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प्रश्न
Define the terms gangue.
उत्तर
Gangue: The impurities like sand, mud, rocky substances etc. that are present in an ore are called gangue.
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संबंधित प्रश्न
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.
Name the gas evolved when cinnabar ore is roasted.
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
State three objectives achieved during the roasting of ores.
Aluminum is used in thermite welding:
write reaction for process?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
In electrolytic reduction of alumina _______ is used as a cathode.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
