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प्रश्न
Write the name.
The molecular formula of main ore of aluminium –
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उत्तर
The molecular formula of main ore of aluminium – Al2O3•nH2O
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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?
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
The process by which sulphide ore is concentrated.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Name one metal which is extracted by reduction with heat alone.
The metal which can be extracted from pyrolusite ore is:
(a) mercury
(b) manganese
(c) aluminium
(d) magnesium
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Aluminum is used in thermite welding:
what is thermit?
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Name the following:
Name two metals always find in combined state.
Define the term:
Slag
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Identify who I am!
Ore of Aluminum- ______
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
Which of the statements about the reaction, \[\ce{ZnO + CO -> Zn + CO2}\] is correct?
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
