Higher yield of NO in N2(g) + O2(g) 2NO(g) can be obtained at [δ H of the reaction = +180.7 kJ mol^-1]: A. Higher temperature, B.…

Question

Higher yield of NO in N2(g) + O2(g) 2NO(g) can be obtained at [δ H of the reaction = +180.7 kJ mol^-1]: A. Higher temperature, B. Lower temperature, C. Higher concentration of N2, D. Higher concentration of O2.

Choose the correct answer from the options given below:

1. A. A, D only
2. B. B, C only
3. C. B, C, D only
4. D. A, C, D only (Correct answer)

Correct Answer

Option D — A, C, D only

Detailed Solution & Explanation

The correct answer is A, C, D only.

Key Points

• The reaction is endothermic ($\Delta H=+180.7$ kJ mol$^{-1}$), so increasing temperature shifts equilibrium forward, raising NO yield (A).
• Increasing the concentration of a reactant (N$_2$ or O$_2$) also shifts the equilibrium forward (C and D).
• Lower temperature (B) would decrease the yield, so it is not selected.