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प्रश्न
Iron is _______.
पर्याय
more reactive than zinc
more reactive than aluminium
less reactive than copper
less reactive than aluminium
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उत्तर
Iron is less reactive than aluminium.
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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?
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Why do gold ornaments look new even after several years of use?
Define the term ore.
What is meant by the ‘concentration of ore’?
What is the difference between a mineral and an ore?
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
Name the electrode at which aluminium metal is produced.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
The metal which can be extracted from the bauxite ore is ______.
Aluminum is used in thermite welding:
what is ignition mixture?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Name the following:
The substance added to get rid of gangue in the extraction of metal.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Write the molecular formulae of the following compound.
Cryolite
Write the molecular formulae of the following compound.
Sodium aluminate
Explain the concept of Calcination.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
