electrolyte

Preparation of hydrogen

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Preparation of hydrogen Hydrogen is the most abundant element in the universe. The sun and other stars are composed largely of hydrogen. Astronomers estimate that 90% of the atoms in the universe are hydrogen atoms. Hydrogen is a component of more compounds than any other element. Water is the most abundant compound of hydrogen found … Read more Preparation of hydrogen

Corossion of metals

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Corrosion is defined as an attack on a material as a result of chemical, frequently electrochemical reaction, with the surrounding medium. According to this definition, the term corrosion can be applied to all materials, including non-metals. But in practice, the word corrosion is mainly used in conjunction with metallic materials. Why do metals corrode? Apart … Read more Corossion of metals

13.06.18 APSC (Assam) Current Affairs

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ASSAM   Centre plans to set up coach maintenance facility in State   The Railway Ministry is considering setting up a coach maintenance facility in Assam.   It is noteworthy that a Coach Refurbishment Unit was approved at Bongaigaon last year with an investment of Rs 150 crore for daily upkeep of new-generation LHB coaches. … Read more 13.06.18 APSC (Assam) Current Affairs

Metallurgy 2

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Metallurgy 2 Roasting It is a process wherein the ore is heated either alone or with some other material in excess of air below the fusion point of the ore. Usually, this method is used for sulphide ores. In roasting, definite chemical changes take place to form oxide or chloride of the metal. Ores of … Read more Metallurgy 2