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प्रश्न
Write the name.
The process of strong heating of carbonate ores in insufficient air–
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उत्तर
The process of strong heating of carbonate ores in insufficient air– Calcination
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संबंधित प्रश्न
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Why do gold ornaments look new even after several years of use?
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Define the term mineral.
Name two metals which are always found in combined state.
What is the difference between a mineral and an ore?
Name three other metals which are extracted in a manner similar to sodium.
Name the electrode at which aluminium metal is produced.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
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 following term.
Mineral
Define the term:
Flux
How are metals refined by the electrolytic methods?
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
