What is calcination
Sulphide Ores are converted into oxides by heating in the presence of excess of air.
Carbonate Ores are converted into oxides by heating strongly in excess of air
Sulphide Ores are changed into oxides by heating in Limited supply of air
Carbonate Ores are converted into oxides by heating it in Limited supply of air
Which is the correct answer
A B C D
Answers
Answer:
As per the popular definition, calcination is defined as the process of converting ore into an oxide by heating it strongly. The ore is heated below its melting point either in absence of air or in 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 a thermal decomposition. In calcination, the reaction most of the time occurs at or above the thermal decomposition temperature.
Calcination is derived from a Latin word calculate 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 + CO2B
Meanwhile, the products that are derived from calcination are known as calcining, and it is regardless of actual compounds undergoing thermal treatment
Explanation:
correct answer is B
Answer:
oxides" (and any subsequent words) was ignored because we limit queries to 32 words.
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A sulphide ore is converted into metal oxide by the process of
When we talk about roasting, it is basically a process of metallurgy where ore is converted into its oxide by heating it above its melting point in the presence of excess air. While calcination is mostly used in the oxidation of carbonates, roasting is a method that is used for converting sulphide ores.
Explanation:
The IUPAC defines calcination as "heating to high temperatures in air or oxygen". However, calcination is also used to mean a thermal treatment process in the absence or limited supply of air or oxygen applied to ores and other solid materials to bring about a thermal decomposition.
Calcination, the heating of solids to a high temperature for the purpose of removing volatile substances, oxidizing a portion of mass, or rendering them friable. Calcination, therefore, is sometimes considered a process of purification. Calcination.