Which of the following elements is present as the impurity to the maximum extent in the big iron?
Carbon
Silicon
Phosphorus
Phosphorus
A.
Carbon
Pig iron contains about 4% carbon (major impurity) and other impurities (S, P, Si, Mn) in trace amount.
In the extraction of copper from its sulphide ore, the metal finally obtained by the reduction of cuprous oxide with
Iron (II) sulphide
Carbon monoxide
Copper (I) sulphide
Copper (I) sulphide
Which of the following pairs of metals is purified by van Arkel method?
Zr and Ti
Ag and Au
Ni and Fe
Ni and Fe
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
Copper (I) sulphide (Cu2S)
sulphur dioxide (SO2)
Iron sulphide (FeS)
Iron sulphide (FeS)
Identify the alloy containing a non-metal as a constituent in it.
Invar
Steel
Bell metal
Bell metal
