protein coat.
Read the full explanation →In India, May 21 is observed as
India marks 21 May as Anti-Terrorism Day because former Prime Minister Rajiv Gandhi was assassinated on that day in 1991.
Read the full explanation →While studying vegetation of an area, terms like 'population' and 'community' are often used. Which one of the following statements best describes a population?
In ecology, a population is defined by three things together: one species, one place and one time. Ecology studies life in levels.
Read the full explanation →The number of saturated and unsaturated bonds in cyclohexane are:
Cyclohexane, C 6 H 12, has 6 C–C single bonds and 12 C–H single bonds, 18 single bonds in all and no double or triple bond.
Read the full explanation →Which one of the following pairs of metals are very good conductors of heat?
Silver and copper are the two best conductors of heat among metals. Metals conduct heat because their free electrons carry energy quickly through the solid.
Read the full explanation →The area under the velocity-time graph for a particle moving in a straight line with uniform acceleration gives
Velocity multiplied by time is displacement, so the area between a velocity-time graph and the time axis gives the displacement.
Read the full explanation →Bacteria have an undefined nuclear region which lacks a nuclear membrane and contains only DNA without proteins. Such a region is called:
A bacterium is a prokaryote, so its DNA lies in an irregular region called the nucleoid, with no nuclear membrane around it.
Read the full explanation →Photo 51 refers to an image of
Photo 51 is the X-ray diffraction photograph of DNA that revealed its helical shape. The picture was taken in May 1952 at King's College London by Rosalind Franklin and her student Raymond Gosling.
Read the full explanation →A sound wave travelling at a speed of 330 m/s produces 20 crests and 20 troughs in 0.1 second. The wavelength of the sound wave is:
Twenty crests and twenty troughs make twenty complete waves in 0.1 second, so the frequency is 200 Hz and the wavelength is 330 ÷ 200 = 1.65 m. One complete wave, or one cycle, contains one crest and one trough (for sound, one compression and one rarefaction).
Read the full explanation →Which one of the following is NOT a river covered under the Indus Water Treaty 1960 ?
The Teesta flows from Sikkim through West Bengal into Bangladesh and joins the Brahmaputra, so it has nothing to do with the Indus system.
Read the full explanation →Consider the following statements about the powers and duties of the Comptroller and Auditor General of India : 1. He audits and reports on all expenditures from the Consolidated Fund of India. 2. He controls the issue and receipt of money from the Consolidated Fund of India. 3. He audits and reports on the expenditure of all bodies substantially financed from the Union or State revenues. Which of the statements given above are correct?
The CAG audits spending from the Consolidated Fund and of bodies substantially financed by government, but has no control over the release of money from the fund.
Read the full explanation →Which one among the following events of Indian history was the earliest to take place?
Lord Curzon's partition of Bengal came into effect on 16 October 1905, years before the other three events. Curzon announced the partition in July 1905, claiming it was for administrative convenience, but it was widely seen as a way to divide Hindus and Muslims and weaken Bengali nationalism.
Read the full explanation →Who among the following is empowered to establish Inter State Council under Article 263 of the Constitution of India?
Article 263 lets the President set up an Inter-State Council by order whenever it appears that public interest would be served by it.
Read the full explanation →Which among the following statements about the Jallianwala bagh massacre is/are correct? 1. In Jallianwala bagh troops opened fire upon an unarmed crowd 2. The troops were under the command of General Dyer 3. The troops did not issue any warning to the people before opening fire Select the correct answer using the code given below :
On 13 April 1919 troops fired without any warning on an unarmed crowd in Jallianwala Bagh, Amritsar, on the orders of Brigadier-General Reginald Dyer.
Read the full explanation →Which ministry runs the Department of Posts that organised this campaign?
The correct answer is the Ministry of Communications, under which the Department of Posts functions and which announced the campaign.
Read the full explanation →Where were the postcards written by passengers posted for onward delivery?
Passengers on selected flights received kits containing postcards, wrote their messages during the journey at about 30,000 feet and then dropped the cards into letter boxes that India Post had kept specially at the airports where they landed, from where the cards moved into the normal postal stream for delivery.
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