General Principles And Processes Of Isolation Of Metals Question 11
Question 11 - 01 February - Shift 1
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
(1) Both A and R are correct and R is the correct explanation of $A$
(2) A is not correct but $R$ is correct
(3) Both A and R are correct but R is NOT the correct explanation of $A$
(4) A is correct but R is not correct
Show Answer
Answer: (4)
Solution:
Formula: Ellingham Diagram
$2 C(s)+O_2(g) \to 2 CO(g)$
$\Delta_r S^{o}$ is +ve, $\Delta_r G^{o}=\Delta_r H^{o}-T \Delta_r S^{\circ}$; thus slope is
negative
As temperature increases $\Delta_r G^{0}$ becomes more
negative thus it has lower tendency to get
decomposed.
