NDA GK Questions 2026

The United Nations Conference on Environment and Development, held in June 1992 and popularly called the Earth Summit, opened three agreements for signature: the climate convention, the Convention on Biological Diversity and Agenda 21.

Homi Bhabha designed the programme around the fact that India has modest uranium but very large thorium reserves in the monazite sands of the Kerala coast.

The Tarapur Atomic Power Station was the first nuclear power station in India and also the first in Asia, built with American collaboration and using boiling water reactors, unlike the pressurised heavy water reactors of the later Indian stations.

One becquerel is one disintegration per second, and it is the SI unit of the activity of a radioactive source, named after the discoverer of radioactivity.

In the core of the Sun, at temperatures of millions of degrees, hydrogen nuclei fuse in stages to form helium, and the small amount of mass lost in the process appears as energy according to Einstein's mass-energy relation.

Both absorb neutrons strongly, so pushing the rods into the core removes neutrons and slows the chain reaction, while withdrawing them allows the reaction to build up; this is how the power of a reactor is controlled and how it is shut down.

Heavy water, in which the hydrogen of ordinary water is replaced by deuterium, slows the fast neutrons released in fission to low speeds at which they are far more likely to split further uranium nuclei, and it absorbs very few neutrons in doing so, which is why Indian pressurised heavy…

Gamma radiation is electromagnetic, carries no charge and no rest mass, and therefore passes through matter far more easily than charged particles; thick lead or concrete is needed to reduce it.

An alpha particle takes away two protons and two neutrons, so the parent loses four units of mass number and two units of atomic number and becomes an element two places earlier in the periodic table; uranium-238, for instance, becomes thorium-234.

An alpha particle consists of two protons and two neutrons bound together, which is exactly the nucleus of a helium-4 atom, so it carries a charge of plus two and a mass number of four.

In 1896 Becquerel found that a uranium salt kept in the dark fogged a wrapped photographic plate, which showed that the salt emitted its own penetrating radiation without being exposed to light.

A hydrogen bomb, also called a thermonuclear bomb, works in two steps. A fission explosion of uranium or plutonium produces the temperature of millions of degrees needed to force light nuclei together, and the fusion of those nuclei then releases far more energy than the fission stage alone.

Carbon-14 is the radioactive isotope of carbon used for radiocarbon dating, and its half-life is close to 5,700 years, which is the figure quoted in the question.

The revised procedure keeps this slot free at proof ranges for proof firing of developmental projects sponsored by the Government, including those under iDEX, the Technology Development Fund and the Make route along with other ministry projects, and also for developmental projects that the indigenous defence industry has taken up…

The earlier procedure routed disagreements into arbitration, and the revised version replaces that with a simpler, industry-friendly conciliation clause so that problems faced by domestic manufacturers are settled faster, which the Ministry links to ease of doing business.

The waiver of proof and testing charges for this set of projects is the central financial relief in the revised Standard Operating Procedure, and the stated reason is the promotion of self-reliance in defence.

India began with Low Earth Orbit Search and Rescue, moved on to Geostationary Search and Rescue, and is now progressing towards Medium Earth Orbit Search and Rescue.

At its twenty-fourth meeting the National Maritime Search and Rescue Board looked at how prepared the country is to run rescue operations across this whole stretch of ocean, and discussed technology integration, real-time information sharing, management of distress alerts, vessel tracking and coordination between agencies.

The exercise was inaugurated by the Raksha Rajya Mantri on 7 October 2026 and the sea phase was set to be conducted off Paradip, on the Odisha coast, the next day.

This combination is the heart of the design, because it joins administrative leadership with the youth reach of the MY Bharat platform of the Ministry of Youth Affairs and Sports and the cadet network of the Ministry of Defence.