JEE Main20231 Feb 2023Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual
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
Options
- ABoth A and R are correct and R is the correct explanation of A
- BA is not correct but R is correct
- C(3) Both A and R are correct but R is NOT the correct explanation of A
- DA is correct but R is not correct
Correct answer
D. A is correct but R is not correct
Step-by-step solution
2 C ( s ) + O 2 (   g ) → 2 CO ( g ) As the number of moles of gas increases entropy increases. ∆ r S ° is + ve ∆ r G o = ∆ H ° - T ∆ r S ° Slope = ∆ r S ° = - ve As temperature increases Δ r G ° becomes more negative thus it has lower tendency to get decomposed. Hence, A is correct but R is not correct.