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प्रश्न
Define the term ore.
उत्तर
Ore: Ore is a type of mineral from which metal can be extracted profitably and conveniently.
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संबंधित प्रश्न
Name the following: Main ore of aluminium.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Give the principles of the froth floatation process.
Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
What is meant by refining of metals? Name the three common methods used for refining.
Which method of refining is used to get 99.8% pure aluminium?
Name a non- metal that has a metallic luster and sublimes on heating.
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Froth floatation process is generally used to concentrate ______ ores.
An alloy is
