Question

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. A is correct but $R$ is not correct
• B. $A$ is not correct but $R$ is correct
• C. Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$
• D. Both $A$ and $R$ are correct but $R$ is NOT the correct explanation of $A$

Answer 1

Answer: (A)

A is correct but $R$ is not correct

Answer 2

Correct answer is (a): A is correct but R is not correct
2C(s)+O2​(g)→2CO(g)
Δr​S0 is +ve,Δr​G0=Δr​H0−TΔr​S0; thus slope is negative
As temperature increases Δr​G0 becomes more negative thus it has lower tendency to get decomposed.