RRB NTPC GK Questions 2026

Article 21-A was inserted by the Constitution (86th Amendment) Act, 2002, making free and compulsory education for children aged six to fourteen a Fundamental Right.

Article 154 says the executive power of a State is vested in the Governor, who exercises it directly or through officers under him, exactly as Article 53 does for the President at the Centre.

Magnification is a ratio of two lengths, so the units cancel and it is a pure number. For a mirror or a lens, magnification m equals the height of the image divided by the height of the object (h′/h).

A ray that passes through the optical centre of a thin lens comes out in the same direction, without any bending.

Red cabbage is a natural acid-base indicator, methyl orange is a synthetic acid-base indicator, and onion and clove are olfactory indicators.

The d-block occupies the middle of the modern periodic table, groups 3 to 12, and its members are also called transition elements.

A red blood cell is a biconcave disc, thin in the middle and thick at the edge, not an amoeboid cell.

Mercury (Hg) belongs to group 12, not group 11. Group 11 of the modern periodic table holds copper (Cu, atomic number 29), silver (Ag, 47) and gold (Au, 79).

Platelets are the tiny cell fragments that rush to a cut and start the clot. They are also called thrombocytes and are made in the bone marrow from large cells called megakaryocytes.

Thiamin (thiamine) is vitamin B1, a water-soluble vitamin that helps the body turn carbohydrates into energy and keeps the nerves and heart working well.

In 1831 the British scientist Michael Faraday showed that a changing magnetic field produces an electric current in a nearby coil.

All three are Indian football tournaments. The Durand Cup, first played in 1888 and named after Sir Mortimer Durand, then Foreign Secretary of British India, is Asia's oldest football tournament and is still organised with the help of the armed forces.

Bharatanatyam grew out of Sadir Attam, also called Dasiattam, the temple dance performed by devadasis in Tamil Nadu. In the early 19th century the Tanjore Quartet, four brothers at the Thanjavur court, arranged its items into the order still followed in a recital.

The German zoologist Ernst Haeckel coined the word 'Oekologie' in 1866 in his book Generelle Morphologie der Organismen.

It means the layering of an ecosystem from top to bottom, with each layer holding its own set of species.

It was the first working satellite of the Indian National Satellite (INSAT) system, carried to orbit by the US Space Shuttle Challenger in August 1983.

The Hirakud dam stands on the Mahanadi near Sambalpur in Odisha. Completed in 1957, it was among the first big multipurpose river valley projects after Independence, built to control the Mahanadi's floods and to give irrigation and hydroelectric power.

China's capital hosted the Summer Olympics in 2008 and the Winter Olympics in 2022, which made it the first city ever to stage both.

One ampere is the current that flows when one coulomb of charge passes a point in a circuit in one second.

The symbol of potassium is K, from its Latin name kalium; Po is the symbol of polonium, the radioactive element discovered by Marie Curie in 1898 and named after Poland.