CDS GK Questions 2026

Under the Mughal mansabdari system, every officer held a numerical rank called zat, which fixed his position in the hierarchy and his personal salary.

Almost all water vapour and dust of the atmosphere lie in the troposphere, so clouds, rain, storms and other weather events happen there.

Living things are built up level by level: molecules such as proteins form cells, cells form tissues, tissues form organs, organs form organ systems, and these together make an organism.

A playa is the flat, shallow lake bed at the bottom of a desert basin, so it belongs to the landforms of arid regions.

pH falls, not rises, as hydrogen ion concentration rises, so a more acidic solution has a lower pH. pH is defined as the negative logarithm of the hydrogen ion concentration: pH = −log[H⁺].

E. V. Ramasamy, known as Periyar, started the Self-Respect Movement in Tamil Nadu in 1925. Periyar left the Congress in 1925, unhappy with its attitude to caste, and began the movement to give non-Brahmins and the depressed castes a sense of dignity.

Treating rock phosphate, which is insoluble calcium phosphate, with sulphuric acid gives superphosphate of lime, a fertiliser whose phosphorus plants can absorb.

A nitrogen molecule, N₂, is diatomic, not triatomic; its two atoms are joined by a triple bond, and the molecules attract each other only weakly.

The Food Safety and Standards Authority of India is the statutory body that lays down standards for food and regulates its manufacture, storage, sale and import across India.

Uric acid is the end product of the breakdown of purines, which come from the nucleic acids DNA and RNA, so gout patients are told to cut down purine-rich food.

It is called dry ice because, at ordinary pressure, it changes directly from solid to gas (sublimation) instead of melting, so it never makes anything wet.

The Scottish painter Joseph Noel Paton painted "In Memoriam" in 1858 in response to the revolt of 1857. The painting shows British women and children huddled together, clutching the Bible and waiting helplessly for an attack, an image meant to recall the killings at Kanpur (Cawnpore).

Tin is a chemical element (symbol Sn, atomic number 50), a pure substance made of only one kind of atom, so it is not a mixture.

Deendayal Port is the new name of Kandla Port, which lies on the Gulf of Kachchh in the Kachchh district of Gujarat.

Air is optically rarer than water, so light speeds up, not slows down, when it passes from water into air.

The Indian Factories Act of 1881, passed under Viceroy Lord Ripon, was mainly about child labour and capped the working day of children aged 7 to 12 at nine hours.

When the force acts opposite to the displacement, the angle between them is 180°, and work W = F d cos 180° = −F d. Work done by a force is the product of the force, the displacement and the cosine of the angle between them.

Lymph forms when plasma leaks out of blood capillaries into the spaces between cells, so it is essentially plasma with less protein and no red blood cells.

Kanaklata Barua was shot dead by the police on 20 September 1942 while leading a procession to hoist the tricolour at the Gohpur police station in Assam.

The geographical grid is the network of parallels of latitude, running east to west, and meridians of longitude, running from the North Pole to the South Pole.