Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In an Ellingham diagram, the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.
Reason R: CO tends to get decomposed at higher temperature.
In the light of the above statements, choose the correct answer from the options given below a
Select the correct option:
A
Both A and R are correct and R is the correct explanation of A
B
A is not correct but R is correct
C
Both A and R are correct but R is NOT the correct explanation of A
D
A is correct but R is not correct
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
$\begin{aligned} & 2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{CO}(\mathrm{g}) \\ & \Delta_{\mathrm{L}} \mathrm{S}^{\circ} \text { is }+\mathrm{ve}, \Delta_{\mathrm{L}} \mathrm{G}^{\circ}=\Delta_{\mathrm{L}} \mathrm{H}^{\circ}-\mathrm{T} \Delta_{\mathrm{L}} \mathrm{S}^{\circ}\end{aligned}$ thus slope is negative As temperature increases $\Delta_{\mathrm{r}} \mathrm{G}^{\circ}$ becomes more negative thus it has lower tendency to get decomposed.
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