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Q.

For a reaction 4M(s)+nO2(g)2M2On(s), the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred fromt the plot as the point at which:

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a

the slope change from positive to zero

b

the slope change from negative to positive

c

the free energy change shows a change from negative to positive value

d

the slope change from positive to negative

answer is D.

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Detailed Solution

If the  G for the formation of oxide is negative then the oxide is stable more negative the G more is stability of oxide

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