Railway GK Questions 2026

Heat is energy in transit: it flows from a hotter body to a colder one only because their temperatures differ, and stops when they reach the same temperature.

The SI unit of inductance is the henry, symbol H, named after the American scientist Joseph Henry. Inductance measures how strongly a coil opposes a change in the current through it by producing an induced emf.

Plaster of Paris is calcium sulphate hemihydrate, CaSO₄·½H₂O, so one molecule of water is shared by two formula units of calcium sulphate, written (CaSO₄)₂·H₂O. It is made by heating gypsum, CaSO₄·2H₂O, to about 373 K (100 °C), when gypsum loses one and a half molecules of water per formula unit.

In the order visible light → ultraviolet → X-rays, the wavelength falls and the photon energy rises, so statements 1 and 2 are true and 3 is false.

In 1905 Einstein explained the photoelectric effect by treating light as made of packets of energy, later called photons, and he received the 1921 Nobel Prize in Physics for this work.

Light inside an optical fibre strikes the wall at more than the critical angle, is totally reflected back inside, and repeats this again and again along the fibre.

Fly ash is the fine powdery residue left after coal is burnt in thermal power stations; it is a mixture of oxides, not a pure form of carbon.

Urea, CO(NH₂)₂, contains carbon, oxygen, nitrogen and hydrogen; it has no phosphorus at all and is a nitrogenous fertilizer. Urea carries about 46% nitrogen, the highest of the common solid fertilizers, which is why it is the most widely used fertilizer in India.

X-rays are not used in radar; radar works with microwaves, which have wavelengths of a few centimetres. X-rays lie between ultraviolet rays and gamma rays in the electromagnetic spectrum, with wavelengths from about 10 nm down to 0.01 nm, so about 1 Å (0.1 nm) is typical.

It is an inorganic salt made of the ammonium ion and the cyanate ion, with no carbon–hydrogen bonds. Ammonium cyanate is famous in chemistry because in 1828 Friedrich Wöhler heated it and obtained urea.

Pairs I, II and IV describe the electron transfer correctly; pair III calls bromine a reductant when it is the oxidant.

Boiling an oil or fat with an alkali splits it into glycerol and the salts of its fatty acids; with potassium hydroxide those salts are potassium salts.

He won bronze in the Men’s Shot Put F11 event at the Asian Para Games 2026, and the Prime Minister said the achievement reflected his courage, his preparation and his dedication.

Pradeep Kumar finished second in the Men’s Javelin Throw F53/54 event at the Asian Para Games for the second time in a row, and on this occasion the medal came with a personal best as well.

Both stood on the podium in the same Men’s Javelin Throw F53/54 event on 20 October 2026, Pradeep Kumar taking the silver and Ayush Verma the bronze, and each of them recorded a personal best.

The correct answer is that he asked people to report the drug trade on the Narcotics Control Bureau’s toll-free helpline, saying that the government would act on the information the public provided.

The effigy burnt by Amit Shah at Ludhiana on 20 October 2026 was described as the symbolic Ravana of chitta, which let the festival’s central idea, the victory of good over evil, carry a message about the drug trade in Punjab.

Speaking at the Vijayadashami festival in Ludhiana on 20 October 2026, the Union Home Minister said the resolve taken that day was to free the whole of Punjab from the drug trade by that date and to make the state drug-free, and he described it as the greatest tribute possible…

Manish Narwal took the silver in the men’s event and Shrishti Arora the bronze in the women’s event, so the distance, the weapon and the class code are identical and only the section and the colour of the medal differ.

Shrishti Arora secured the bronze in the Women’s 10m Air Pistol SH1 event on 20 October 2026 while competing at the Games for the first time, and the Prime Minister described the medal as a wonderful beginning, saying he was confident she would continue to make the nation proud.