RRB NTPC GK Questions 2026

Farmyard manure is the decomposed mixture of cattle dung, urine and bedding litter, and in general it carries only about half a per cent of nitrogen, along with roughly the same order of phosphate and potash.

Nitrogen, phosphorus and potassium are the three primary nutrients, and a fertiliser that carries two or more of them in one chemical compound is called a complex or mixed fertiliser; diammonium phosphate, which supplies both nitrogen and phosphate, and the NPK grades sold by number are the familiar examples.

Superphosphate of lime is made by treating rock phosphate with sulphuric acid, and the nutrient it supplies is phosphorus in the form of available phosphate, not nitrogen; it is therefore a phosphatic fertiliser.

For a real object anywhere in front of it, a convex mirror always gives a virtual, erect and diminished image.

Red light has the longest wavelength in the visible spectrum, so glass slows it the least and bends it the least.

Maulana Azad was India's first Education Minister, serving in Jawaharlal Nehru's Cabinet from 1947 until his death in 1958. Azad was a scholar, journalist and Congress leader who had been the youngest president of the Indian National Congress in 1923 and its president again from 1940 to 1946.

For three equal resistors R in parallel, 1/Rp = 1/R + 1/R + 1/R = 3/R, so Rp = R/3.

The brothers Harihara I and Bukka Raya I founded the Vijayanagara Empire in 1336, with its capital on the banks of the Tungabhadra at Hampi.

The force needed equals the rate at which the belt must give horizontal momentum to the falling sand: F = v × (dm/dt) = 2 × 0.1 = 0.2 N. Newton's second law, in its general form, says force equals the rate of change of momentum.

The rulers of Vijayanagara claimed to rule on behalf of the god Virupaksha, a form of Shiva and the guardian deity of Hampi.

These six ceremonial gates belong to the new Parliament House of India in New Delhi. The new Parliament building, part of the Central Vista project, was inaugurated in May 2023.

The Italian scientist Amedeo Avogadro proposed in 1811 that equal volumes of all gases, at the same temperature and pressure, hold the same number of molecules.

A plane mirror always forms an image that stands upright, cannot be caught on a screen, and has its left and right sides swapped.

A black hole forms when a very massive star collapses under its own gravity, and its pull becomes so strong that not even light can escape.

Article 46 asks the State to promote with special care the educational and economic interests of the weaker sections, in particular the Scheduled Castes and Scheduled Tribes.

In uniform circular motion the speed stays the same, but the direction changes at every point, so the velocity keeps changing.

Antibodies are made by B-lymphocytes, a kind of white blood cell, after they meet a foreign antigen. When a germ or other foreign substance enters the body, B-lymphocytes that recognise its antigen multiply and turn into plasma cells.

Vitamin B1 is the chemical called thiamin (also spelt thiamine), the first of the B-complex vitamins to be identified. Thiamin is a water-soluble vitamin that helps the body turn carbohydrates into energy and keeps nerves and the heart working properly.

The Caucasus Mountains run for about 1,100 kilometres from the eastern shore of the Black Sea to the western shore of the Caspian Sea, forming a wall across the isthmus between the two seas.

Ayodhya is not counted among the centres of the Revolt of 1857; in Awadh the rising was centred on Lucknow, the capital.