Static GK in railway exams starts with one shared block: Class 10 science. Every RRB exam on GK24 tests it. Group D has 25 questions on Physics, Chemistry and Life Sciences of 10th CBSE level. JE has 30 in CBT-1 and another 15 on Physics and Chemistry in CBT-2. ALP tests General Science in CBT-1 and Basic Science and Engineering in CBT-2, and NTPC lists general science up to 10th inside General Awareness. Beyond science, the lists differ. NTPC names history and the freedom struggle, geography, polity, the economy, art and culture, environment, computers, abbreviations, transport systems in India, world organisations and government bodies. JE names geography, history and culture, polity, the economy and environmental issues, and adds computers and pollution control in CBT-2. This page holds GK24's topic-wise GK notes for railway exams in English and Hindi: General Science, History, Geography, Polity, Economy, Art and Culture, Environment, Computers and static GK, including Indian Railways. Each note is short facts and tables that can be revised in one sitting. Begin with the science notes, since they serve every railway exam, then add the static topics your exam lists, and test each note with its quiz.
Basic scientific principle behind a nuclear reactor is
A nuclear reactor splits heavy nuclei such as uranium-235 in a chain reaction that is kept under control, releasing heat at a steady rate.
Read the full explanation →Mitochondria are able to produce their own
Mitochondria have their own DNA and their own ribosomes, so they can make some of the proteins they need. Mitochondria are the "powerhouses of the cell", where food is broken down in aerobic respiration to release energy stored as ATP.
Read the full explanation →The sound created in a big hall persists because of the repeated reflections. The phenomenon is called
Reverberation is the lingering of sound in a closed space caused by many reflections from the walls, ceiling and floor.
Read the full explanation →For an element with atomic number 35, which one of the following will be the correct number of electrons in its valence shell based on Bohr's model of an atom?
The element with atomic number 35 is bromine, whose 35 electrons are arranged as 2, 8, 18, 7, leaving seven in the outermost shell.
Read the full explanation →Ms. Rani decides to convert her AC generator into a DC generator. Which one of the following she would need to use ?
A split-ring commutator reverses the coil's connection to the outer circuit every half turn, so the current outside flows in one direction only.
Read the full explanation →Organisms of which of the following phylum are called sponges ?
Sponges belong to the phylum Porifera, a name that means "pore bearers", because their bodies are full of tiny pores.
Read the full explanation →Which one of the following nitrogen oxides may dimerize ?
Nitrogen dioxide has an unpaired electron, so two of its molecules join to form dinitrogen tetroxide, N 2 O 4.
Read the full explanation →Consider the following statements : I. A solution of iodine in ethanol known as 'tincture of iodine' is a heterogeneous mixture. II. A suspension is a heterogeneous mixture and its particles scatter a beam of light passing through it, making its path visible. III. A colloidal solution, although it appears homogeneous, is a heterogeneous mixture. Which of the statements given above are correct ?
Tincture of iodine is a true solution, which is homogeneous, so statement I is wrong, while II and III are right.
Read the full explanation →Under Section 110 of which Act were the smuggled cigarettes and the truck seized?
Section 110 of that Act lets a customs officer seize goods believed liable to confiscation, and it was used to take the 43.2 lakh foreign-origin cigarettes and the truck carrying them in Mizoram.
Read the full explanation →At which Mizoram village was the truck carrying the smuggled cigarettes intercepted?
Officers of the Aizawl Regional Unit of the Directorate of Revenue Intelligence mounted surveillance along the Champhai-Aizawl Road and stopped the truck at Tuirial village, where a search produced 432 cases containing 43.2 lakh cigarette sticks of the Patron brand worth Rs 8.64 crore.
Read the full explanation →What was the value of the foreign-origin cigarettes seized by the DRI in Mizoram?
The Directorate of Revenue Intelligence put that value on the 43.2 lakh foreign-origin cigarette sticks it seized in Mizoram, a haul of 432 cases of the Patron brand recovered from a truck.
Read the full explanation →Under which law were the ganja consignment and the truck carrying it seized?
Ganja is a narcotic drug, so the 591.3 kg recovered in Uttar Pradesh and the truck in which it travelled were both seized under that statute, which governs narcotic and psychotropic offences in India and allows the conveyance used in the crime to be taken as well.
Read the full explanation →Through which border crossing was the seized ganja consignment expected to enter Uttar Pradesh?
The intelligence that set off the operation said the truck carrying ganja from Nepal would come into Uttar Pradesh through Sonauli, so officers of the Directorate of Revenue Intelligence at Gorakhpur built their surveillance around that crossing, helped by teams at Lucknow, Patna and Varanasi.
Read the full explanation →How much ganja did the Directorate of Revenue Intelligence seize in its Uttar Pradesh operation of 17-18 October 2026?
The Directorate of Revenue Intelligence seized 591.3 kg of ganja from a truck in Uttar Pradesh in an operation carried out during 17 and 18 October 2026.
Read the full explanation →Where is the Indian Naval Academy, one of the institutions CDS (II) 2026 qualifiers may join?
The Indian Naval Academy, whose course for Combined Defence Services Examination (II) 2026 qualifiers begins in July 2027, stands at Ezhimala in Kerala.
Read the full explanation →The 163rd Direct Entry Course of the Indian Military Academy, open to CDS (II) 2026 qualifiers, begins in which month and year?
The Indian Military Academy at Dehradun starts its 163rd Direct Entry Course in July 2027, and the qualifiers of the Combined Defence Services Examination (II) 2026 are interviewed for admission to it.
Read the full explanation →How many candidates qualified in the written stage of the Combined Defence Services Examination (II) 2026?
The Union Public Service Commission declared the written result of the Combined Defence Services Examination (II) 2026 and named 8,956 candidates as qualified for the interview conducted by the Service Selection Board of the Ministry of Defence.
Read the full explanation →Plants adapted to grow in deserts and other dry habitats are called
Xerophytes are plants adapted to live in deserts and other places with very little water; the Greek word "xeros" means dry.
Read the full explanation →Consider the following statements about genetic engineering:
1. The technique of genetic engineering involves creation of recombinant DNA, use of gene cloning and gene transfer.
2. Restriction enzymes cut DNA at specific locations.
3. Restriction enzymes split the entire double-stranded DNA into two strands.
Which of the statements given above is/are correct?
Genetic engineering uses recombinant DNA, cloning and gene transfer, and restriction enzymes cut DNA at specific sites; but they do not unzip DNA into two strands, so statement 3 is wrong.
Read the full explanation →Which one of the following diseases is caused by Cadmium pollution?
Itai-itai disease is caused by cadmium poisoning and was first reported in Japan. In the early 20th century, mining waste from upstream released cadmium into the Jinzu river in Toyama Prefecture, Japan.
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