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Chemical Equilibrium question

2025 · Q133
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Chemical Equilibrium question

2025 · Q133

NEETChemistryChemical EquilibriumMCQ+4 / −1

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})N2​( g)+O2​( g)⇌2NO(g) can be obtained at [ΔH\left[\Delta \mathrm{H}\right.[ΔH of the reaction =+180.7 kJ mol−1]\left.=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1}\right]=+180.7 kJ mol−1]

A. Higher temperature

B. Lower temperature

C. Higher concentration of N2\mathrm{N}_2N2​

D. Higher concentration of O2\mathrm{O}_2O2​

Choose the correct answer from the options given below :

  1. A
    B, C, D only
  2. B
    A, C, D only
  3. C
    A, D only
  4. D
    B, C only
View written solutionFree

Correct answer: B

Yield of the product generally depends on

$\bullet$ Temperature

$\bullet$ Concentration of reactant(s) and product(s)

$\bullet$ Pressure

As this is an endothermic reaction ( $\Delta \mathrm{H}=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1}$ ), so, increase in temperature will shift equilibrium in forward direction to increase yield of NO.

Increase in concentration of reactants ( $\mathrm{N}_2$ and $\mathrm{O}_2$ ) also shifts the equilibrium in forward direction and increase the yield of NO.

Hence, (A), (C) and (D) only will increase yield of NO.

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