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CBSE
Class 12 Chemistry
General Principles And Processes Of Isolation Of Elements
Quiz 2
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Ellingham diagram represents change of
0%
ΔG with temperature
0%
ΔH with temperature
0%
ΔG with pressure
0%
(ΔG – TΔS) with temperature
Explanation
ΔG with temperature
During the extraction of haematite, limestone is added which acts as
0%
flux
0%
slag
0%
reducing agent
0%
gangue
Explanation
flux
In blast furnace iron oxide is reduced by
0%
silica
0%
carbon monoxide
0%
carbon
0%
lime stone
Explanation
carbon monoxide
From the Ellingham graph between Gibb’s energy and temperature, out of C and CO with is a better reducing agent for ZnO?
0%
Carbon
0%
CO
0%
Both of these
0%
None of these
Explanation
Carbon
In a thermite process is used as reducing agent.
0%
Zn
0%
Al
0%
Mn
0%
Fe
Explanation
Al
Blister copper is
0%
impure copper
0%
obtained in self reduction process during bessermerisation
0%
Both are correct
0%
None is correct
Explanation
Both are correct
Which of the following slags is produced during extraction of iron?
0%
CaSiO
0%
FeSiO
0%
MgSiO
0%
ZnSiO
Explanation
CaSiO
Which of the following oxides cannot be reduced by hydrogen?
0%
Ferric oxide
0%
Aluminium oxide
0%
Zinc oxide
0%
Cupric oxide
Explanation
Aluminium oxide
0 h : 0 m : 1 s
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