NDA GK Questions 2026

This statement is wrong: soda glass is the soft glass, while pyrex is a hard borosilicate glass. Ordinary soda-lime glass is made from silica (sand), sodium carbonate and limestone; it softens at a fairly low temperature and is used for windows, bottles and tumblers.

Article 231 lets Parliament, by law, set up a common High Court for two or more States, or for two or more States and a Union Territory.

The exosphere, the outermost layer of the atmosphere, is made up mostly of the two lightest gases, hydrogen and helium.

It comes from the Directive Principles of State Policy, which no court can enforce. Article 39(a) asks the State to direct its policy towards securing that citizens, men and women equally, have the right to an adequate means of livelihood.

Crude petroleum is a mixture of hydrocarbons with different boiling points, and fractional distillation separates them. In a refinery, crude oil is heated to about 400 °C and its vapour enters a tall fractionating column that is hot at the bottom and cooler towards the top.

The Quaternary, the latest period of the Cenozoic era, is divided into the Pleistocene and the Holocene epochs. The Quaternary began about 2.58 million years ago.

Of all the sunlight that falls on their leaves, green plants fix only about one per cent as chemical energy in food.

Article 371A protects Naga religious and social practices, customary law and procedure, and land ownership, but says nothing about the State's boundaries.

Diagnostic laboratories spin blood samples in a centrifuge to separate the plasma or serum from the blood cells. In centrifugation a sample is rotated at high speed, so the denser particles are pushed to the bottom of the tube and the lighter liquid stays on top.

The 73rd Amendment gave panchayats constitutional status. The Constitution (Seventy-third Amendment) Act, 1992 came into force on 24 April 1993, the date now marked as National Panchayati Raj Day.

One pascal is defined as a force of one newton acting on an area of one square metre. Pressure is force per unit area, and its SI unit, named after the French scientist Blaise Pascal, is the pascal (Pa): 1 Pa = 1 N/m².

A floating body is stable only when its metacentre lies above its centre of gravity. When a floating body tilts slightly, its centre of buoyancy, the centre of the displaced liquid, shifts to one side.

The crest was designed around the formidable Indian elephant to convey strength, intelligence and agility, the qualities the Navy associates with this class of ship.

The firm built Samarthak under the Government of India's Make in India initiative, and the Navy presents the commissioning as a milestone in the drive towards self-reliance in defence.

Samarthak is the first of four Multi-Purpose Vessels that are joining the Indian Navy, which means three more ships of the same class will be delivered after her.

Samarthak is to be commissioned at Naval Base, Karwar, and the ceremony has been fixed for 16 October 2026. Karwar lies on the Karnataka coast and hosts the base from which the Navy is conducting this induction.

A simple periscope has two plane mirrors facing each other in parallel, each tilted at 45° to the tube. Light from the object enters the top opening and strikes the upper mirror, which is set at 45° and turns the light through 90° down the tube.

The 1971 Census recorded a decadal growth of about 24.8 per cent for 1961–71, the highest of any decade in India's census history.

The amara-nayaka system was the main political innovation of the Vijayanagara Empire, under which military commanders were given territories to govern.

This is false, because variations differ in how well they suit the environment, and that difference is the basis of natural selection.