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Q.

On the basis of Ellingham diagram which of the following is/are correct?

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a

Below the boiling point, TΔS factor is almost same irrespective of metal.

b

If randomness increases the slope increases.

c

Entropy change for all metal oxides is roughly same.

d

Above ΔG=0 line, oxide decomposes into metal and oxygen.

answer is B, C, D.

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Detailed Solution

Above  ΔG=0 line free energy becomes positive so oxide decomposes.

In the Ellingham diagram if randomness increases slope increases and the value of slope below the diagram is same. 

ΔGT=−ΔS

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