Defence GK Questions 2026

Only a transverse wave can be polarised, so the polarisation of light proves that its vibrations are at right angles to the direction of travel.

A nuclear reactor splits heavy atoms; it burns no fuel, so it releases no carbon dioxide and needs no equipment to cut such emissions.

It is a sea level canal: the Mediterranean and the Red Sea stand at almost the same height, so ships sail straight through without being raised or lowered.

Bacteria are prokaryotes, so their DNA lies free in the cytoplasm instead of being packed inside a nucleus. The single circular chromosome sits in a region of the cytoplasm called the nucleoid, which has no nuclear membrane around it.

The Ilbert Bill of 1883 sought to remove the rule that European British subjects could be tried only by European judges.

Vinayak Damodar Savarkar founded Abhinav Bharat at Nashik in 1904, together with his brother Ganesh. It grew out of an earlier group called Mitra Mela and took its name from Mazzini’s Young Italy, whose biography Savarkar translated into Marathi.

Baking soda is sodium hydrogen carbonate, NaHCO3, a mild base made by the Solvay process from brine, ammonia and carbon dioxide.

Melting means breaking the particles free of the forces holding them in a fixed lattice, so a higher melting point means stronger forces of attraction.

Asia takes the largest share of India’s exports, close to half of the total, far ahead of any other continent.

Chadwick discovered the neutron in 1932 and won the Nobel Prize in Physics for it in 1935. He bombarded beryllium with alpha particles and found that the radiation given off was not affected by electric or magnetic fields, yet could knock protons out of paraffin.

Bryophytes live on land but still need water to complete reproduction, so they are called the amphibians of the plant kingdom.

A liquid boils when its vapour pressure equals the pressure of the air pressing on its surface, so lower air pressure means a lower boiling point.

Cones are the photoreceptor cells of the retina that respond to colour in bright light. The human retina carries two kinds of photoreceptors.

The Battle of Talikota, fought in January 1565, broke the Vijayanagara empire. The Deccan sultanates of Bijapur, Golconda, Ahmadnagar and Bidar joined hands against it, and their combined army defeated Aliya Rama Raya, the regent of the Aravidu dynasty, who was captured and killed on the field.

The left atrium is the chamber that receives oxygen-rich blood coming back from the lungs through the pulmonary veins. From there the blood passes the bicuspid or mitral valve into the left ventricle, which pumps it out through the aorta to the whole body.

The troposphere is the lowest layer of the atmosphere, lying right above the Earth's surface, and nearly all weather happens in it.

Dendrites and the axon are the two kinds of processes that grow out of a neuron, the nerve cell that carries messages through the body.

The small intestine is the longest part of the human alimentary canal, about 6 to 7 metres in an adult, which is why it is called the longest organ of the digestive system.

He co-chaired the second Joint Working Group meeting along with Mason Smith, the Permanent Secretary for Defence and Veterans Affairs of Fiji.

As part of the effort to widen specialised military training cooperation, the delegation from Fiji is scheduled to be in Kochi on 29 and 30 September 2026 and will inspect facilities there, with the aim of formalising advanced naval training cooperation and professional aviation training modules.