General Quiz

Jai Ganesh · 2025-02-13 15:55:34

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#10245. Name the French chemist (1 January 1852 – 5 March 1903) who designed an apparatus to produce a spark using an induction coil and used it to generate the spectra of rare earth elements which he examined using spectroscopy, thus detecting the element europium in 1896, and isolated it as the oxide europia in 1901. He helped Marie Curie to confirm the existence of another new element, radium, in 1898.

10246. Name the German chemist (19 February 1799 – 27 April 1882) who co-discovered indium in 1863 with Hieronymous Theodor Richter.

He was born in Bernburg, Anhalt-Bernburg, Holy Roman Empire and died in Freiberg. He was color blind, or could only see in whites and blacks, and that is why Theodor Richter became his science partner. Richter would examine the colors produced in reactions that they studied.

Jai Ganesh · 2025-02-14 16:01:48

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#10247. Name the French chemist (14 July 1874 – 31 August 1949). He is often considered the discoverer of the element actinium, though H. W. Kirby disputed this in 1971 and gave credit instead to German chemist Friedrich Oskar Giesel.

#10248. Name the American nuclear physicist (June 15, 1912 – July 3, 2002). Together with Dale R. Corson and Emilio Segrè, he synthesized the element astatine, in 1940. He received his PhD under Ernest Lawrence at Lawrence Livermore National Laboratory. Lawrence, he, and their colleagues devised the first cyclotron.

Jai Ganesh · 2025-02-15 15:23:58

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#10249. Name the term in Chemistry: Phenomenon of attracting and holding water molecules via either absorption or adsorption from the surrounding environment, which is usually at normal or room temperature. If water molecules become suspended among the substance's molecules, adsorbing substances can become physically changed, e.g. changing in volume, boiling point, viscosity or some other physical characteristic or property of the substance.

It is essential for many plant and animal species' attainment of hydration, nutrition, reproduction and/or seed dispersal. Biological evolution created hygroscopic solutions for water harvesting, filament tensile strength, bonding and passive motion – natural solutions being considered in future biomimetics.

#10250. Name the term in Life Science: A term referred to the special characteristic of having two different kinds of nuclei in a cell. There are many differences between the types of nuclei. This feature is observed in protozoan ciliates, like Tetrahymena, and some foraminifera. Ciliates contain two nucleus types: a macronucleus that is primarily used to control metabolism, and a micronucleus which performs reproductive functions and generates the macronucleus.

Jai Ganesh · 2025-02-16 15:49:36

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#10251. Name the term in Chemistry: Any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution, elimination, and solvation reactions in which water is the nucleophile.

#10252. Name the term in Chemistry: Form of water in which hydrogen atoms are all deuterium that makes up most of the hydrogen in normal water. The presence of the heavier isotope gives the water different nuclear properties, and the increase in mass gives it slightly different physical and chemical properties when compared to normal water.

Deuterium is a heavy hydrogen isotope. Heavy water contains deuterium atoms and is used in nuclear reactors. Semiheavy water (HDO) is more common than pure heavy water, while heavy-oxygen water is denser but lacks unique properties. Tritiated water is radioactive due to tritium content.

Jai Ganesh · 2025-02-17 15:11:24

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#10253. Name the term in Chemistry: It is water that has a high mineral content. It is formed when water percolates through deposits of limestone, chalk or gypsum, which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.

#10254. Name the term in Chemistry: A chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds. It typically constitutes the addition of pairs of hydrogen atoms to a molecule, often an alkene. Catalysts are required for the reaction to be usable; non-catalytic of these takes place only at very high temperatures. They reduces double and triple bonds in hydrocarbons.

Jai Ganesh · Yesterday 15:58:18

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#10255. What does the term in Physics: A type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or "decays" into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two. An alpha particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons.

#10256. What does the term in Physics mean? A periodic variable is a measure of its change in a single period (such as time or spatial period). There are various definitions of amplitude (which are all functions of the magnitude of the differences between the variable's extreme values.)

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#8276 2025-02-13 15:55:34

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