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प्रश्न
Write the name.
The process of extraction of aluminium from alumina-
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उत्तर
The process of extraction of aluminium from alumina- Electrolytic reduction
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संबंधित प्रश्न
Define the Ore.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Write the composition of the alloy called bronze.
Why does aluminium not corrode right through?
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Name the metal which is extracted from haematite ore.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Which metal is extracted from bauxite ore?
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Name the following:
Name two metals always find in combined state.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Explain Bayer’s process.
Explain the characteristics of ionic compounds.
Complete flow chart given below.
