RRB Group D GK Questions 2026

Water is densest at about 4 degrees Celsius, and 4 plus 273 gives roughly 277 kelvin. Most liquids keep shrinking as they cool, but water behaves oddly: below 4 degrees Celsius it starts to expand again because its molecules begin forming the open, hexagonal pattern of ice.

National Unity Day, or Rashtriya Ekta Diwas, is observed on 31 October, the birth anniversary of Sardar Patel, who was born in 1875 at Nadiad, Gujarat.

Jyotiba Phule founded the Satyashodhak Samaj at Pune on 24 September 1873 to fight caste discrimination and the hold of priests over society.

The 44th Amendment, passed by the Janata Party government of Morarji Desai, took the right to property out of Part III of the Constitution.

Rajatarangini, meaning the river of kings, is a Sanskrit verse chronicle of the rulers of Kashmir written by Kalhana around 1148–1150 CE.

Goa became a full state on 30 May 1987 through the Constitution (56th Amendment) Act and the Goa, Daman and Diu Reorganisation Act, and the day is celebrated every year as Goa Statehood Day.

Zinc has atomic number 30, meaning every zinc atom has 30 protons in its nucleus. It is the last element of the first transition series in period 4 of the modern periodic table, with the electronic configuration [Ar] 3d10 4s2, and it is placed in group 12.

Majuli lies in the Brahmaputra river in Assam, near Jorhat, and is the largest river island in the world. In 2016 it became India's first island district.

A pyrometer measures very high temperatures, such as those of furnaces, kilns and molten metal, without touching the hot object.

Quartzite is formed when sandstone, a sedimentary rock, is changed by great heat and pressure deep inside the earth.

In a food chain each step at which energy is transferred is a trophic level, and secondary consumers stand at the third step.

Gandhi withdrew the movement because it had turned violent, against his principle of non-violence. On 5 February 1922 at Chauri Chaura in Gorakhpur district, a crowd of protesters set fire to a police station after the police fired on them, and 22 policemen died.

The Asian Development Bank has its headquarters in Mandaluyong City, Metro Manila, in the Philippines. It was set up in 1966 to fund development in Asia and the Pacific, and India was one of its founding members.

The Brihadisvara (Brihadeeswarar) Temple at Thanjavur was built by Rajaraja Chola I and completed around 1010 CE, which is why it is also called Rajarajeswaram or the Big Temple.

The Reserve Bank of India started working on 1 April 1935 under the Reserve Bank of India Act, 1934, following the recommendation of the Hilton Young Commission of 1926.

Indira Point on Great Nicobar Island in the Andaman and Nicobar Islands is the southernmost point of Indian territory, at about 6 degrees 45 minutes north latitude.

The UN Security Council has 15 members: 5 permanent members and 10 non-permanent members. The permanent five are the USA, the UK, France, Russia and China, and only they hold the veto.

The Constitution (First Amendment) Act was passed by the provisional Parliament in June 1951, barely seventeen months after the Constitution came into force.

Beriberi is caused by a lack of thiamine, which is vitamin B1. Thiamine helps the body turn carbohydrates into energy and keeps nerves and the heart working, so its shortage weakens muscles and nerves (dry beriberi) or causes swelling and heart failure (wet beriberi).

A person with AB positive blood can receive red cells from every ABO and Rh group, so AB+ is called the universal recipient.