Which of the following oxides cannot be reduced by hydrogen?
Answer: B
(b) Aluminium oxide
Which of the following slags is produced during extraction of iron?
Answer: A
(a) CaSiO3
In a thermite process is used as reducing agent.
Answer: B
(b) Al
From the Ellingham graph between Gibb’s energy and temperature, out of C and CO with is a better reducing agent for ZnO?
Answer: A
(a) Carbon
In blast furnace iron oxide is reduced by
Answer: B
(b) carbon monoxide
During the extraction of haematite, limestone is added which acts as
Answer: A
(a) flux
Ellingham diagram represents change of
Answer: A
(a) ΔG with temperature
In metallurgical process, aluminium acts as
Answer: B
(b) a reducing agent
Impurities of sulphur, silicon and phosphorus can be removed from cast iron by adding
Answer: C
(c) limestone which changes impurities into oxides and pass into slag