Railway GK Questions 2026

The molecular mass of water is eighteen unified atomic mass units, two hydrogen atoms of 1 u each and one oxygen atom of 16 u, so one mole of water weighs eighteen grams.

This standard was adopted so that the atomic masses of all elements could be compared on one relative scale, and on it hydrogen comes out as about 1 u, oxygen as 16 u and chlorine as 35.5 u. Option A is wrong because the hydrogen atom was the standard in…

It follows from Avogadro's law: since equal volumes of all gases at the same temperature and pressure contain an equal number of molecules, one mole of hydrogen, of oxygen or of carbon dioxide all take up the same space at standard temperature and pressure, even though their masses are two…

It is the number of atoms in twelve grams of carbon twelve, and it holds for atoms, molecules, ions or electrons alike, so one mole of water has that many water molecules and one mole of sodium has that many sodium atoms.

Calcium chloride is an ionic compound, so the sum of the atomic masses in its formula is called the formula unit mass rather than the molecular mass.

The formula of ammonia is NH3, so its molecular mass is the atomic mass of one nitrogen atom added to the atomic masses of three hydrogen atoms, that is fourteen plus three times one, which equals seventeen unified atomic mass units; one mole of ammonia therefore weighs seventeen grams.

Water drawn from a river, from rain or made in a laboratory always has hydrogen and oxygen in the mass ratio of one to eight, and ammonia always has nitrogen and hydrogen in the ratio of fourteen to three.

The correct answer is B, Antoine Lavoisier, the French chemist who showed by careful weighing in closed vessels that the total mass of the products of a reaction is exactly equal to the total mass of the reactants, so that matter is neither created nor destroyed in a chemical change.

The Desert Festival is held at Jaisalmer in the month of Magh, in the cool season, with camel races, turban tying competitions, folk music and dance in the sands near the Sam dunes, and it is among the best known tourism events of the state.

The Mallinath cattle fair is held at Tilwara in Barmer district in the month of Chaitra, on the bank of the Luni, and it is the great horse fair of Rajasthan, where animals of the Malani breed are bought and sold; it is named after the folk hero Rao Mallinath.

The dargah of Khwaja Moinuddin Chishti, the founder of the Chishti order in India, is at Ajmer, and the Urs held there in the Islamic month of Rajab is the largest Muslim gathering in Rajasthan, attended by pilgrims of many faiths.

The Elephant Festival is held at Jaipur around Holi, with decorated elephants in procession, and it is one of the tourism festivals promoted by the state.

Gangaur is the worship of Gauri, that is Parvati, with Ishar, that is Shiva, and the name itself joins Gan for Shiva with Gaur for Gauri.

The temple of Karni Mata at Deshnok, about thirty kilometres from Bikaner city, is famous for the rats that live in it and are regarded as sacred, and fairs are held there during the Navratras of Chaitra and of Ashwin.

Gogaji, worshipped across Rajasthan as the deity who protects against snakes, has his principal shrine at Gogamedi in Hanumangarh district, and the fair there is held in the month of Bhadrapad on Gogaji Navami.

The shrine of Baba Ramdev is at Ramdevra, also called Runicha, in the Pokhran tehsil of Jaisalmer district, and the fair there is held in the month of Bhadrapad, drawing pilgrims of every community, since Ramdev is honoured as the saint of the oppressed.

The Baneshwar fair is held in Magh at the Baneshwar temple in Dungarpur district, where the Som meets the Mahi, and because the Bhils of the region gather there in very large numbers it is called the Kumbh of the tribals; it combines the worship of Shiva with the Vaishnav…

The Pushkar fair is held at Pushkar in Ajmer district on the full moon of the month of Kartik, beside the Pushkar lake and the Brahma temple, and it is both a bathing fair and the state's most famous camel and cattle market.

According to the Supreme Court of India, Justice Surya Kant was elevated as a judge of the Supreme Court on 24 May 2019 and was sworn in as the fifty-third Chief Justice of India on 24 November 2025, with retirement due on 9 February 2027.

Justice Y. V. Chandrachud was Chief Justice of India from 1978 to 1985 and his son, Justice D. Y. Chandrachud, became the fiftieth Chief Justice of India in November 2022, the only instance of a father and a son both holding the office.