MHT CET · Chemistry · General Principles and Processes of Isolation of Metals

How many moles of gaseous oxygen at one atmosphere is considered for the reaction with element for plotting a graph in Ellingham diagram?

A 2
B \(0 \cdot 25\)
C \(0 \cdot 5\)
D 1

Verified Solution

Answer & Solution

Correct Answer

(D) 1

Step-by-step Solution

Detailed explanation

1
The standard free energy change (6G0 ) per 1 mole of oxygen is represented on the \(y\)-axis, while temperature (K) is plotted on the \(x\)-axis in the Ellingham diagram graph. For the Ellingham diagram, one mole of gaseous oxygen at one atmosphere is used to create a graph for the reaction with element. The following is an example:

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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