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प्रश्न
How is ‘cast iron’ different from ‘pig iron’?
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उत्तर
Pig iron: The iron obtained from a blast furnace is known as pig iron. It contains around 4% carbon and many impurities, such as S, P, Si, and Mn, in smaller amounts.
Cast iron: It is obtained by melting pig iron and coke using a hot air blast. It contains a lower amount of carbon (about 3%) than pig iron. Unlike pig iron, cast iron is extremely hard and brittle.
संबंधित प्रश्न
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.
State the role of silica in the metallurgy of copper.
Write chemical reactions taking place in the extraction of copper from Cu2 S.
How will you convert the following:
Zinc blende to Zinc metal
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.
Explain the following:
Generally sulphide ores are converted into oxides before reduction.
Explain the following:
Silica is added to the sulphide ore of copper in the reverberatory furnace.
A cuprous ore among the following is:-
Heating of MgCl2 6H2O in absence of HCl gives ______.
Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is ______.
