Advertisements
Advertisements
Question
Explain the following:
Generally sulphide ores are converted into oxides before reduction.
Advertisements
Solution
Sulphide ores cannot be reduced easily but oxide ores can be easily reduced, hence sulphide ores are generally converted into oxides before reduction.
APPEARS IN
RELATED QUESTIONS
How is ‘cast iron’ different from ‘pig iron’?
The reaction,
Cr2O3 + 2Al → Al2O3 + 2Cr
(ΔGθ = -421kJ) is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?
Is it true that under certain conditions, Mg can reduce SiO2 and Si can reduce MgO? What are those conditions?
Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
Write chemical reactions taking place in the extraction of zinc from zinc blende.
State the role of silica in the metallurgy of copper.
How will you convert the following:
Zinc blende to Zinc metal
In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \[\ce{Cu2O}\] with ______.
In the metallurgy of aluminium ______.
For the metallurgical process of which of the ores calcined ore can be reduced by carbon?
(i) Haematite
(ii) Calamine
(iii) Iron pyrites
(iv) Sphalerite
How is copper extracted from low grade copper ores?
The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving reaction.
Why is sulphide ore of copper heated in a furnace after mixing with silica?
Write down the reactions taking place in Blast furnace related to the metallurgy of iron in the temperature range 500-800 K.
Explain the following:
Carbon and hydrogen are not used as reducing agents at high temperatures.
Heating of MgCl2 6H2O in absence of HCl gives ______.
