Science Abbreviations MCQ questions and answers | GK Abbreviations

Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.

Aspirin, also known as acetylsalicylic acid (ASA), is a medication used to reduce pain, fever, or inflammation. Specific inflammatory conditions which aspirin is used to treat include Kawasaki disease, pericarditis, and rheumatic fever.

Aspartate (ASP) is a vitamin-like substance called an amino acid. As a dietary supplement, aspartate is combined with minerals and is available as copper aspartate, iron aspartate, magnesium aspartate, manganese aspartate, potassium aspartate, and zinc aspartate.

Aromatic polyimides (API) are a special group of engineering organic materials, which are classified as high performance polymers, because of their excellent thermal, mechanical and chemical properties

Antidiuretic hormone (ADH) is a hormone that helps your kidneys manage the amount of water in your body. The ADH test measures how much ADH is in your blood. This test is often combined with other tests to find out what is causing too much or too little of this hormone to be present in the blood.

Analytical Reagent (AR) is a chemical compound of a known high standard of purity.

An atomic mass unit (AMU) is defined as a mass equal to one twelfth the mass of an atom of carbon-12. The mass of any isotope of any element is expressed in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu. An atom of sulfur-32 has a mass of 31.972 amu.

An airborne early warning and control (AEW&C) system is an airborne radar picket system designed to detect aircraft, ships, vehicles, missiles, and other incoming projectiles at long ranges and perform command and control of the battlespace in an air engagement by directing fighter and attack aircraft strikes. AWACS (Airborne Warning and Control System) is the name of the specific system installed in the E-3 and Japanese Boeing E-767 AEW&C airframes, but is often used as a general synonym for AEW&C.

Ammonium sulfate is an inorganic sulfate salt obtained by reaction of sulfuric acid with two equivalents of ammonia. A high-melting (decomposes above 280?) white solid which is very soluble in water (70.6 g/100 g water at 0?; 103.8 g/100 g water at 100?), it is widely used as a fertilizer for alkaline soils.

Ammonium nitrate (AN) is a crystal-like white solid which is made in large industrial quantities. Its biggest use is as a source of nitrogen for fertiliser, but it is also used to create explosives for mining.