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प्रश्न
What is calcination?
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उत्तर
Calcination is a process in which the ore is heated to a high temperature below its melting point in the absence of air or in a limited supply of air.
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संबंधित प्रश्न
Explain calcination with reactions.
Define Hydrometallurgy?
What is the process in which concentrated ore is reduced to the corresponding metal by heating at high temperature with a reducing agent?
(a) Polling
(b) Pyrometallurgy
(c) Hydrometallurgy
(d) Calcination
Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?
Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why?
What is the role of zinc metal in the extraction of silver ?
Name the processes from which chlorine is obtained as a by-product.
MnO2 and Ca3(PO4)2 present in iron ore get reduced to Mn and P in the zone of _______.
(A) combustion
(B) reduction
(C) fusion
(D) slag formation
Complete the given chemical equations
`F_2 + 2Cl^(-)`
What is the action of carbon on the following metal oxides:
Fe2O3 in the blast furnace
What is the action of carbon on the following metal oxides :
ZnO in the vertical retort furnace
An element X (molar mass = 60 g mol−1) has a density of 6.23 g cm−3. Identify the type of cubic unit cell, if the edge length of the unit cell is 4 ✕ 10−8 cm.
Account for the following :
Reducing character decreases from SO2 to TeO2.
Which metal is also found in sea beds?
In the extraction of chlorine by electrolysis of brine ______.
Brine is electrolysed by using inert electrodes. The reaction at anode is ______.
Why are sulphide ores converted to oxide before reduction?
Which of the following reactions is an example of auto reduction?
