NEET 2025 — Chemistry solution

NEET2025Chemistry

Higher yield of NO in N $_{2}$ (g) + O $_{2}$ (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 N $_{2}$

D. higher concentration of O $_{2}$

Choose the correct answer from the options given below:

Solution

The reaction is endothermic ( $Δ H > 0$ ). By Le Chatelier's principle:

Increasing temperature shifts the equilibrium forward → more NO. A is correct.

Increasing concentration of either reactant (N $_{2}$ or O $_{2}$ ) shifts the equilibrium forward → more NO. C and D are correct.

Lower temperature would shift it backward (B is wrong).

$∴$ A, C and D.

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