Consider the reaction represented by the equation: N2O4(g) ⇌ 2NO2(g) ; ∆H = + x kJmol-1. What happens when the temperature is reduced at equilibrium?

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A. Concentration of N2O4(g) decreases
B. Concentration of N2O4(g) increases.
C. Pressure exerted by the gases increases
D. Pressure exerted by the gases remains constant

Correct Answer: Option B

B. Concentration of N2O4(g) increases.

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