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Gaurav Seth 5 years, 3 months ago
बैल को गधे का छोटा भाई कहा गया है क्योंकि बैल भी सीधा-सादा जानवर है। वह भी सहनशील है पर गधे जितना नहीं। बैल सींग चलाकर, अड़ियल रुख अपनाकर तथा कई अन्य तरीके से अपना विरोध एवं असंतोष प्रकट कर देता है।
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Yogita Ingle 5 years, 3 months ago
As per the popular definition, calcination is defined as the process of converting an ore into an oxide by heating it strongly. The ore is heated below its melting point either in absence of air or in a limited supply. This method is commonly used for converting carbonates and hydroxides to their respective oxides. During calcination, moisture and volatile impurities are also removed. Calcination can also be described as a thermal process that is used to convert ores and other solid materials by bringing about thermal decomposition. In calcination, reaction most of the time occurs at or above the thermal decomposition temperature.
Calcination is derived from a Latin word calcinare which translates as “to burn lime”. So, calcination is mostly used in the decomposition of limestone (calcium carbonate) to lime (calcium oxide) and carbon dioxide.
CaCo3 —> CaO + CO2
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Deepshikha Sharma 5 years, 3 months ago
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