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प्रश्न
Define the Ore.
Define the following term.
Ore
उत्तर १
Minerals from which metals can be extracted profitably are known as ores.
उत्तर २
If minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These minerals are called ores.
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संबंधित प्रश्न
Name the following: Main ore of aluminium.
The process by which sulphide ore is concentrated.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Give the name and chemical formula of one ore of copper.
Name the gas produced when calamine ore is calcined.
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Which metal is extracted from calamine ore?
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Give the chemical formula of :
Bauxite
Name the following:
The process of heating an ore to a high temperature in the presence of air.
State three objectives achieved during the roasting of ores.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Explain the concept of Roasting.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
