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Chemistry · Chemical Equilibrium

NEET (UG) 2025 — Question 81

Higher yield of NO in

N2( g)+O2( g)⇌2NO(g)\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g}) can be obtained at

[ΔH\left[\Delta \mathrm{H}\right. of the reaction =+180.7 kJ mol−1]\left.=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1}\right]

I. higher temperature

II. lower temperature

III. higher concentration of N2\mathrm{N}_{2}

IV. higher concentration of O2\mathrm{O}_{2}

Choose the correct answer from the options given below:

  1. Option A:

    I, IV only

  2. Option B:

    II, IIIonly

  3. Option C:

    II, III, IV only

  4. Option D:

    I, III, IV only

    Correct

Answer: D

Step-by-step solution

N2( g)+O2( g)⇌2NO(g);ΔH=+180.7 kJ mol−1\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NO}_{(\mathrm{g})} ; \Delta \mathrm{H}=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1}

(A) as T↑⇒\mathrm{T} \uparrow \Rightarrow reaction shifts forward

(B) as T↓⇒\mathrm{T} \downarrow \Rightarrow reaction shifts backward

(C) as [N2]↑⇒\left[\mathrm{N}_{2}\right] \uparrow \Rightarrow reaction shifts forward

(D) as [O2]↑⇒\left[\mathrm{O}_{2}\right] \uparrow \Rightarrow reaction shifts forward

Answer key and solution verified before publishing.

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Exam
NEET (UG) 2025
Paper
2025 paper
Subject
Chemistry
Chapter
Chemical Equilibrium
Topic
Factors affecting equilibrium &Le Chatelier's Principle

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Higher yield of NO in N 2 ( g )+ O 2 ( g ) rightleftharpoons 2 NO ( g… | NEET (UG) 2025 PYQ with Solution · DhiX AI