01. Which of the following plot gives Ellingham Diagram?
a) ΔS Vs T b) ΔG˚ Vs T c) ΔG˚ Vs 1/T d) ΔG˚ Vs T2
02. In the Ellingham diagram, for the formation of carbon monoxide
a) (ΔS˚ / ΔT) is a negative b) (ΔG˚ / ΔT) is a positive
c) (ΔG˚ / ΔT) is a negative
d) initially (ΔT / ΔG˚) is a positive, after 700˚C (ΔG˚ / ΔT) is a negative
03. Which one of the following reduction is thermodynamically feasible?
a) Cr2O3 + 2Al → Al2O3 + 2Cr b) Al2O3 + 2Cr → Cr2O3 + 2Al
c) 3TiO2 + 4Al → 2Al2O3 + 3Ti d) both “a” and “c”
04. Which one of the following is true with respect to Ellingham diagram?
a) Free energy changes follow a straight line. Deviation occurs when there is a phase change
b) Negative slope of CO shows that it becomes more stable with increase in temperature
c) Positive slope of metal oxides shows that their stabilities decrease with increase in
temperature
d) All the above.
05. The most of the metal oxide formation in the Ellingham diagram the slope becomes
a) Negative b) Positive c) 0 d) does not change
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ellingham diagram represent graph mark as brainlist answer
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