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 $A$

Hint:

In an Ellingham diagram, a negative slope indicates that the reaction becomes more favorable at higher temperatures, while a positive slope indicates that the reaction becomes less favorable.

Answer 1

The Correct Option is A

Assertion A is correct: In an Ellingham diagram, the oxidation of carbon to carbon monoxide does indeed show a negative slope, indicating that the reaction becomes more favorable as temperature increases.

Reason R is incorrect: While CO is a reducing agent, it does not tend to decompose at higher temperatures; rather, the decomposition of CO to C and \( \text{O}_2 \) is unfavorable at high temperatures, as shown by its position on the Ellingham diagram.

Conclusion: The correct answer is 4.