AP EAMCET · Chemistry · Chemical Equilibrium

For a reaction
\(\mathrm{A}(\mathrm{g})+\frac{1}{2} \mathrm{~B}(\mathrm{~g}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\) heat
favorable conditions for the reaction to occur in the forward direction are

A Low \(\mathrm{T}\) and Low \(\mathrm{P}\)
B Low \(\mathrm{T}\) and high \(\mathrm{P}\)
C High \(T\) and Low \(P\)
D High \(\mathrm{T}\) and high \(\mathrm{P}\)

Verified Solution

Answer & Solution

Correct Answer

(B) Low \(\mathrm{T}\) and high \(\mathrm{P}\)

Step-by-step Solution

Detailed explanation

\(\mathrm{A}(\mathrm{g})+\frac{1}{2} \mathrm{~B}(\mathrm{~g}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\) heat exothermic reaction \(\therefore \quad\) Low temperature is favourable. \(\Delta \mathrm{n}=-1-\left(1+\frac{1}{2}\right)=1-\frac{3}{2}=-\frac{1}{2}\) no. of gas…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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For a reaction\(\mathrm{A}(\mathrm{g})+\frac{1}{2} \mathrm{~B}(\mathrm{~g}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\) heatfavorable conditions for the reaction to occur in the forward direction are

Step-by-step Solution

For a reaction
\(\mathrm{A}(\mathrm{g})+\frac{1}{2} \mathrm{~B}(\mathrm{~g}) \rightleftharpoons \mathrm{C}(\mathrm{g})+\) heat
favorable conditions for the reaction to occur in the forward direction are