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JEE Main 20231 FebruaryMorning Shift
Exam
JEE Main
Year
2023
Date
1 February
Shift
Morning Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2023 · 1 February · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

Given below are two statements: one is labelled as Assertion A and...

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason RR

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

  1. ABoth A and R are correct and R is the correct explanation of A
  2. BA is not correct but R is correct
  3. C(3) Both A and R are correct but R is NOT the correct explanation of A
  4. DA is correct but R is not correct

Correct answer

D. A is correct but R is not correct

Step-by-step solution

2C(s)+O2(g)→2CO(g)2C ( s ) + {O}_{2} ( g ) \to 2CO ( g )

As the number of moles of gas increases entropy increases.

∆rS°{∆}_{r}S ° is +ve+ ve

∆rGo=∆H°−T∆rS°{∆}_{r}{G}^{o} = ∆ H ° - T{∆}_{r}S °

Slope = ∆rS°=−ve{∆}_{r}S °=- ve

As temperature increases ΔrG°{\Delta}_{r}G ° becomes more negative thus it has lower tendency to get decomposed.

Hence, A is correct but R is not correct.

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