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प्रश्न
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
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उत्तर
At anode: \[\ce{2O^{2-} -> O2 + 4e-}\]
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
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 two uses of bronze.
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
How is aluminium metal extracted? Explain with the help of an equation.
Name the metal which is extracted from the ore called 'rock salt'.
An ore of manganese metal is:
(a) bauxite
(b) haematite
(c) cuprite
(d) pyrolusite
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
Give reasons, why aluminum is used in:
making alloys
Give reasons, why aluminum is used in:
In aluminiothermy
Define the term:
Slag
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
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.
