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प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
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उत्तर
The process of concentration of bauxite is known as Bayer’s process.
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संबंधित प्रश्न
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Name the most abundant metal in the earth’s crust.
Name one metal which is extracted by:
Electrolytic reduction.
Bronze is an alloy of copper and ______.
Name the method by which aluminium metal is extracted.
How is aluminium metal extracted? Explain with the help of an equation.
The two metals which are extracted by means of electrolytic reduction of their molten salts are ______.
Give reasons, why aluminum is used in:
In making ships
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Zinc blende is converted to oxide by ______ process.
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
In extraction of copper, the flux used is ____________.
An alloy is
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
