Defence GK Questions 2026

An insulator is charged by friction: rubbing transfers electrons from one surface to another, and because electrons cannot move through an insulator, the charge stays where it is as static electricity.

The Cartagena Protocol on Biosafety, adopted in January 2000, is named after Cartagena in Colombia, where the negotiations were held in 1999.

In glass, violet light has the shortest wavelength and the highest refractive index, so it bends the most; dispersion is a result of refraction.

Gandhi set up the All India Harijan Sevak Sangh in 1932 to fight untouchability, and he argued that untouchability had no sanction in the Hindu shastras.

By Newton's second law, F = m × a, so a = F ÷ m = 5 N ÷ 10 kg = 0.5 m/s².

In the cytoplasm, glucose is split by glycolysis into two molecules of pyruvate, releasing a small amount of energy as ATP.

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.