UKPCS Prelims and Mains Notes-UKPSC Test Series
INTERNATIONAL 26th BASIC Ministerial meeting of Environment Ministers in Durban The 26th BASIC Ministerial Meeting of Environment Ministers was held in Durban, South Africa for co-operation to protect the climate for present and future generations. The BASIC grouping is a bloc of four countries – Brazil, South Africa, India and China – … Read more 23.05.18 Uttarakhand (UKPCS) Current Affairs
Alloy You might see the word alloy described as a “mixture of metals”, but that’s a little bit misleading because some alloys contain only one metal and it’s mixed in with other substances that are nonmetals (cast iron, for example, is an alloy made of just one metal, iron, mixed with one nonmetal, carbon). The … Read more Alloy
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
Shakas had set up their Kshsatraps in Mathura. The brahmi inscription s of Mora(Mathura ) is associated with Sakas. The Sakas conquered the area of Mathura over Indian kings around 60BCE. Some of their satraps were Hangamasha and Hagana, who were in turn followed by the Saka Great Satrap Rajuvula. The Mathura Lion Capital inscriptions … Read more Sakas
Metallurgy of Copper Copper Mining: The commonest ore used in the extraction of copper is Chalcopyrite (CuFeS2) also known as Copper Pyrites and other such sulfides. The percentage of copper in the actual ore is too low for direct extraction of copper to be viable. The concentration of ore is required and it is done by the Froth … Read more Metallurgy of Copper
Origins According to the Rajput bards, Chauhan is one of the four Agnikula or ‘fire sprung’ clans who were created by the Gods in the anali kund or ‘fountain of fire’ on Mount Abu to fight against the Asuras or demons. Chauhan is also one of the 36 ruling races of the Rajputs. Agnikula origin … Read more Chauhan for UKPCS Mains
Laboratory method of preparing alcohol Hydrolysis of Alkyl Halides This is a nucleophilic substitution reaction. R-X + KOHaq → R-OH The method is not satisfactory as olefins are also formed as by-products. However better yields is obtained by using moist Ag2O or aqueous K2CO3. Tertiary butyl halides mainly gives alkene due to dehydrohalogenation. Hydration of Alkenes This … Read more laboratory method of preparing alcohol
Preparation of nitrogen Nitrogen is found in both free and combined states. It occupies 78.07% by volume. Nitrogen can be prepared: By heating copper in air: Firstly, air is passed through lime water and then concentrated sulphuric acid to make the air free from carbon dioxide and moistures respectively. The air contains only nitrogen … Read more Preparation of nitrogen
Ore An ore is a special type of rock that contains a large enough amount of a particular mineral (usually a metal) to make it economically practical to extract that mineral from the surrounding rock. Not all minerals are found in a large enough amount in one location to make it worth it to remove the ore … Read more Ore
Metallurgy concentration, roasting, smelting 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. … Read more Metallurgy concentration, roasting, smelting