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प्रश्न
The process by which sulphide ore is concentrated.
उत्तर
Froth floatation
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संबंधित प्रश्न
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Define the term : Slag
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Froth floatation process is generally used to concentrate ______ ores.
Explain the concept of Roasting.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Identify the substance oxidised and reduced in the above reaction.
