For a reaction | Metallurgy

JEE MAIN 2020

06-09-2020 S2

Question

For a reaction, $$ 4 \mathrm{M}(\mathrm{~s})+\mathrm{nO}_2(\mathrm{~g}) \rightarrow 2 \mathrm{M}_2 \mathrm{O}_{\mathrm{n}}(\mathrm{~s}) $$ the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which

Select the correct option:

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

the slope changes from positive to negative

the slope changes from negative to positive

the slope changes from positive to zero

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution