RRB NTPC GK Questions 2026

Gerd Binnig and Heinrich Rohrer built it at the IBM laboratory in Zurich in 1981; a sharp metal tip is moved a fraction of a nanometre above a conducting surface and the quantum tunnelling current between tip and sample maps the atoms one by one, work that brought them the…

The Nobel Prize in Chemistry of 2023 went to Moungi Bawendi, Louis Brus and Alexei Ekimov for the discovery and synthesis of quantum dots, semiconductor nanocrystals whose emitted colour depends on their size because of quantum confinement, and which are used in television displays, in light emitting diodes and as…

In 1911 the Dutch physicist Heike Kamerlingh Onnes, who had already liquefied helium, cooled mercury to about four kelvin and found that its electrical resistance vanished completely, which is the discovery of superconductivity and won him the Nobel Prize in Physics in 1913.

Nitinol is an alloy of roughly equal parts nickel and titanium, and even its name records this, being formed from nickel, titanium and the Naval Ordnance Laboratory where it was developed.

The Nano Mission, formally the Nano Science and Technology Mission, was launched in 2007 under the Department of Science and Technology, which had already been running the Nano Science and Technology Initiative since 2001, and the mission works on basic research, human resources, infrastructure and the transfer of results to…

Andre Geim and Konstantin Novoselov of the University of Manchester shared the Nobel Prize in Physics in 2010 for groundbreaking experiments on graphene, the single atom thick sheet of carbon they had lifted from graphite with ordinary adhesive tape.

The Japanese physicist Sumio Iijima, then at the NEC laboratory, reported multi walled carbon nanotubes in 1991 using a transmission electron microscope, and the date and the name are the facts asked.

Buckminsterfullerene, discovered in 1985, has sixty carbon atoms arranged in a closed cage of twenty hexagons and twelve pentagons, exactly the pattern of a stitched football, and the twelve pentagons are what allow a flat hexagonal sheet to curve into a closed ball.

The American physicist Richard Feynman delivered the talk There's Plenty of Room at the Bottom to the American Physical Society at Caltech in December 1959, in which he argued that there is no law of physics forbidding the manipulation of individual atoms, and the lecture is treated as the conceptual…

The Japanese engineer Norio Taniguchi used the word nanotechnology in 1974 to describe machining to tolerances of a nanometre, and that is the coinage examiners expect.

The prefix nano stands for ten raised to the power minus nine, so one nanometre is one billionth of a metre, which is also ten angstrom, and nanotechnology is defined as work in the band of one to one hundred nanometres.

Kalpakkam, on the coast south of Chennai, carries the Madras Atomic Power Station with its two indigenous pressurised heavy water reactors and the Indira Gandhi Centre for Atomic Research, the centre of India's fast breeder reactor programme under the Department of Atomic Energy.

Coimbatore, on the Noyyal river below the Palakkad Gap, earned the name from its cotton mills, textile machinery works and pump industry, and the nearby Tiruppur is the knitwear and hosiery centre.

The Thirukkural of the poet Thiruvalluvar has 1,330 couplets arranged in 133 chapters of ten each, grouped into three parts on virtue, wealth and love, and the 133 foot statue of Thiruvalluvar off Kanyakumari records those 133 chapters.

On 10 July 1806 the Indian sepoys of the garrison at Vellore in present day Tamil Nadu rose against their British officers over new regulations on dress, beards and caste marks, and the rising, though crushed within a day, is remembered as the first major mutiny of Indian soldiers, half…

The Nilgiri Biosphere Reserve, notified in 1986, was the first biosphere reserve in India and spreads across Tamil Nadu, Kerala and Karnataka, taking in Mudumalai, Mukurthi, Bandipur, Wayanad and Silent Valley.

The Nilgiri tahr, a wild goat found only on the higher slopes of the Western Ghats in Tamil Nadu and Kerala, is the state animal of Tamil Nadu, and the Mukurthi national park and the Anamalai hills are its strongholds.

Tamil Nadu elects 39 members to the Lok Sabha and 18 to the Rajya Sabha, and its Legislative Assembly has 234 seats; the Legislative Council was abolished in 1986, so the legislature is unicameral.

The Kallanai, called the Grand Anicut by the British, was built across the Kaveri near Tiruchirappalli by the early Chola king Karikala, and it still spreads the river's water across the delta of Thanjavur, which is why that delta is called the rice bowl of Tamil Nadu.

Mahabalipuram or Mamallapuram, the port town of the Pallavas on the Coromandel coast, carries the rock cut Pancha Rathas and the relief called Arjuna's Penance from the reign of Narasimhavarman I, and the structural Shore Temple from that of Narasimhavarman II, Rajasimha; the group was inscribed as a World Heritage…