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प्रश्न
State three objectives achieved during the roasting of ores.
उत्तर
- It removes moisture from the ore.
- It expels oxide.
- It oxidises sulphide ores to oxide ores.
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संबंधित प्रश्न
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
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(a) copper
(b) mercury
(c) aluminium
(d) zinc
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Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
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write reaction for process?
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
In electrolytic reduction of alumina _______ is used as a cathode.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
