NEET · Chemistry · STD 11 - 6.1. Equilibrium - 1 (chemical Equilibrium)

Higher yield of NO in
\(\text N _2(\text g)+ \text O _2(\text g) \rightleftharpoons 2 \text{NO} (\text g)\) can be obtained at
[\(\Delta \text H\) of the reaction \(=+180.7 \text{kJ mol} ^{-1}\)]
A. higher temperature
B. lower temperature
C. higher concentration of \(\text N _2\)
D. higher concentration of \(\text O _2\)
Choose the correct answer from the options given below :

A A, D only
B B, C only
C B, C, D only
D A, C, D only

Verified Solution

Answer & Solution

Correct Answer

(D) A, C, D only

Step-by-step Solution

Detailed explanation

\(\text N _2(\text g)+ \text O _{2(\text g)} \rightleftharpoons 2 \text{NO} _{(\text g)} ; \Delta \text H =+180.7 \text{kJ mol} ^{-1}\)
(A) as \(\text T \uparrow \Rightarrow\) reaction shifts forward
(B) as \(\text T \downarrow \Rightarrow\) reaction shifts backward
(C) as \(\left[\text N _2\right] \uparrow \Rightarrow\) reaction shifts forward
(D) as \(\left[\text O _2\right] \uparrow \Rightarrow\) reaction shifts forward

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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\(D\) \(n_2=6 \text { to } n_1=2\)	\(IV\) \(486.1\)

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\(A\). Isothermal process	\(I\). No heat exchange
\(B\). Isochoric process	\(II\). Carried out at constant temperature
\(C\). Isobaric process	\(III\). Carried out at constant volume
\(D\). Adiabatic process	\(IV\). Carried out at constant pressure

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