RRB Group D GK Questions 2026

Arikamedu, on the Ariyankuppam river near Puducherry, is identified with the Poduke of the Periplus and the Poduke emporion of Ptolemy.

Muziris, called Muchiri in Tamil sources, stood near Kodungallur on the Periyar, and the excavations at Pattanam in Ernakulam district have yielded Roman amphora sherds, glass beads and brick structures that fit its description in the Periplus of the Erythraean Sea.

It drained the trade of the Satavahana and Kshatrapa lands through the Narmada and Tapti valleys and sent out cotton cloth, long pepper, spikenard and gems.

Lothal lies in the Bhal region of Gujarat, near the head of the Gulf of Khambhat, and was excavated by S. R. Rao.

The divide between the two great northern systems does not run along a mountain here but across the almost flat plain of Haryana, and Ambala sits on it, so water falling a little to its west goes to the Ghaggar and the Indus side while water falling to its east…

It is the second of the two large west flowing peninsular rivers and runs almost parallel to the Narmada, with the Satpura range between them.

The correct answer is A, the Amarkantak plateau in Madhya Pradesh, where the Narmada rises at about one thousand metres and begins its westward journey of some thirteen hundred kilometres through Madhya Pradesh and Gujarat to the Gulf of Khambhat; on the way it makes the Dhuandhar falls and the…

It flows west through the narrow rift between the Vindhya and the Satpura ranges and opens into the Gulf of Khambhat, where strong tides sweep away the silt, so the river ends in a funnel shaped estuary and not a delta; the Tapi, which also flows west in a rift…

These rivers were flowing when the Himalaya was still rising, and instead of being turned aside they cut downward as fast as the land rose, leaving the gorges of the Indus near Gilgit, of the Satluj at Shipki and of the Brahmaputra at the great bend in the Dihang.

Loktak lies in the floor of the Manipur valley, which is ringed by hills, so the streams of the valley run inward into it from every side, the classic shape of a centripetal pattern; the lake is also known for its floating phumdis and for Keibul Lamjao, the only floating…

It rises at Trimbakeshwar in Nashik district of Maharashtra, runs about one thousand four hundred kilometres across Maharashtra, Telangana and Andhra Pradesh to the Bay of Bengal, and drains about 3.1 lakh square kilometres, the largest catchment in the peninsula, which is why it is called the Ganga of the…

The correct answer is C, the Ganga basin, which covers about 8.6 lakh square kilometres inside India, close to a quarter of the country, and takes in parts of Uttarakhand, Uttar Pradesh, Madhya Pradesh, Bihar, Jharkhand, West Bengal, Haryana, Himachal Pradesh, Chhattisgarh, Rajasthan and Delhi.

In a radial pattern the streams start from a dome, a volcanic cone or a high plateau and run outward in all directions like the spokes of a wheel.

The word comes from the Greek for tree, and the pattern develops where the underlying rock is of uniform hardness and the slope is gentle, so the streams branch freely without being guided by lines of weakness; the tributaries of the Ganga in the northern plain are the standard Indian…

It is the reason one mole of every gas occupies the same 22.4 litres at standard temperature and pressure, and it allowed chemists to settle the formulae of gases such as hydrogen and oxygen as having two atoms each.

When two elements form more than one compound, the masses of one element that combine with a fixed mass of the other bear a simple whole number ratio, and here the oxygen masses of sixteen and thirty two grams for the same twelve grams of carbon are in the ratio…

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.