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प्रश्न
Write the name.
Extraction of aluminium from alumina-
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उत्तर
Electrolytic reduction
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संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
Name two metals which are always found in combined state.
Name the metal which is extracted from the ore called ‘rock salt’.
Which of the following metals can be obtained from haematite ore?
The metal which is always present in an amalgam is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
- Name the metal and write its chemical symbol.
- Write the name and formula of the sulphide ore.
- Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
- Name a common device in which this metal is used.
- Can this metal displace copper from copper sulphate solution? Why?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Name the following:
Name two metals always find in combined state.
Define the term:
Flux
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Answer the following question :
What is the difference between calcination and roasting.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Gold and silver are active metals.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
In extraction of copper, the flux used is ____________.
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
