In the modern blast furnaces,the charge consists of a mixture of

Chemical reduction is not suitable for converting

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ In an Ellingham diagram,the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.
Reason $R:$ $CO$ tends to get decomposed at higher temperature.
In the light of the above statements,choose the correct answer from the options given below:

Formation of metallic copper from the sulphide ore in the normal thermo-metallurgical process essentially involves which one of the following reactions?

What is the substance added during the extraction of metals that combines with impurities to form a molten product called?

What is the slag formed in the extraction of iron?