UPSC Civil Services GK Questions 2026

The human eye responds only to visible light, which lies roughly between 400 nm (violet) and 700 nm (red), and 500 nm is the only one of the three values in that range.

The Fourth Schedule allocates seats in the Rajya Sabha to each State and Union Territory, read with Articles 4(1) and 80(2).

A photographer's flash tube is filled with xenon, which gives an intense burst of white light when a high-voltage spark passes through it.

Mataji Tapaswini founded the Mahakali Pathshala in Calcutta in 1893 to give girls an education rooted in Indian tradition. Tapaswini was a woman ascetic from Maharashtra who settled in Calcutta and won the support of leading Bengali families for her school.

Eratosthenes of Cyrene first used the word "geographia", from the Greek "geo" (earth) and "graphe" (description), so geography means a description of the Earth.

Secularism concerns the relation between the State and religion, and being democratic is not part of its definition. A secular State is not run by a religious order, keeps religious institutions and State institutions apart, and does not favour or persecute any religion.

This statement is false because primary waves pass through solids, liquids and gases alike. Primary or P-waves are longitudinal waves: they push and pull the rock in the same direction in which the wave travels, compressing and stretching the material just as sound waves compress air.

Swami Dayanand Saraswati held the Vedas to be the only true and infallible source of knowledge, and his call was "Go back to the Vedas".

Raiyat, muzarian and asami were all used for the peasant in Mughal-period sources, while majur means a labourer. The Indo-Persian sources of the sixteenth and seventeenth centuries most often called the peasant raiyat (plural riaya) or muzarian; the words kisan and asami also appear.

Liquid nitrogen boils at about −196 °C, cold enough to stop almost all biological activity, and it is cheap, inert and safe to handle.

Chhattisgarh is a long, narrow state that stretches from about 17.8° N in Sukma district to about 24.1° N in Balrampur district, a north-south length of roughly 700 km.

All three features listed, excess salts of sodium, potassium and magnesium, a sandy to loamy texture and their spread in western Gujarat, the eastern deltas and the Sundarbans, describe saline soils.

The Giant Metrewave Radio Telescope (GMRT) is an array of 30 fully steerable parabolic dish antennas, each 45 metres across.

Statements 1 and 3 describe real parts of the Sarnath pillar, while the abacus is neither elliptical nor plain. The Mauryan pillar at Sarnath, set up by Ashoka, had a tall, smooth, tapering shaft of polished Chunar sandstone.

Rutherford's model could not explain why the orbiting electrons do not fall into the nucleus. According to classical physics, a charged particle moving in a circular path is accelerating and must keep radiating energy.

Division is an arithmetic operator that works on numbers, while logical operators work on true and false values. Logical (Boolean) operators take one or more conditions that are either true (1) or false (0) and return a true or false result.

Utnur in present-day Andhra Pradesh is a Neolithic site of the southern Deccan, known for its ash mounds. These ash mounds formed where Neolithic cattle-keepers burnt the dung collected inside large cattle pens, and they belong to the same culture as Kupgal, Kodekal and Piklihal.

The branch office of the Cotton Corporation of India there identified 511 items of electronic waste for disposal through an e-auction on the Government e-Marketplace, with the bids to be opened in the fourth week of the month.

The drive is conducted through that month under the Department of Administrative Reforms and Public Grievances, and it is meant both to speed up the disposal of pending matters and to improve cleanliness in government offices.

It is the nodal department for Special Campaign 6, fixing targets activity by activity and collecting what each ministry achieves, and the photographs taken before and after each cleanliness drive are uploaded to its portal.