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प्रश्न
Name the methods by which concentrated ore is converted to metallic oxide.
उत्तर
Roasting and calcinations
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संबंधित प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name one metal which is extracted by reduction with aluminium.
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the metal which is extracted from the ore called 'rock salt'.
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.
(a) Which carbon electrode (cathode or anode) is burnt away?
(b) Why is this carbon electrode burnt away?
Define the term : Flux
Usually ______ ores are subjected to ______ which is done in the absence of air.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
