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प्रश्न
_______ is the least reactive metal.
विकल्प
silver
sodium
zinc
gold
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उत्तर
Gold is the least reactive metal.
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संबंधित प्रश्न
Which of the following pairs will give displacement reactions?
How many carats is pure gold? Why is pure gold not suitable for making ornaments?
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
What is the difference between a mineral and an ore?
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
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Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
What is meant by concentration of ores?
Name the methods by which concentrated ore is converted to metallic oxide.
Find the odd one out and give its explanation.
Mercury, silver, gold are highly reactive metals.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Write the molecular formulae of the following compound.
Cryolite
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
In extraction of copper, the flux used is ____________.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
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?
